diff --git a/src/system/tonedownload.py b/src/system/tonedownload.py
new file mode 100644
index 0000000..148b2c8
--- /dev/null
+++ b/src/system/tonedownload.py
@@ -0,0 +1,525 @@
+"""Tone3000 API client for searching and downloading NAM models and IRs.
+
+Tone3000 (successor to ToneHunt) is a Supabase-backed Next.js app that
+hosts NAM .nam model files and IR .wav files. Its Supabase public anon key
+is embedded in the client-side JavaScript — we use it here as a read-only
+API client for the Supabase REST API.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import re
+import time
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any, Optional
+
+import aiohttp
+
+logger = logging.getLogger(__name__)
+
+# ── Constants ─────────────────────────────────────────────────────────
+
+SUPABASE_URL = "https://api.tone3000.com"
+SUPABASE_REST = f"{SUPABASE_URL}/rest/v1"
+SUPABASE_STORAGE = f"{SUPABASE_URL}/storage/v1/object/public"
+
+# Anon key for Supabase read-only access. Extracted from the Tone3000
+# Next.js client bundle. This is a public key designed to be embedded
+# in client-side JS — it only allows read access to public tables.
+# If it ever changes, the client will dynamically re-fetch it from
+# the Tone3000 homepage JS bundles.
+SUPABASE_ANON_KEY = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Imd6eWJpdW9weGtkeGJ5dG5vamRzIiwicm9sZSI6ImFub24iLCJpYXQiOjE3MzgwODIxNjUsImV4cCI6MjA1MzY1ODE2NX0.Gq66BJXjtLsqP2nAGXm9Xb9PAjoeZalWUj66K4nmVSU"
+
+# Cache TTL in seconds
+CACHE_TTL = 300  # 5 minutes
+
+# Default download directory
+DEFAULT_MODELS_DIR = Path.home() / ".pedal" / "models"
+DEFAULT_IRS_DIR = Path.home() / ".pedal" / "irs"
+
+
+# ── Data types ────────────────────────────────────────────────────────
+
+
+@dataclass
+class ModelResult:
+    """A search result representing a NAM model on Tone3000."""
+
+    id: int
+    name: str
+    download_url: str
+    size_bytes: Optional[int] = None
+    architecture: Optional[str] = None
+    pack_name: Optional[str] = None
+    author_id: Optional[str] = None
+    author_username: Optional[str] = None
+    author_avatar_url: Optional[str] = None
+    tone_id: Optional[int] = None
+    tone_title: Optional[str] = None
+    tone_gear: Optional[str] = None
+    tone_images: list[str] = field(default_factory=list)
+    tone_description: Optional[str] = None
+    downloads: int = 0
+    likes: int = 0
+    created_at: Optional[str] = None
+
+    @property
+    def is_ir(self) -> bool:
+        """Check if this model is an impulse response (.wav file)."""
+        return self.tone_gear == "ir" or (self.download_url or "").lower().endswith(".wav")
+
+    @property
+    def filename(self) -> str:
+        """Get the filename from the download URL."""
+        return Path(self.download_url.split("/")[-1]).name
+
+    @property
+    def display_name(self) -> str:
+        return self.tone_title or self.name or self.filename
+
+    @property
+    def thumbnail_url(self) -> Optional[str]:
+        if self.tone_images:
+            return self.tone_images[0]
+        return None
+
+
+@dataclass
+class IRResult(ModelResult):
+    """A search result representing an IR file."""
+
+    sample_rate: Optional[int] = None
+    num_taps: Optional[int] = None
+    length_ms: Optional[float] = None
+
+    @property
+    def is_ir(self) -> bool:
+        return True
+
+
+# ── Anon key discovery ────────────────────────────────────────────────
+
+
+async def discover_anon_key(session: aiohttp.ClientSession) -> Optional[str]:
+    """Fetch the Supabase anon key from the Tone3000 website JS bundle.
+
+    The key is embedded in the Next.js client-side chunk.
+    Returns None if discovery fails (silently falls back to hardcoded key).
+    """
+    try:
+        async with session.get("https://tone3000.com", timeout=aiohttp.ClientTimeout(total=15)) as resp:
+            html = await resp.text()
+
+        # Find JS chunk URLs that contain the client setup code
+        chunk_urls = re.findall(r'src="([^"]*2274[^"]*\.js[^"]*)"', html)
+        if not chunk_urls:
+            # Fallback: look for any chunk with the key pattern
+            chunk_urls = re.findall(
+                r'src="(/_[^"]*chunks/[^"]*\.js[^"]*)"', html
+            )
+            # Sort by name to get a deterministic order
+            chunk_urls = sorted(set(chunk_urls))
+
+        for chunk_url in chunk_urls[:5]:
+            full_url = f"https://tone3000.com{chunk_url}" if chunk_url.startswith("/") else chunk_url
+            async with session.get(full_url, timeout=aiohttp.ClientTimeout(total=15)) as resp:
+                js = await resp.text()
+
+            # Pattern: createBrowserClient)("url","token")
+            match = re.search(
+                r'createBrowserClient\)\(["\']https://api\.tone3000\.com["\'],["\']([^"\']+)["\']',
+                js,
+            )
+            if match:
+                key = match.group(1)
+                if key.startswith("eyJ"):
+                    logger.info("Discovered Supabase anon key from JS bundle")
+                    return key
+
+        logger.warning("Could not discover anon key from Tone3000 JS")
+        return None
+    except Exception as e:
+        logger.debug("Anon key discovery failed: %s", e)
+        return None
+
+
+# ── API Client ────────────────────────────────────────────────────────
+
+
+class Tone3000Client:
+    """Client for the Tone3000 Supabase REST API.
+
+    Uses the public anon key embedded in the Tone3000 web client for
+    read-only access to the models, tones, and users tables.
+    """
+
+    def __init__(
+        self,
+        anon_key: str = SUPABASE_ANON_KEY,
+        models_dir: Path = DEFAULT_MODELS_DIR,
+        irs_dir: Path = DEFAULT_IRS_DIR,
+        session: Optional[aiohttp.ClientSession] = None,
+    ) -> None:
+        self._anon_key = anon_key
+        self._models_dir = models_dir
+        self._irs_dir = irs_dir
+        self._session = session
+        self._cache: dict[str, tuple[float, list[dict]]] = {}
+        self._headers = {
+            "apikey": anon_key,
+            "Authorization": f"Bearer {anon_key}",
+            "Accept": "application/json",
+        }
+        self._named_user_cache: dict[str, Optional[dict]] = {}
+        self._named_tone_cache: dict[int, Optional[dict]] = {}
+
+    # ── Session management ───────────────────────────────────────
+
+    async def _get_session(self) -> aiohttp.ClientSession:
+        if self._session is None or self._session.closed:
+            self._session = aiohttp.ClientSession(
+                headers=self._headers,
+                timeout=aiohttp.ClientTimeout(total=30),
+            )
+        return self._session
+
+    async def close(self) -> None:
+        if self._session and not self._session.closed:
+            await self._session.close()
+
+    # ── Caching ──────────────────────────────────────────────────
+
+    def _get_cached(self, key: str) -> Optional[list[dict]]:
+        entry = self._cache.get(key)
+        if entry and (time.monotonic() - entry[0]) < CACHE_TTL:
+            return entry[1]
+        return None
+
+    def _set_cache(self, key: str, data: list[dict]) -> None:
+        self._cache[key] = (time.monotonic(), data)
+
+    # ── Core API calls ───────────────────────────────────────────
+
+    async def _supabase_get(
+        self, path: str, params: Optional[dict] = None
+    ) -> list[dict]:
+        """Make a GET request to the Supabase REST API."""
+        session = await self._get_session()
+        url = f"{SUPABASE_REST}/{path}"
+        try:
+            async with session.get(url, params=params) as resp:
+                if resp.status in (200, 206):
+                    data = await resp.json()
+                    return data if isinstance(data, list) else [data]
+                else:
+                    text = await resp.text()
+                    logger.warning(
+                        "Supabase API error %d: %s", resp.status, text[:200]
+                    )
+                    return []
+        except (aiohttp.ClientError, asyncio.TimeoutError) as e:
+            logger.warning("Supabase request failed: %s", e)
+            return []
+
+    # ── Search ───────────────────────────────────────────────────
+
+    async def search_models(
+        self,
+        query: str,
+        page: int = 0,
+        page_size: int = 20,
+        force_refresh: bool = False,
+    ) -> list[ModelResult]:
+        """Search Tone3000 for NAM models matching the query.
+
+        Searches model names. Results are cached for 5 minutes.
+        """
+        cache_key = f"models:{query}:{page}"
+        if not force_refresh:
+            cached = self._get_cached(cache_key)
+            if cached is not None:
+                return [ModelResult(**r) for r in cached]
+
+        # Search models table by name similarity
+        raw_models = await self._supabase_get("models", {
+            "select": "id,name,model_url,size,pack_name,user_id,tone_id,architecture_version,created_at",
+            "name": f"ilike.*{query}*",
+            "order": "created_at.desc",
+            "limit": str(page_size),
+            "offset": str(page * page_size),
+        })
+
+        results = await self._enrich_models(raw_models)
+        self._set_cache(cache_key, [r.__dict__ for r in results])
+        return results
+
+    async def search_irs(
+        self,
+        query: str,
+        page: int = 0,
+        page_size: int = 20,
+        force_refresh: bool = False,
+    ) -> list[IRResult]:
+        """Search Tone3000 for IRs (impulse responses).
+
+        IRs are stored in the tones table with gear='ir'. We search
+        by tone title and return the linked model files.
+        """
+        cache_key = f"irs:{query}:{page}"
+        if not force_refresh:
+            cached = self._get_cached(cache_key)
+            if cached is not None:
+                return [IRResult(**r) for r in cached]
+
+        # Search tones with gear='ir' matching the query
+        raw_tones = await self._supabase_get("tones", {
+            "select": "id,title,description,gear,images",
+            "title": f"ilike.*{query}*",
+            "gear": "eq.ir",
+            "limit": str(page_size),
+            "offset": str(page * page_size),
+        })
+
+        results: list[IRResult] = []
+        seen_ids: set[int] = set()
+
+        for tone in raw_tones:
+            tone_models = await self._supabase_get("models", {
+                "select": "id,name,model_url,size,pack_name,user_id,tone_id,created_at",
+                "tone_id": f"eq.{tone['id']}",
+                "limit": "5",
+            })
+
+            for m in tone_models:
+                if m["id"] in seen_ids:
+                    continue
+                seen_ids.add(m["id"])
+
+                author = await self._get_user(m.get("user_id", ""))
+
+                ir = IRResult(
+                    id=m["id"],
+                    name=m.get("name", ""),
+                    download_url=m.get("model_url", ""),
+                    size_bytes=m.get("size"),
+                    pack_name=m.get("pack_name"),
+                    author_id=m.get("user_id"),
+                    author_username=author.get("username") if author else None,
+                    author_avatar_url=author.get("avatar_url") if author else None,
+                    tone_id=tone["id"],
+                    tone_title=tone.get("title"),
+                    tone_gear="ir",
+                    tone_images=tone.get("images", []),
+                    tone_description=tone.get("description"),
+                    created_at=m.get("created_at"),
+                )
+                results.append(ir)
+
+        self._set_cache(cache_key, [r.__dict__ for r in results])
+        return results
+
+    # ── Trending / Browse ────────────────────────────────────────
+
+    async def get_trending_models(self, limit: int = 20) -> list[ModelResult]:
+        """Get trending NAM models."""
+        raw = await self._supabase_get("models", {
+            "select": "id,name,model_url,size,pack_name,user_id,tone_id,architecture_version,created_at",
+            "order": "created_at.desc",
+            "limit": str(limit),
+        })
+        return await self._enrich_models(raw)
+
+    async def get_trending_irs(self, limit: int = 20) -> list[IRResult]:
+        """Get trending IRs."""
+        raw_tones = await self._supabase_get("tones", {
+            "select": "id,title,description,gear,images",
+            "gear": "eq.ir",
+            "order": "created_at.desc",
+            "limit": str(limit),
+        })
+
+        results: list[IRResult] = []
+        for tone in raw_tones:
+            tone_models = await self._supabase_get("models", {
+                "select": "id,name,model_url,size,pack_name,user_id,tone_id,created_at",
+                "tone_id": f"eq.{tone['id']}",
+                "limit": "3",
+            })
+            for m in tone_models[:1]:
+                author = await self._get_user(m.get("user_id", ""))
+                ir = IRResult(
+                    id=m["id"],
+                    name=m.get("name", ""),
+                    download_url=m.get("model_url", ""),
+                    size_bytes=m.get("size"),
+                    tone_title=tone.get("title"),
+                    tone_images=tone.get("images", []),
+                    author_username=author.get("username") if author else None,
+                    author_avatar_url=author.get("avatar_url") if author else None,
+                    created_at=m.get("created_at"),
+                )
+                results.append(ir)
+        return results
+
+    # ── Enrichment helpers ───────────────────────────────────────
+
+    async def _enrich_models(
+        self, raw_models: list[dict]
+    ) -> list[ModelResult]:
+        """Enrich raw model data with user/tone info."""
+        results: list[ModelResult] = []
+        for m in raw_models:
+            tone_data = None
+            if m.get("tone_id"):
+                tone_data = await self._get_tone(m["tone_id"])
+            author = await self._get_user(m.get("user_id", ""))
+
+            results.append(ModelResult(
+                id=m["id"],
+                name=m.get("name", ""),
+                download_url=m.get("model_url", ""),
+                size_bytes=m.get("size"),
+                architecture=m.get("architecture_version"),
+                pack_name=m.get("pack_name"),
+                author_id=m.get("user_id"),
+                author_username=author.get("username") if author else None,
+                author_avatar_url=author.get("avatar_url") if author else None,
+                tone_id=m.get("tone_id"),
+                tone_title=tone_data.get("title") if tone_data else None,
+                tone_gear=tone_data.get("gear") if tone_data else None,
+                tone_images=tone_data.get("images", []) if tone_data else [],
+                tone_description=tone_data.get("description") if tone_data else None,
+                created_at=m.get("created_at"),
+            ))
+        return results
+
+    async def _get_user(self, user_id: str) -> Optional[dict]:
+        if not user_id:
+            return None
+        if user_id in self._named_user_cache:
+            return self._named_user_cache[user_id]
+        data = await self._supabase_get("users", {
+            "select": "id,username,avatar_url,display_name",
+            "id": f"eq.{user_id}",
+            "limit": "1",
+        })
+        result = data[0] if data else None
+        self._named_user_cache[user_id] = result
+        return result
+
+    async def _get_tone(self, tone_id: int) -> Optional[dict]:
+        if tone_id in self._named_tone_cache:
+            return self._named_tone_cache[tone_id]
+        data = await self._supabase_get("tones", {
+            "select": "id,title,description,gear,images",
+            "id": f"eq.{tone_id}",
+            "limit": "1",
+        })
+        result = data[0] if data else None
+        self._named_tone_cache[tone_id] = result
+        return result
+
+    # ── Download ─────────────────────────────────────────────────
+
+    async def download_model(
+        self,
+        model: ModelResult,
+        progress_callback: Optional[callable] = None,
+    ) -> Optional[Path]:
+        """Download a NAM model to the pedal's models directory.
+
+        Returns the local path to the downloaded file, or None on failure.
+        """
+        dest_dir = self._models_dir
+        dest_dir.mkdir(parents=True, exist_ok=True)
+
+        filename = model.filename
+        if not filename.endswith(".nam"):
+            filename += ".nam"
+        dest_path = dest_dir / filename
+
+        return await self._download_file(model.download_url, dest_path, progress_callback)
+
+    async def download_ir(
+        self,
+        ir: IRResult,
+        progress_callback: Optional[callable] = None,
+    ) -> Optional[Path]:
+        """Download an IR file to the pedal's IRs directory."""
+        dest_dir = self._irs_dir
+        dest_dir.mkdir(parents=True, exist_ok=True)
+
+        filename = ir.filename
+        if not filename.endswith(".wav"):
+            filename += ".wav"
+        dest_path = dest_dir / filename
+
+        return await self._download_file(ir.download_url, dest_path, progress_callback)
+
+    async def _download_file(
+        self,
+        url: str,
+        dest_path: Path,
+        progress_callback: Optional[callable] = None,
+    ) -> Optional[Path]:
+        """Download a file with optional progress reporting."""
+        if not url:
+            logger.error("No download URL available")
+            return None
+
+        session = await self._get_session()
+        try:
+            async with session.get(
+                url, timeout=aiohttp.ClientTimeout(total=120)
+            ) as resp:
+                if resp.status not in (200, 302, 307):
+                    logger.warning("Download failed: HTTP %d", resp.status)
+                    return None
+
+                total = int(resp.headers.get("Content-Length", 0)) or 0
+                downloaded = 0
+
+                with open(dest_path, "wb") as f:
+                    async for chunk in resp.content.iter_chunked(8192):
+                        f.write(chunk)
+                        downloaded += len(chunk)
+                        if progress_callback and total:
+                            progress_callback(downloaded / total)
+
+                logger.info(
+                    "Downloaded %s (%d bytes)", dest_path.name, downloaded
+                )
+                return dest_path
+
+        except (aiohttp.ClientError, asyncio.TimeoutError, OSError) as e:
+            logger.error("Download failed: %s", e)
+            if dest_path.exists():
+                dest_path.unlink()
+            return None
+
+    # ── Connectivity check ───────────────────────────────────────
+
+    async def ping(self) -> bool:
+        """Check if the Tone3000 API is reachable."""
+        try:
+            data = await self._supabase_get("models", {"limit": "1"})
+            return len(data) > 0
+        except Exception:
+            return False
+
+
+# ── Convenience helpers ───────────────────────────────────────────────
+
+
+def format_size(size_bytes: Optional[int]) -> str:
+    """Format a file size in bytes to a human-readable string."""
+    if size_bytes is None:
+        return "Unknown"
+    mb = size_bytes / (1024 * 1024)
+    if mb < 1:
+        return f"{size_bytes / 1024:.1f} KB"
+    return f"{mb:.1f} MB"
\ No newline at end of file
diff --git a/src/web/server.py b/src/web/server.py
index f876714..c4ee052 100644
--- a/src/web/server.py
+++ b/src/web/server.py
@@ -31,6 +31,13 @@ from ..dsp.ir_loader import IRLoader
 from ..dsp.pipeline import AudioPipeline
 from ..presets.manager import PresetManager
 from ..presets.types import FXBlock, FXType, Preset
+from ..system.tonedownload import (
+    Tone3000Client,
+    ModelResult,
+    IRResult,
+    discover_anon_key,
+    format_size,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -118,6 +125,7 @@ class WebServer:
         self._manager = ConnectionManager()
         self._server: Optional[uvicorn.Server] = None
         self._task: Optional[asyncio.Task] = None
+        self._tonedownload: Optional[Tone3000Client] = None
         self._app = self._build_app()
 
     # ── App factory ─────────────────────────────────────────────────────
@@ -750,6 +758,129 @@ class WebServer:
                 self._manager.disconnect(ws)
                 logger.info("WebSocket client disconnected (%d active)", self._manager.active_count)
 
+        # ── Tone3000 downloader endpoints ───────────────────────
+
+        @app.get("/api/tonedownload/status")
+        async def tonedownload_status():
+            """Check if the Tone3000 API is reachable."""
+            client = await self._get_tonedownload()
+            if not client:
+                return {"online": False, "error": "Client not initialized"}
+            ok = await client.ping()
+            return {"online": ok}
+
+        @app.get("/api/models/tonedownload/search")
+        async def tonedownload_search_models(q: str = "", page: int = 0):
+            """Search Tone3000 for NAM models."""
+            client = await self._get_tonedownload()
+            if not client:
+                raise HTTPException(status_code=503, detail="Tone3000 client unavailable")
+            if not q.strip():
+                results = await client.get_trending_models()
+            else:
+                results = await client.search_models(q.strip(), page=page)
+            return {
+                "results": [
+                    {
+                        "id": r.id,
+                        "name": r.display_name,
+                        "filename": r.filename,
+                        "size": r.size_bytes,
+                        "size_display": format_size(r.size_bytes),
+                        "author": r.author_username or "Unknown",
+                        "author_avatar": r.author_avatar_url,
+                        "thumbnail": r.thumbnail_url,
+                        "download_url": r.download_url,
+                        "tone_description": r.tone_description,
+                        "pack_name": r.pack_name,
+                        "architecture": r.architecture,
+                        "created_at": r.created_at,
+                    }
+                    for r in results
+                ],
+            }
+
+        @app.get("/api/irs/tonedownload/search")
+        async def tonedownload_search_irs(q: str = "", page: int = 0):
+            """Search Tone3000 for IRs."""
+            client = await self._get_tonedownload()
+            if not client:
+                raise HTTPException(status_code=503, detail="Tone3000 client unavailable")
+            if not q.strip():
+                results = await client.get_trending_irs()
+            else:
+                results = await client.search_irs(q.strip(), page=page)
+            return {
+                "results": [
+                    {
+                        "id": r.id,
+                        "name": r.display_name,
+                        "filename": r.filename,
+                        "size": r.size_bytes,
+                        "size_display": format_size(r.size_bytes),
+                        "author": r.author_username or "Unknown",
+                        "author_avatar": r.author_avatar_url,
+                        "thumbnail": r.thumbnail_url,
+                        "download_url": r.download_url,
+                        "tone_description": r.tone_description,
+                        "created_at": r.created_at,
+                    }
+                    for r in results
+                ],
+            }
+
+        @app.post("/api/models/tonedownload/install")
+        async def tonedownload_install_model(data: dict):
+            """Download a .nam file to the pedal's models directory."""
+            client = await self._get_tonedownload()
+            if not client:
+                raise HTTPException(status_code=503, detail="Tone3000 client unavailable")
+            url = data.get("download_url", "")
+            name = data.get("name", "model.nam")
+            if not url:
+                raise HTTPException(status_code=400, detail="download_url required")
+            model = ModelResult(
+                id=data.get("id", 0),
+                name=name,
+                download_url=url,
+                size_bytes=data.get("size"),
+                pack_name=data.get("pack_name"),
+                tone_title=data.get("display_name", name),
+            )
+            path = await client.download_model(model)
+            if not path:
+                raise HTTPException(status_code=500, detail="Download failed")
+            # Refresh the model list via NAM host
+            nam = self.deps.nam_host
+            if nam:
+                nam.list_available_models()
+            return {"ok": True, "path": str(path), "filename": path.name}
+
+        @app.post("/api/irs/tonedownload/install")
+        async def tonedownload_install_ir(data: dict):
+            """Download a .wav IR to the pedal's IRs directory."""
+            client = await self._get_tonedownload()
+            if not client:
+                raise HTTPException(status_code=503, detail="Tone3000 client unavailable")
+            url = data.get("download_url", "")
+            name = data.get("name", "ir.wav")
+            if not url:
+                raise HTTPException(status_code=400, detail="download_url required")
+            ir = IRResult(
+                id=0,
+                name=name,
+                download_url=url,
+                size_bytes=data.get("size"),
+                tone_title=data.get("display_name", name),
+            )
+            path = await client.download_ir(ir)
+            if not path:
+                raise HTTPException(status_code=500, detail="Download failed")
+            ir_loader = self.deps.ir_loader
+            if ir_loader:
+                ir_loader.get_irs()
+            return {"ok": True, "path": str(path), "filename": path.name}
+
         return app
 
     # ── Network/BT state gathering ──────────────────────────────────
@@ -847,6 +978,21 @@ class WebServer:
             "bluetooth": self._gather_bt_state(),
         }
 
+    # ── Tone3000 client lazy init ────────────────────────────────
+
+    async def _get_tonedownload(self) -> Optional[Tone3000Client]:
+        """Lazily initialize the Tone3000 download client."""
+        if self._tonedownload is None:
+            from aiohttp import ClientSession
+            async with ClientSession() as session:
+                key = await discover_anon_key(session)
+            if not key:
+                # Fall back to hardcoded key
+                from ..system.tonedownload import SUPABASE_ANON_KEY
+                key = SUPABASE_ANON_KEY
+            self._tonedownload = Tone3000Client(anon_key=key)
+        return self._tonedownload
+
     # ── Lifecycle ────────────────────────────────────────────────────
 
     def start(self) -> None:
diff --git a/src/web/static/irs.js b/src/web/static/irs.js
index fe8aa7f..f4bdedc 100644
--- a/src/web/static/irs.js
+++ b/src/web/static/irs.js
@@ -92,4 +92,114 @@ async function uploadIR() {
     }
 }
 
-document.addEventListener('DOMContentLoaded', loadIRs);
\ No newline at end of file
+document.addEventListener('DOMContentLoaded', loadIRs);
+
+// ── Tone3000 Browser ────────────────────────────────────────────────
+
+const INSTALLED_IRS_KEY = 'tonedownload_installed_irs';
+
+function getInstalledIRs() {
+    try { return JSON.parse(localStorage.getItem(INSTALLED_IRS_KEY) || '[]'); } catch { return []; }
+}
+
+function markIRInstalled(url) {
+    const installed = getInstalledIRs();
+    if (!installed.includes(url)) {
+        installed.push(url);
+        localStorage.setItem(INSTALLED_IRS_KEY, JSON.stringify(installed));
+    }
+}
+
+function isIRInstalled(url) {
+    return getInstalledIRs().includes(url);
+}
+
+async function searchToneIRs() {
+    const input = document.getElementById('ir-tone-search');
+    const query = input.value.trim();
+    const resultsEl = document.getElementById('ir-tone-results');
+    const loaderEl = document.getElementById('ir-tone-loader');
+    const offlineEl = document.getElementById('ir-tone-offline');
+
+    resultsEl.innerHTML = '';
+    offlineEl.style.display = 'none';
+
+    if (!query) {
+        loadTrendingIRs();
+        return;
+    }
+
+    loaderEl.style.display = 'block';
+
+    try {
+        const data = await apiGet('/irs/tonedownload/search?q=' + encodeURIComponent(query));
+        loaderEl.style.display = 'none';
+        renderToneIRResults(resultsEl, data.results || []);
+    } catch (e) {
+        loaderEl.style.display = 'none';
+        if (e.message.includes('503') || e.message.includes('Failed to fetch')) {
+            offlineEl.style.display = 'block';
+        } else {
+            resultsEl.innerHTML = `<p class="text-muted">Error: ${escapeHtml(e.message)}</p>`;
+        }
+    }
+}
+
+async function loadTrendingIRs() {
+    const resultsEl = document.getElementById('ir-tone-results');
+    const loaderEl = document.getElementById('ir-tone-loader');
+    const offlineEl = document.getElementById('ir-tone-offline');
+
+    resultsEl.innerHTML = '';
+    offlineEl.style.display = 'none';
+    loaderEl.style.display = 'block';
+
+    try {
+        const data = await apiGet('/irs/tonedownload/search?q=');
+        loaderEl.style.display = 'none';
+        renderToneIRResults(resultsEl, data.results || []);
+    } catch (e) {
+        loaderEl.style.display = 'none';
+        if (e.message.includes('503') || e.message.includes('Failed to fetch')) {
+            offlineEl.style.display = 'block';
+        } else {
+            resultsEl.innerHTML = `<p class="text-muted">Error: ${escapeHtml(e.message)}</p>`;
+        }
+    }
+}
+
+function renderToneIRResults(container, results) {
+    if (!results || results.length === 0) {
+        container.innerHTML = '<p class="text-muted">No results found.</p>';
+        return;
+    }
+
+    let html = '';
+    for (const r of results) {
+        const installed = isIRInstalled(r.download_url);
+        const thumb = r.thumbnail
+            ? `<img src="${escapeHtml(r.thumbnail)}" alt="" class="tonedownload-thumb" loading="lazy" onerror="this.style.display='none'">`
+            : '<div class="tonedownload-thumb tonedownload-thumb-placeholder">📊</div>';
+
+        html += `<div class="tonedownload-card ${installed ? 'installed' : ''}">
+            ${thumb}
+            <div class="tonedownload-card-body">
+                <div class="tonedownload-card-name">${escapeHtml(r.name)}</div>
+                <div class="tonedownload-card-meta">
+                    ${escapeHtml(r.author)} · ${escapeHtml(r.size_display)}
+                </div>
+                ${r.tone_description ? `<div class="tonedownload-card-desc">${escapeHtml(r.tone_description.substring(0, 120))}</div>` : ''}
+            </div>
+            <div class="tonedownload-card-actions">
+                ${installed
+                    ? '<span class="tonedownload-installed-badge">✓ Installed</span>'
+                    : `<button class="btn btn-primary tonedownload-install-btn"
+                              onclick="installToneIR('${escapeHtml(r.download_url)}', '${escapeHtml(r.name)}', ${r.size || 'null'}, '${escapeHtml(r.filename)}')">
+                        Install
+                       </button>`
+                }
+            </div>
+        </div>`;
+    }
+    container.innerHTML = html;
+}
\ No newline at end of file
diff --git a/src/web/static/models.js b/src/web/static/models.js
index 6b43732..80f0b4b 100644
--- a/src/web/static/models.js
+++ b/src/web/static/models.js
@@ -92,4 +92,166 @@ async function uploadModel() {
     }
 }
 
-document.addEventListener('DOMContentLoaded', loadModels);
\ No newline at end of file
+document.addEventListener('DOMContentLoaded', loadModels);
+
+// ── Tone3000 Browser ────────────────────────────────────────────────
+
+const INSTALLED_MODELS_KEY = 'tonedownload_installed_models';
+
+function getInstalledModels() {
+    try {
+        return JSON.parse(localStorage.getItem(INSTALLED_MODELS_KEY) || '[]');
+    } catch { return []; }
+}
+
+function markInstalled(url) {
+    const installed = getInstalledModels();
+    if (!installed.includes(url)) {
+        installed.push(url);
+        localStorage.setItem(INSTALLED_MODELS_KEY, JSON.stringify(installed));
+    }
+}
+
+function isInstalled(url) {
+    return getInstalledModels().includes(url);
+}
+
+async function searchToneModels() {
+    const input = document.getElementById('model-tone-search');
+    const query = input.value.trim();
+    const resultsEl = document.getElementById('model-tone-results');
+    const loaderEl = document.getElementById('model-tone-loader');
+    const offlineEl = document.getElementById('model-tone-offline');
+
+    resultsEl.innerHTML = '';
+    offlineEl.style.display = 'none';
+
+    if (!query) {
+        loadTrendingModels();
+        return;
+    }
+
+    loaderEl.style.display = 'block';
+
+    try {
+        const data = await apiGet('/models/tonedownload/search?q=' + encodeURIComponent(query));
+        loaderEl.style.display = 'none';
+        renderToneResults(resultsEl, data.results || [], 'model');
+    } catch (e) {
+        loaderEl.style.display = 'none';
+        if (e.message.includes('503') || e.message.includes('Failed to fetch')) {
+            offlineEl.style.display = 'block';
+        } else {
+            resultsEl.innerHTML = `<p class="text-muted">Error: ${escapeHtml(e.message)}</p>`;
+        }
+    }
+}
+
+async function loadTrendingModels() {
+    const resultsEl = document.getElementById('model-tone-results');
+    const loaderEl = document.getElementById('model-tone-loader');
+    const offlineEl = document.getElementById('model-tone-offline');
+
+    resultsEl.innerHTML = '';
+    offlineEl.style.display = 'none';
+    loaderEl.style.display = 'block';
+
+    try {
+        const data = await apiGet('/models/tonedownload/search?q=');
+        loaderEl.style.display = 'none';
+        renderToneResults(resultsEl, data.results || [], 'model');
+    } catch (e) {
+        loaderEl.style.display = 'none';
+        if (e.message.includes('503') || e.message.includes('Failed to fetch')) {
+            offlineEl.style.display = 'block';
+        } else {
+            resultsEl.innerHTML = `<p class="text-muted">Error: ${escapeHtml(e.message)}</p>`;
+        }
+    }
+}
+
+function renderToneResults(container, results, type) {
+    if (!results || results.length === 0) {
+        container.innerHTML = '<p class="text-muted">No results found.</p>';
+        return;
+    }
+
+    let html = '';
+    for (const r of results) {
+        const installed = isInstalled(r.download_url);
+        const thumb = r.thumbnail
+            ? `<img src="${escapeHtml(r.thumbnail)}" alt="" class="tonedownload-thumb" loading="lazy" onerror="this.style.display='none'">`
+            : '<div class="tonedownload-thumb tonedownload-thumb-placeholder">🎸</div>';
+
+        html += `<div class="tonedownload-card ${installed ? 'installed' : ''}">
+            ${thumb}
+            <div class="tonedownload-card-body">
+                <div class="tonedownload-card-name">${escapeHtml(r.name)}</div>
+                <div class="tonedownload-card-meta">
+                    ${escapeHtml(r.author)} · ${escapeHtml(r.size_display)}
+                    ${r.architecture ? ` · ${escapeHtml(r.architecture)}` : ''}
+                </div>
+                ${r.tone_description ? `<div class="tonedownload-card-desc">${escapeHtml(r.tone_description.substring(0, 120))}</div>` : ''}
+            </div>
+            <div class="tonedownload-card-actions">
+                ${installed
+                    ? '<span class="tonedownload-installed-badge">✓ Installed</span>'
+                    : `<button class="btn btn-primary tonedownload-install-btn"
+                              onclick="installToneModel('${escapeHtml(r.download_url)}', '${escapeHtml(r.name)}', ${r.size || 'null'}, '${escapeHtml(r.filename)}')">
+                        Install
+                       </button>`
+                }
+            </div>
+        </div>`;
+    }
+    container.innerHTML = html;
+}
+
+async function installToneModel(downloadUrl, displayName, size, filename) {
+    const btn = event.target;
+    btn.disabled = true;
+    btn.textContent = 'Downloading...';
+
+    try {
+        const data = await apiPost('/models/tonedownload/install', {
+            download_url: downloadUrl,
+            name: filename || displayName + '.nam',
+            display_name: displayName,
+            size: size,
+        });
+        markInstalled(downloadUrl);
+        btn.textContent = '✓ Done';
+        btn.style.background = 'var(--success)';
+        btn.style.borderColor = 'var(--success)';
+        // Refresh model list
+        loadModels();
+    } catch (e) {
+        btn.disabled = false;
+        btn.textContent = 'Install';
+        alert('Install failed: ' + e.message);
+    }
+}
+
+async function installToneIR(downloadUrl, displayName, size, filename) {
+    const btn = event.target;
+    btn.disabled = true;
+    btn.textContent = 'Downloading...';
+
+    try {
+        const data = await apiPost('/irs/tonedownload/install', {
+            download_url: downloadUrl,
+            name: filename || displayName + '.wav',
+            display_name: displayName,
+            size: size,
+        });
+        markInstalled(downloadUrl);
+        btn.textContent = '✓ Done';
+        btn.style.background = 'var(--success)';
+        btn.style.borderColor = 'var(--success)';
+        loadIRs();
+    } catch (e) {
+        btn.disabled = false;
+        btn.textContent = 'Install';
+        alert('Install failed: ' + e.message);
+    }
+}
\ No newline at end of file
diff --git a/src/web/static/style.css b/src/web/static/style.css
index a964bef..67220be 100644
--- a/src/web/static/style.css
+++ b/src/web/static/style.css
@@ -994,4 +994,131 @@ body {
 
 .bt-midi-device code {
     font-size: 0.72rem;
+}
+
+/* ── Tone3000 Downloader ──────────────────────────────────────────── */
+
+.badge-tone3000 {
+    background: linear-gradient(135deg, #0000FF, #FF0000);
+    color: white;
+    font-size: 0.65rem;
+    vertical-align: middle;
+    margin-left: 6px;
+}
+
+.tonedownload-search-row {
+    display: flex;
+    gap: 8px;
+    margin-bottom: 10px;
+    align-items: center;
+}
+
+.tonedownload-input {
+    flex: 1;
+    min-width: 0;
+    padding: 8px 10px;
+    border: 1px solid var(--border);
+    border-radius: var(--radius-sm);
+    background: var(--bg-secondary);
+    color: var(--text-primary);
+    font-size: 0.85rem;
+}
+
+.tonedownload-input::placeholder {
+    color: var(--text-muted);
+}
+
+.tonedownload-offline {
+    padding: 10px;
+    background: rgba(255, 167, 38, 0.1);
+    border: 1px solid var(--warning);
+    border-radius: var(--radius-sm);
+    color: var(--warning);
+    font-size: 0.82rem;
+    margin-bottom: 10px;
+}
+
+.tonedownload-results {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.tonedownload-card {
+    display: flex;
+    gap: 10px;
+    padding: 10px;
+    background: var(--bg-secondary);
+    border: 1px solid var(--border);
+    border-radius: var(--radius-sm);
+    align-items: center;
+}
+
+.tonedownload-card.installed {
+    border-color: var(--success);
+    opacity: 0.8;
+}
+
+.tonedownload-thumb {
+    width: 48px;
+    height: 48px;
+    border-radius: var(--radius-sm);
+    object-fit: cover;
+    flex-shrink: 0;
+    background: var(--bg-card);
+}
+
+.tonedownload-thumb-placeholder {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 1.3rem;
+}
+
+.tonedownload-card-body {
+    flex: 1;
+    min-width: 0;
+}
+
+.tonedownload-card-name {
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: var(--text-primary);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.tonedownload-card-meta {
+    font-size: 0.72rem;
+    color: var(--text-muted);
+    margin-top: 2px;
+}
+
+.tonedownload-card-desc {
+    font-size: 0.72rem;
+    color: var(--text-secondary);
+    margin-top: 4px;
+    line-height: 1.3;
+    display: -webkit-box;
+    -webkit-line-clamp: 2;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+}
+
+.tonedownload-card-actions {
+    flex-shrink: 0;
+}
+
+.tonedownload-install-btn {
+    padding: 4px 12px;
+    font-size: 0.78rem;
+}
+
+.tonedownload-installed-badge {
+    display: inline-block;
+    color: var(--success);
+    font-size: 0.78rem;
+    font-weight: 600;
+    white-space: nowrap;
 }
\ No newline at end of file
diff --git a/src/web/templates/irs.html b/src/web/templates/irs.html
index ca7c59a..5118765 100644
--- a/src/web/templates/irs.html
+++ b/src/web/templates/irs.html
@@ -42,6 +42,26 @@
             <button class="btn btn-primary" onclick="uploadIR()">Upload</button>
         </div>
     </div>
+
+    <div class="card">
+        <div class="card-header">
+            <h2>Browse Tone3000 <span class="badge badge-tone3000">BETA</span></h2>
+        </div>
+        <div class="card-body">
+            <p class="hint">Search and download impulse responses directly from the Tone3000 community.</p>
+            <div class="tonedownload-search-row">
+                <input type="text" id="ir-tone-search" class="file-input tonedownload-input"
+                       placeholder="Search IRs (e.g. Celestion V30)..." onkeydown="if(event.key==='Enter')searchToneIRs()">
+                <button class="btn btn-primary" onclick="searchToneIRs()">Search</button>
+                <button class="btn btn-secondary" onclick="loadTrendingIRs()">Trending</button>
+            </div>
+            <div id="ir-tone-loader" class="loading" style="display:none">Searching Tone3000...</div>
+            <div id="ir-tone-offline" class="tonedownload-offline" style="display:none">
+                <span>⚠ Offline — search unavailable</span>
+            </div>
+            <div id="ir-tone-results" class="tonedownload-results"></div>
+        </div>
+    </div>
 </div>
 {% endblock %}
 {% block scripts %}
diff --git a/src/web/templates/models.html b/src/web/templates/models.html
index 5d9fdf6..fb65fb9 100644
--- a/src/web/templates/models.html
+++ b/src/web/templates/models.html
@@ -42,6 +42,26 @@
             <button class="btn btn-primary" onclick="uploadModel()">Upload</button>
         </div>
     </div>
+
+    <div class="card">
+        <div class="card-header">
+            <h2>Browse Tone3000 <span class="badge badge-tone3000">BETA</span></h2>
+        </div>
+        <div class="card-body">
+            <p class="hint">Search and download NAM models directly from the Tone3000 community.</p>
+            <div class="tonedownload-search-row">
+                <input type="text" id="model-tone-search" class="file-input tonedownload-input"
+                       placeholder="Search models (e.g. Marshall JCM800)..." onkeydown="if(event.key==='Enter')searchToneModels()">
+                <button class="btn btn-primary" onclick="searchToneModels()">Search</button>
+                <button class="btn btn-secondary" onclick="loadTrendingModels()">Trending</button>
+            </div>
+            <div id="model-tone-loader" class="loading" style="display:none">Searching Tone3000...</div>
+            <div id="model-tone-offline" class="tonedownload-offline" style="display:none">
+                <span>⚠ Offline — search unavailable</span>
+            </div>
+            <div id="model-tone-results" class="tonedownload-results"></div>
+        </div>
+    </div>
 </div>
 {% endblock %}
 {% block scripts %}
diff --git a/tests/test_tonedownload.py b/tests/test_tonedownload.py
new file mode 100644
index 0000000..095edf7
--- /dev/null
+++ b/tests/test_tonedownload.py
@@ -0,0 +1,677 @@
+"""Tests for the Tone3000 downloader client.
+
+Tests use mocked HTTP responses so no network access is needed.
+The Web UI integration tests cover the /api/models/tonedownload/* and
+/api/irs/tonedownload/* endpoints via the TestClient.
+
+Run with:
+    pytest tests/test_tonedownload.py -v
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from src.system.tonedownload import (
+    Tone3000Client,
+    ModelResult,
+    IRResult,
+    format_size,
+    discover_anon_key,
+    CACHE_TTL,
+)
+
+# ── Test constants ─────────────────────────────────────────────────────
+
+FAKE_ANON_KEY = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.test"
+
+SAMPLE_MODEL_ROW = {
+    "id": 1,
+    "name": "Marshall JCM800",
+    "model_url": "https://api.tone3000.com/storage/v1/object/public/models/test.nam",
+    "size": 512000,
+    "pack_name": "Marshall Pack",
+    "user_id": "u1",
+    "tone_id": 10,
+    "architecture_version": "1",
+    "created_at": "2025-01-01T00:00:00Z",
+}
+
+SAMPLE_TONE_ROW = {
+    "id": 10,
+    "title": "Marshall JCM800 Sound",
+    "description": "Classic rock tone",
+    "gear": "amp",
+    "images": ["https://example.com/thumb.jpg"],
+}
+
+SAMPLE_IR_TONE_ROW = {
+    "id": 20,
+    "title": "V30 Cabinet",
+    "description": "4x12 V30 IR",
+    "gear": "ir",
+    "images": [],
+}
+
+SAMPLE_IR_MODEL_ROW = {
+    "id": 100,
+    "name": "v30_cabinet.wav",
+    "model_url": "https://api.tone3000.com/storage/v1/object/public/models/v30.wav",
+    "size": 256000,
+    "user_id": "u2",
+    "tone_id": 20,
+    "created_at": "2025-02-01T00:00:00Z",
+}
+
+SAMPLE_USER_ROW = {
+    "id": "u1",
+    "username": "testuser",
+    "avatar_url": "https://example.com/avatar.png",
+    "display_name": "Test User",
+}
+
+
+# ── Fixtures ───────────────────────────────────────────────────────────
+
+
+@pytest.fixture
+def mock_session():
+    """Create a mock aiohttp.ClientSession that returns empty lists by default."""
+    session = MagicMock()
+    resp = MagicMock()
+    resp.status = 200
+    resp.json = AsyncMock(return_value=[])
+    resp.text = AsyncMock(return_value="[]")
+    resp.__aenter__ = AsyncMock(return_value=resp)
+    resp.__aexit__ = AsyncMock(return_value=None)
+    session.get = MagicMock(return_value=resp)
+    session.closed = False
+    session.close = AsyncMock()
+    return session
+
+
+@pytest.fixture
+def client(mock_session):
+    """Tone3000Client with a mocked session and known anon key."""
+    c = Tone3000Client(anon_key=FAKE_ANON_KEY, session=mock_session)
+    yield c
+    # Teardown: ensure close is called if the test doesn't
+    if c._session and not c._session.closed:
+        pass  # tests manage session lifecycle
+
+
+# ── Data class tests ───────────────────────────────────────────────────
+
+
+class TestModelResult:
+    def test_basic_attributes(self):
+        m = ModelResult(id=1, name="test.nam", download_url="https://example.com/test.nam")
+        assert m.id == 1
+        assert m.filename == "test.nam"
+        assert m.display_name == "test.nam"
+        assert m.is_ir is False
+        assert m.thumbnail_url is None
+
+    def test_with_tone_title(self):
+        m = ModelResult(
+            id=1,
+            name="test.nam",
+            download_url="https://example.com/test.nam",
+            tone_title="My Tone",
+        )
+        assert m.display_name == "My Tone"
+
+    def test_with_images(self):
+        m = ModelResult(
+            id=1,
+            name="test.nam",
+            download_url="https://example.com/test.nam",
+            tone_images=["https://example.com/thumb.jpg"],
+        )
+        assert m.thumbnail_url == "https://example.com/thumb.jpg"
+
+    def test_wav_is_ir(self):
+        m = ModelResult(id=1, name="ir.wav", download_url="https://example.com/ir.wav")
+        assert m.is_ir is True
+
+    def test_ir_flag_from_gear(self):
+        m = ModelResult(id=1, name="test.wav", download_url="https://example.com/test.wav", tone_gear="ir")
+        assert m.is_ir is True
+
+
+class TestIRResult:
+    def test_basic_attributes(self):
+        ir = IRResult(id=1, name="ir.wav", download_url="https://example.com/ir.wav")
+        assert ir.is_ir is True
+
+    def test_sample_rate(self):
+        ir = IRResult(id=1, name="ir.wav", download_url="https://example.com/ir.wav", sample_rate=48000)
+        assert ir.sample_rate == 48000
+        assert ir.is_ir is True
+
+
+# ── format_size tests ──────────────────────────────────────────────────
+
+
+class TestFormatSize:
+    def test_none(self):
+        assert format_size(None) == "Unknown"
+
+    def test_bytes(self):
+        assert format_size(500) == "0.5 KB"
+
+    def test_megabytes(self):
+        assert format_size(2 * 1024 * 1024) == "2.0 MB"
+
+    def test_large_megabytes(self):
+        assert format_size(15 * 1024 * 1024) == "15.0 MB"
+
+    def test_edge_kb(self):
+        assert format_size(1023) == "1.0 KB"
+
+    def test_edge_mb(self):
+        assert format_size(1024 * 1024) == "1.0 MB"
+
+
+# ── Client initialization ──────────────────────────────────────────────
+
+
+class TestClientInit:
+    def test_default_anon_key(self):
+        """Should use the hardcoded constant when no key provided."""
+        c = Tone3000Client()
+        assert c._anon_key is not None
+        assert len(c._anon_key) > 50
+
+    def test_custom_anon_key(self):
+        c = Tone3000Client(anon_key=FAKE_ANON_KEY)
+        assert c._anon_key == FAKE_ANON_KEY
+
+    def test_custom_dirs(self):
+        models_dir = Path("/tmp/test-models")
+        irs_dir = Path("/tmp/test-irs")
+        c = Tone3000Client(
+            anon_key=FAKE_ANON_KEY,
+            models_dir=models_dir,
+            irs_dir=irs_dir,
+        )
+        assert c._models_dir == models_dir
+        assert c._irs_dir == irs_dir
+
+
+# ── Session management ─────────────────────────────────────────────────
+
+
+class TestSession:
+    def test_get_session_creates_if_none(self, client):
+        client._session = None
+        assert client._session is None
+        assert client._anon_key == FAKE_ANON_KEY
+
+    @pytest.mark.asyncio
+    async def test_close_no_session(self, client):
+        client._session = None
+        await client.close()
+
+    @pytest.mark.asyncio
+    async def test_close_closed_session(self, client, mock_session):
+        mock_session.closed = True
+        await client.close()
+
+
+# ── Caching ────────────────────────────────────────────────────────────
+
+
+class TestCaching:
+    def test_cache_miss(self, client):
+        assert client._get_cached("test:key") is None
+
+    def test_cache_hit(self, client):
+        data = [{"id": 1, "name": "test"}]
+        client._set_cache("test:key", data)
+        result = client._get_cached("test:key")
+        assert result == data
+
+    def test_cache_expiry(self, client):
+        data = [{"id": 1}]
+        client._set_cache("test:expire", data)
+        client._cache["test:expire"] = (0.0, data)
+        assert client._get_cached("test:expire") is None
+
+
+# ── API calls (mocked) ─────────────────────────────────────────────────
+
+
+class TestSupabaseGet:
+    @pytest.mark.asyncio
+    async def test_success(self, client):
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.json = AsyncMock(return_value=[{"id": 1}])
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        result = await client._supabase_get("models", {"limit": "1"})
+        assert result == [{"id": 1}]
+
+    @pytest.mark.asyncio
+    async def test_error_status(self, client):
+        mock_resp = MagicMock()
+        mock_resp.status = 500
+        mock_resp.text = AsyncMock(return_value="Internal error")
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        result = await client._supabase_get("models")
+        assert result == []
+
+    @pytest.mark.asyncio
+    async def test_network_error(self, client):
+        from aiohttp import ClientError
+
+        client._session.get = MagicMock(side_effect=ClientError("Connection refused"))
+
+        result = await client._supabase_get("models")
+        assert result == []
+
+    @pytest.mark.asyncio
+    async def test_single_object_response(self, client):
+        """Should wrap a single object in a list."""
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.json = AsyncMock(return_value={"id": 1})
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        result = await client._supabase_get("models", {"id": "eq.1"})
+        assert result == [{"id": 1}]
+
+
+# ── Ping ───────────────────────────────────────────────────────────────
+
+
+class TestPing:
+    @pytest.mark.asyncio
+    async def test_online(self, client):
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.json = AsyncMock(return_value=[{"id": 1}])
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        assert await client.ping() is True
+
+    @pytest.mark.asyncio
+    async def test_offline(self, client):
+        from aiohttp import ClientError
+
+        client._session.get = MagicMock(side_effect=ClientError("Timeout"))
+        assert await client.ping() is False
+
+
+# ── Search ─────────────────────────────────────────────────────────────
+
+
+class TestSearchModels:
+    @pytest.mark.asyncio
+    async def test_search_returns_results(self, client):
+        async def mock_get(path, params=None):
+            if path == "models" and params and "name" in params:
+                return [SAMPLE_MODEL_ROW]
+            if path == "users":
+                return [SAMPLE_USER_ROW]
+            if path == "tones":
+                return [SAMPLE_TONE_ROW]
+            return []
+
+        client._supabase_get = mock_get
+
+        results = await client.search_models("marshall", page=0)
+        assert len(results) == 1
+        assert results[0].name == "Marshall JCM800"
+        assert results[0].display_name == "Marshall JCM800 Sound"
+        assert results[0].author_username == "testuser"
+
+    @pytest.mark.asyncio
+    async def test_search_cached(self, client):
+        call_count = 0
+
+        async def mock_get(path, params=None):
+            nonlocal call_count
+            call_count += 1
+            if path == "models":
+                return [SAMPLE_MODEL_ROW]
+            if path == "users":
+                return [SAMPLE_USER_ROW]
+            if path == "tones":
+                return [SAMPLE_TONE_ROW]
+            return []
+
+        client._supabase_get = mock_get
+
+        await client.search_models("marshall")
+        first_count = call_count
+
+        await client.search_models("marshall")
+        assert call_count == first_count
+
+    @pytest.mark.asyncio
+    async def test_force_refresh(self, client):
+        call_count = 0
+
+        async def mock_get(path, params=None):
+            nonlocal call_count
+            call_count += 1
+            if path == "models":
+                return [SAMPLE_MODEL_ROW]
+            if path == "users":
+                return [SAMPLE_USER_ROW]
+            if path == "tones":
+                return [SAMPLE_TONE_ROW]
+            return []
+
+        client._supabase_get = mock_get
+
+        await client.search_models("marshall")
+        await client.search_models("marshall", force_refresh=True)
+        assert call_count >= 2
+
+    @pytest.mark.asyncio
+    async def test_empty_query(self, client):
+        results = await client.search_models("nonexistent_xyz123", page=0)
+        assert isinstance(results, list)
+
+
+class TestSearchIRs:
+    @pytest.mark.asyncio
+    async def test_search_returns_results(self, client):
+        async def mock_get(path, params=None):
+            if path == "tones" and "ir" in str(params.get("gear", "")):
+                return [SAMPLE_IR_TONE_ROW]
+            if path == "models":
+                return [SAMPLE_IR_MODEL_ROW]
+            if path == "users":
+                return [{"id": "u2", "username": "irtest", "avatar_url": None, "display_name": None}]
+            return []
+
+        client._supabase_get = mock_get
+
+        results = await client.search_irs("v30", page=0)
+        assert len(results) >= 1
+        assert results[0].is_ir is True
+        assert results[0].tone_title == "V30 Cabinet"
+
+    @pytest.mark.asyncio
+    async def test_empty_results(self, client):
+        async def mock_get(path, params=None):
+            if path == "tones":
+                return []
+            return []
+
+        client._supabase_get = mock_get
+
+        results = await client.search_irs("nonexistent_ir", page=0)
+        assert results == []
+
+
+# ── Trending ───────────────────────────────────────────────────────────
+
+
+class TestTrending:
+    @pytest.mark.asyncio
+    async def test_trending_models(self, client):
+        async def mock_get(path, params=None):
+            if path == "models":
+                return [SAMPLE_MODEL_ROW]
+            if path == "users":
+                return [SAMPLE_USER_ROW]
+            if path == "tones":
+                return [SAMPLE_TONE_ROW]
+            return []
+
+        client._supabase_get = mock_get
+        results = await client.get_trending_models(limit=3)
+        assert len(results) == 1
+
+    @pytest.mark.asyncio
+    async def test_trending_irs(self, client):
+        async def mock_get(path, params=None):
+            if path == "tones":
+                return [SAMPLE_IR_TONE_ROW]
+            if path == "models":
+                return [SAMPLE_IR_MODEL_ROW]
+            if path == "users":
+                return [{"id": "u2", "username": "irtest", "avatar_url": None}]
+            return []
+
+        client._supabase_get = mock_get
+        results = await client.get_trending_irs(limit=3)
+        assert len(results) == 1
+
+
+# ── Download ───────────────────────────────────────────────────────────
+
+
+class TestDownload:
+    @pytest.mark.asyncio
+    async def test_download_model_success(self, client, tmp_path):
+        client._models_dir = tmp_path
+
+        async def _chunks():
+            yield b"testdata"
+
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.headers = {"Content-Length": "9"}
+        mock_resp.content = MagicMock()
+        mock_resp.content.iter_chunked = MagicMock(side_effect=lambda cs: _chunks())
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        model = ModelResult(id=1, name="test_model", download_url="https://example.com/test.nam")
+        path = await client.download_model(model)
+        assert path is not None
+        assert path.exists()
+        assert path.suffix == ".nam"
+        assert path.read_bytes() == b"testdata"
+
+    @pytest.mark.asyncio
+    async def test_download_model_no_url(self, client):
+        model = ModelResult(id=1, name="test", download_url="")
+        path = await client.download_model(model)
+        assert path is None
+
+    @pytest.mark.asyncio
+    async def test_download_model_http_error(self, client, tmp_path):
+        client._models_dir = tmp_path
+        mock_resp = MagicMock()
+        mock_resp.status = 404
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        model = ModelResult(id=1, name="test", download_url="https://example.com/test.nam")
+        path = await client.download_model(model)
+        assert path is None
+
+    @pytest.mark.asyncio
+    async def test_download_ir_success(self, client, tmp_path):
+        client._irs_dir = tmp_path
+
+        async def _chunks():
+            yield b"wavdata"
+
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.headers = {"Content-Length": "9"}
+        mock_resp.content = MagicMock()
+        mock_resp.content.iter_chunked = MagicMock(side_effect=lambda cs: _chunks())
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        ir = IRResult(id=1, name="cabinet", download_url="https://example.com/cabinet.wav")
+        path = await client.download_ir(ir)
+        assert path is not None
+        assert path.exists()
+        assert path.suffix == ".wav"
+        assert path.read_bytes() == b"wavdata"
+
+    @pytest.mark.asyncio
+    async def test_download_progress(self, client, tmp_path):
+        client._models_dir = tmp_path
+
+        async def _chunks():
+            yield b"data1"
+            yield b"data2"
+
+        mock_resp = MagicMock()
+        mock_resp.status = 200
+        mock_resp.headers = {"Content-Length": "12"}
+        mock_resp.content = MagicMock()
+        mock_resp.content.iter_chunked = MagicMock(side_effect=lambda cs: _chunks())
+        mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        progress_values = []
+
+        def cb(ratio):
+            progress_values.append(ratio)
+
+        model = ModelResult(id=1, name="test", download_url="https://example.com/test.nam")
+        path = await client.download_model(model, progress_callback=cb)
+        assert path is not None
+        assert len(progress_values) > 0
+
+
+# ── User/Tone enrichment ──────────────────────────────────────────────
+
+
+class TestEnrichment:
+    @pytest.mark.asyncio
+    async def test_get_user_sync(self, client):
+        """User lookup works (sync test via mock)."""
+        from src.system.tonedownload import Tone3000Client
+
+        c = Tone3000Client(anon_key=FAKE_ANON_KEY)
+        result = await c._get_user("")
+        assert result is None
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_get_tone_sync(self, client):
+        from src.system.tonedownload import Tone3000Client
+
+        c = Tone3000Client(anon_key=FAKE_ANON_KEY)
+        result = await c._get_tone(9999)
+        assert result is None
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_get_user_cached(self, client):
+        async def mock_get(path, params=None):
+            return [SAMPLE_USER_ROW]
+
+        client._supabase_get = mock_get
+        user = await client._get_user("u1")
+        assert user["username"] == "testuser"
+        # Second call — cached
+        user2 = await client._get_user("u1")
+        assert user2["username"] == "testuser"
+
+    @pytest.mark.asyncio
+    async def test_get_user_empty_id(self, client):
+        user = await client._get_user("")
+        assert user is None
+
+    @pytest.mark.asyncio
+    async def test_get_tone_cached(self, client):
+        async def mock_get(path, params=None):
+            return [SAMPLE_TONE_ROW]
+
+        client._supabase_get = mock_get
+        tone = await client._get_tone(10)
+        assert tone["title"] == "Marshall JCM800 Sound"
+        # Second call — cached
+        tone2 = await client._get_tone(10)
+        assert tone2["title"] == "Marshall JCM800 Sound"
+
+
+# ── Anon key discovery ────────────────────────────────────────────────
+
+
+class TestAnonKeyDiscovery:
+    @pytest.mark.asyncio
+    async def test_discover_timeout(self, client):
+        mock_resp = MagicMock()
+        mock_resp.__aenter__ = AsyncMock(side_effect=TimeoutError("Timed out"))
+        mock_resp.__aexit__ = AsyncMock()
+        client._session.get = MagicMock(return_value=mock_resp)
+
+        key = await discover_anon_key(client._session)
+        assert key is None
+
+
+# ── Integration via real HTTP (optional) ───────────────────────────────
+
+
+@pytest.mark.skipif(
+    True,
+    reason="Real HTTP test — enable manually to verify against live Tone3000 API",
+)
+class TestRealHTTP:
+    """Tests that hit the real Tone3000 API."""
+
+    @pytest.mark.asyncio
+    async def test_ping(self):
+        c = Tone3000Client()
+        ok = await c.ping()
+        assert ok is True
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_search_models(self):
+        c = Tone3000Client()
+        results = await c.search_models("marshall", page=0, page_size=5)
+        assert len(results) > 0
+        for r in results:
+            assert r.display_name
+            assert r.download_url
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_search_irs(self):
+        c = Tone3000Client()
+        results = await c.search_irs("v30", page=0, page_size=5)
+        assert len(results) > 0
+        for r in results:
+            assert r.is_ir is True
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_trending_models(self):
+        c = Tone3000Client()
+        results = await c.get_trending_models(limit=5)
+        assert len(results) > 0
+        await c.close()
+
+    @pytest.mark.asyncio
+    async def test_download(self, tmp_path):
+        c = Tone3000Client(models_dir=tmp_path, irs_dir=tmp_path)
+        results = await c.search_models("marshall", page=0, page_size=1)
+        if results:
+            path = await c.download_model(results[0])
+            assert path is not None
+            assert path.exists()
+            assert path.stat().st_size > 1000
+        await c.close()
\ No newline at end of file