@sonarapp/mcp

The official Sonar MCP server — App Store Optimization tools for AI agents.

Lets Claude Desktop, Claude Code, Cursor, Cline, and any Model Context Protocol-compatible client look up apps, research keywords, audit ASO, mine reviews, and estimate revenue across the iOS App Store and Google Play. Powered by Sonar.

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Tools

Read tools — stateless

Tool	What it does
sonar_app_lookup	Look up app metadata by store ID
sonar_app_search	Search apps by keyword (returns store ranking order)
sonar_app_aso_score	ASO audit score (0-100) with itemized checks
sonar_app_extract_keywords	Extract target keywords from an app's listing
sonar_app_reviews	Fetch reviews with rating filters and sort options
sonar_app_revenue	Estimate monthly revenue with methodology
sonar_keyword_search	Keyword research (difficulty, popularity, related terms)
sonar_keyword_metrics	Difficulty + popularity for specific keywords (single or bulk)
sonar_keyword_suggestions	Autocomplete suggestions from the store

Stateless tools work on any plan with credits, with both iOS and Android.

Read tools — your workspace (Full plan)

Tool	What it does
sonar_list_apps	List your tracked apps with latest snapshots (rating, reviews, installs)
sonar_get_app	App detail + up to 90 days of snapshot history
sonar_app_keywords	Keywords tracked for an app, with difficulty + popularity
sonar_app_rankings	Daily rank history for an app's tracked keywords
sonar_app_changes	Detected releases, metadata edits, screenshot/price/category changes
sonar_keyword_rankings	SERP history for a tracked keyword (who ranked, when)
sonar_competitor_keywords	Keywords a competitor ranks for + gap analysis vs your app

Workspace reads require a Full plan (an active trial counts); the default read-scope key is enough.

Write tools (Full plan + write scope)

Tool	What it does
sonar_create_product	Create a product in your Sonar workspace and start tracking its app(s)
sonar_track_app	Link the second-store version (iOS ↔ Android) of an existing product
sonar_track_competitor	Add a competitor app under a product
sonar_track_keywords	Start daily rank tracking for keywords on an app (bulk, idempotent)
sonar_update_keyword_note	Set or clear the note on a tracked keyword
sonar_scan_competitor	Run a keyword discovery scan on a competitor (read results with sonar_competitor_keywords)

Write tools mutate your workspace and require a Full plan (an active trial counts) plus an API key created with the write scope. The server enforces both — without them, calls return a 403 explaining what to fix.

Together these close the loop for agents: set up tracking with the write tools, then read back rankings, changes, and gap analyses with the workspace tools.

Try it free — no API key needed

The server runs without a key in free mode: sonar_app_search, sonar_app_lookup, sonar_app_aso_score, sonar_app_extract_keywords, and sonar_keyword_suggestions share a free allowance of 30 requests/day per IP, and sonar_keyword_metrics (keyword difficulty + popularity) gets 5 keywords/day. Just install it with no env block and ask your agent about ASO. When you hit the limit, the error tells you how to sign up.

Get an API key

For everything else (tracking, rankings, competitors, higher limits) you'll need a Sonar API key — get one at trysonar.app/developers.

The cheapest path is prepaid API credits — packs from $10 (1,000 credits), with 50 free credits on signup and no subscription. Built specifically for this use case. See pricing.

Install

Claude Desktop

Add to your config file (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows):

{
  "mcpServers": {
    "sonar": {
      "command": "npx",
      "args": ["-y", "@sonarapp/mcp"],
      "env": {
        "SONAR_API_KEY": "aso_your_key_here"
      }
    }
  }
}

Restart Claude Desktop. The sonar_* tools will appear in the tool picker.

Claude Code

claude mcp add sonar -e SONAR_API_KEY=aso_your_key_here -- npx -y @sonarapp/mcp

Cursor

Add to ~/.cursor/mcp.json (or your project's .cursor/mcp.json):

{
  "mcpServers": {
    "sonar": {
      "command": "npx",
      "args": ["-y", "@sonarapp/mcp"],
      "env": {
        "SONAR_API_KEY": "aso_your_key_here"
      }
    }
  }
}

Cline / other MCP clients

Most clients use the same command + args + env shape as above. Point the command at npx -y @sonarapp/mcp and pass SONAR_API_KEY in the env.

Configuration

Variable	Required	Default	Description
SONAR_API_KEY	no (free mode without it)	—	Your Sonar API key (aso_...)
SONAR_API_URL	no	https://trysonar.app	Override the API base URL (only used for self-hosting / staging)

Example prompts

"Use Sonar to look up Spotify on iOS in the US store and report its rating, review count, and category."

"Run an ASO audit on com.duolingo on Android and tell me what to fix."

"Research the keyword 'habit tracker' on iOS — give me difficulty, popularity, and 5 related terms with lower difficulty I should consider."

"Pull the 50 most recent 1- and 2-star reviews of 1517783697 on iOS US and group complaints by theme."

"Search 'meditation' on the App Store and estimate monthly revenue for the top 5 results."

Privacy Policy

Full policy: https://trysonar.app/privacy

The MCP server is a thin client around Sonar's REST API — it stores nothing locally and no data is logged by this package itself.

• Data collected: tool inputs (app IDs, keywords, country codes) are sent to Sonar's API over HTTPS to produce results; authenticated requests include your API key as a Bearer token. Sonar logs API requests (endpoint, status, timing) for rate limiting and abuse prevention.
• Data usage: inputs are used solely to serve the request (keyword metrics, app lookups, etc.); resulting JSON is returned to your AI client.
• Storage & retention: the package keeps no state on disk. Server-side request logs are retained for 90 days; workspace data (tracked apps/keywords) persists in your Sonar account until you delete it.
• Third-party sharing: no user data is sold or shared with third parties; queries against public app-store data (Apple, Google) contain no personal information.
• Contact: hello@trysonar.app

Troubleshooting

"SONAR_API_KEY is not set — running in free mode" — Expected if you haven't configured a key: the free tools keep working with per-IP daily limits. If you DID configure a key, the MCP client did not pass the env var through — check the env section of your client's config file. Some clients require an absolute path to npx — try which npx and use that.

"Authentication failed" — Your key is invalid, expired, or your subscription lapsed. Visit trysonar.app/developers to check.

"Access denied. Endpoint may require Full plan" — The 9 stateless read tools work on any plan with credits. The workspace read tools and write tools require a Full plan (an active trial counts); write tools additionally need an API key created with the write scope. If you're on a setup or trial-expired plan, reactivate first.

Companion: CLI

Prefer the terminal? Use @sonarapp/cli (sonar binary) — same data, same API key.

License

MIT © Peter Sutarik