CoinStats MCP Server

Hosted Model Context Protocol server for the CoinStats API. Lets AI agents (Claude, Cursor, Codex, ChatGPT — anything that speaks MCP) read and act on the same crypto data the CoinStats apps use, over a single OAuth-protected HTTPS URL.

There's no API key to copy and no env var to manage: each user authorises the agent against their own CoinStats account in the browser, and the agent gets a per-user token from then on.

Server URL

https://mcp.coinstats.app/mcp

Installation

Claude.ai / Claude Desktop

Settings → Connectors → Add custom connector. Paste the server URL and click Add:

https://mcp.coinstats.app/mcp

A browser window opens at coinstats.app/openapi/consent. Sign in (or recognise your existing session), review the requested access, click Approve.

Cursor

Or add to ~/.cursor/mcp.json manually:

{
  "mcpServers": {
    "coinstats": {
      "url": "https://mcp.coinstats.app/mcp"
    }
  }
}

Restart Cursor; on first call it opens a browser window for the OAuth flow.

Claude Code

claude mcp add coinstats --transport http https://mcp.coinstats.app/mcp

Claude Code opens a browser to authorise. Verify with:

claude mcp list

Codex

codex mcp add only registers the URL; it does not open a browser. Run codex mcp login separately:

codex mcp add coinstats --url https://mcp.coinstats.app/mcp
codex mcp login coinstats

After the login step codex mcp list should show Auth: OAuth for coinstats.

Other MCP clients

Any client that speaks the Streamable HTTP transport with OAuth 2.1 authorization will work. Point it at https://mcp.coinstats.app/mcp — Dynamic Client Registration (RFC 7591) is supported, so no pre-shared client_id is needed.

What you can do

After authorising, your agent can:

• Look up real-time prices, charts and market data for 100,000+ coins
• Read your CoinStats portfolio coins, P/L and performance over time
• Query wallet balances and transactions across 120+ blockchains
• Retrieve cash-flow-adjusted historical P/L for wallets, exchanges, and portfolios over preset or custom calendar ranges
• Compare ticker pricing across 200+ exchanges
• Pull crypto news (latest, trending, filtered by source or topic)

Full tool catalog: https://coinstats.app/api-docs/mcp/tools.

Authentication

Discovery + OAuth flow follows the standard MCP / RFC pattern:

Token transport: Authorization: Bearer <token>. Single coinstats scope today; granular scopes are on the roadmap.

Self-host / stdio fallback (developer mode)

If you want to run the MCP server yourself (no per-user OAuth, just a developer API key), the legacy stdio entry point is published on npm:

npx @coinstats/coinstats-mcp

with COINSTATS_API_KEY set in the env. Wire into a client like this:

{
  "mcpServers": {
    "coinstats": {
      "command": "npx",
      "args": ["-y", "@coinstats/coinstats-mcp"],
      "env": { "COINSTATS_API_KEY": "<YOUR_API_KEY>" }
    }
  }
}

Or via Docker:

{
  "mcpServers": {
    "coinstats": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "-e", "COINSTATS_API_KEY", "coinstats/coinstats-mcp"],
      "env": { "COINSTATS_API_KEY": "<YOUR_API_KEY>" }
    }
  }
}

This path is the right choice for headless / unattended integrations where there's no human to click "Approve". Get a key from the CoinStats API Dashboard.

Architecture

The hosted server is a stateless Cloudflare Worker (~225 KiB / ~41 KiB gzipped) that:

1. Exposes the RFC 9728 + RFC 8414 discovery endpoints.
2. Gates POST /mcp on a Authorization: Bearer … token.
3. Dispatches MCP JSON-RPC (initialize / tools/list / tools/call / ping) without session state.
4. Forwards each tool call to https://openapiv1.coinstats.app carrying the same bearer.

Source: src/worker.ts. Config: wrangler.jsonc.

Local development

The repo ships two entry points:

• src/worker.ts — Cloudflare Worker. Run with wrangler dev (port 8787 by default).
• src/index.ts — stdio server. Run with node dist/index.js after building, or via the published npm package.

# Build the stdio CLI
npm run build

# Run the Worker locally (requires `wrangler login` first)
npm run dev

# Deploy the Worker — needs CLOUDFLARE_ACCOUNT_ID exported in the env
# (the account ID isn't committed to wrangler.jsonc; pull it from the
# Cloudflare dashboard sidebar or the CI deploy job's secrets).
export CLOUDFLARE_ACCOUNT_ID=<your-cf-account-id>
npm run deploy

# Tail production logs
npm run tail

For local Worker development you can override env vars:

wrangler dev --var OAUTH_ISSUER:http://localhost:1337 \
             --var COINSTATS_API_BASE_URL:http://localhost:9999

OpenAI plugin domain verification

The OpenAI plugin submission portal verifies domain ownership by fetching https://mcp.coinstats.app/.well-known/openai-apps-challenge and expecting the token it issued as plain text. The Worker serves the OPENAI_APPS_CHALLENGE env var at that path, and returns 404 when the variable is unset. Set it per deployment, outside the committed config:

wrangler secret put OPENAI_APPS_CHALLENGE

Related

• CoinStats API docs — full REST surface, MCP setup guide, tool catalog
• API dashboard — for stdio-mode users to manage their developer API key

License

MIT — see LICENSE.