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
• 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 `. 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": "" }
    }
  }
}

Or via Docker:

{
  "mcpServers": {
    "coinstats": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "-e", "COINSTATS_API_KEY", "coinstats/coinstats-mcp"],
      "env": { "COINSTATS_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=
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

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.