About
A Node.js Express server that exposes the CoinGecko cryptocurrency API via a JSON‑RPC 2.0 MCP interface, supporting both free and Pro endpoints with automatic fallback. Ideal for AI agents needing real‑time market data.
Capabilities

The CoinGecko API Server MCP is a purpose‑built gateway that translates the raw CoinGecko cryptocurrency data API into an AI‑friendly interface. By exposing the full spectrum of CoinGecko’s endpoints through a single, well‑documented RESTful layer and a JSON‑RPC 2.0 endpoint, it removes the friction that normally accompanies direct API consumption in conversational agents. Developers can plug this server into Claude or any other MCP‑compatible assistant and unlock instant, real‑time market data without writing custom wrappers.
At its core, the server solves two common pain points: rate‑limit management and API key handling. It accepts an optional Pro API key, automatically routing requests to the higher‑limit endpoint when available and gracefully falling back to the free tier during development or for users without a key. This dual‑mode operation means that AI assistants can reliably fetch price feeds, market caps, and trending coins regardless of the underlying network constraints. The built‑in error handling further ensures that clients receive clear status codes and descriptive messages, reducing debugging time in production.
Key capabilities include:
- Comprehensive endpoint coverage – from simple price lookups to global market summaries, all exposed via paths and mirrored in the MCP schema at .
- JSON‑RPC 2.0 support – the endpoint accepts structured method calls, allowing agents to invoke specific data requests without constructing URLs manually.
- Automatic environment configuration – a lightweight file and interactive installer make deployment trivial, while the server’s internal logic detects environment variables to configure ports and API keys.
- Robust error reporting – detailed JSON responses with HTTP status codes help assistants surface meaningful feedback to end users.
Real‑world scenarios that benefit from this server include:
- Portfolio trackers – AI agents can pull live prices and market caps to update user dashboards on demand.
- Investment research – agents can query trending coins, market sentiment, and historical data for quick analysis.
- Trading bots – automated strategies can use the MCP to fetch threshold prices and trigger actions without exposing API credentials in code.
- Educational tools – chatbots teaching about cryptocurrencies can retrieve up‑to‑date data on the fly, enhancing interactivity.
Integration into AI workflows is straightforward: after launching the server locally or on a cloud instance, an MCP‑compatible assistant simply registers the server URL (e.g., ). The assistant then discovers available tools via , and can invoke methods such as or through the JSON‑RPC interface. This seamless plug‑and‑play model frees developers from boilerplate, allowing them to focus on higher‑level logic while the server handles authentication, rate limiting, and data normalization.
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