Finmcp MCP Server

FinMCP - Yahoo Finance MCP server (Cloud) with resilience middleware (circuit breaker, rate limiting, retries, caching) and data quality validation. Exposed over MCP by the finmcp mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.

What it actually does

Production-grade (Cloud) financial data infrastructure for AI assistants with enterprise-grade resilience, comprehensive data quality validation, and production-ready monitoring.

• 15 Financial Data Tools — Stocks, options, crypto, forex, company intelligence, market sentiment
• Circuit Breaker Pattern — Automatic recovery from API failures
• Multi-Strategy Rate Limiting — Token bucket + adaptive + per-endpoint limiting
• Data Quality Scoring — Completeness and integrity validation
• Comprehensive Caching — Graceful fallback with high cache hit ratio (70-90%)
• Streaming HTTP Transport — Run locally or deploy to the cloud (Docker/Railway) for HTTPS access

Adding it to your client

The server ships on npm as @mustafa.ramx/finmcp, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.

Configuration

You will need 2 environment variables: YF_MCP_API_KEY, YOUR_SECRET. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.

Caveats

• It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
• Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
• MCP clients confirm each tool call by default. Leave that on until you have watched what the finmcp mcp server does with a few real requests.

When to reach for it

This sits in the cloud and infrastructure group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. It is maintained by steve-sy; worth a glance at recent repository activity before you build anything load-bearing on it.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.