Massive's official MCP server (the company formerly known as Polygon.io) gives agents access to its financial market data APIs, including stocks, options, forex and crypto, by searching endpoints, calling the API and querying results. It runs locally after a one-time uv tool install and authenticates with MASSIVE_API_KEY.
Also available as
Connect
- 1Add the server to Codex
codex mcp add massive --env MASSIVE_API_KEY=YOUR_MASSIVE_API_KEY -- mcp_massive
Configs are generated from the publisher's documented endpoint. Check their docs for plan requirements and scopes. New to this? Read the step-by-step tutorial.
Tools 3
search_endpointscall_apiquery_dataThings to ask
- “What was AAPL's closing price for each day last week?”
- “Show the options chain for TSLA expiring next Friday”
- “Get the latest EUR/USD quote”
- “Compare NVDA and AMD daily volume over the past month”