massive.com
Massive provides financial market data covering stocks, options, futures, indices, forex, crypto, and related datasets. Its products include on-demand APIs, streaming feeds, bulk historical files, and AI-oriented access through MCP and LLM-friendly documentation.
Massive exposes a REST API at api.massive.com, a WebSocket market-data API, an S3-compatible Flat Files endpoint at files.massive.com, a hosted MCP server at mcp.massive.com, and a self-hostable `mcp_massive` CLI/server; authentication is via Massive-issued API keys, S3 keys, or OAuth depending on surface.
- Massive Remote MCP Serverdiscovered
- Massive REST APIdiscovered
- Massive WebSocket APIdiscovered
- Massive Flat Files S3 endpointdiscovered
- mcp_massive CLIdiscovered
Sign up or log in to Massive, then open the API keys dashboard to copy your API key. Massive docs say the same key is used for REST and WebSocket authentication. Keep it private.
Make sure your Massive subscription includes Flat Files access, then open the Dashboard keys page to obtain your S3 Access Key and Secret Key. Use them together with the S3-compatible endpoint https://files.massive.com and bucket flatfiles.
Create a Massive account via sign up or sign in at Massive login. Then add the remote MCP server https://mcp.massive.com/ in your MCP client and complete the browser-based OAuth sign-in when prompted. Massive's client setup guides state there is no API key to copy for the hosted MCP server.
conventions · 1/8 published
- integrations.json✗
/.well-known/integrations.json - llms.txt✓https://massive.com/llms.txt
- API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✗
/.well-known/oauth-protected-resource - Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing