MCP tool calls are ordinary API calls underneath. They spend the same credits, respect the same plan entitlements, and count against the same rate limits as REST requests — see Plans & credits. A missing or invalid key is rejected with
401 before any data is read.This is the data server. Separately,
https://docs.focusalpha.ai/mcp serves this documentation site itself over MCP (search and read the docs) — no API key required. Connect both if you want an agent that can look up the docs and pull the data.Claude Code
Claude Desktop
Add toclaude_desktop_config.json:
Cursor
Add to.cursor/mcp.json (project) or ~/.cursor/mcp.json (global):
Other clients
Any MCP client that supports the HTTP transport and can attach anAuthorization header works the same way — configure the URL and the header, nothing else is required.
Available tools
Tools map one-to-one onto the REST API. The model can also calllist_datasets and list_coverage at any time to discover what is available and how fresh it is.
Datasets your plan does not include return a clear upgrade message rather than data — the model will tell you which tier a tool needs.
Related pages
Authentication
Creating and managing the API key your MCP client uses.
Plans & credits
What each plan unlocks and how tool calls are metered.