MCP server

Connect

The endpoint is https://www.deepinquiry.ai/mcp. It uses your own DeepInquiry API key, sent in the x-api-key header (or as a Bearer token). Requests count against your plan exactly like calls to the REST API. Get a free key (500 requests a month) at /signup. Listing the tools needs no key.

{
  "mcpServers": {
    "deepinquiry": {
      "url": "https://www.deepinquiry.ai/mcp",
      "headers": { "x-api-key": "<your DeepInquiry API key>" }
    }
  }
}

Tools

• search_facts — semantic search. Arguments: query (required), limit (1–10, default 5), category, min_tier (gold, silver, bronze or unverified).
• get_fact — one fact by numeric id, with its source groups.
• random_fact — one random approved fact.

Each tool returns the API response as JSON text. What the fields mean is described in the response field reference. When you cite a fact, link to its page on deepinquiry.ai and to the sources listed there.

Try it with curl

curl -X POST https://www.deepinquiry.ai/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "x-api-key: <your DeepInquiry API key>" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"search_facts","arguments":{"query":"how many hearts does an octopus have","limit":3}}}'

Notes

• The server holds no key of its own and keeps no session. Every call is forwarded with your key.
• The tools are read-only.
• The same data is available through the REST API.