factstore MCP Server: Install & Setup

Install factstore in Claude Code

Claude Code

claude mcp add factstore -e FACTSTORE_DSN=... -- uvx factstore

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore"
      ],
      "env": {
        "FACTSTORE_DSN": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the factstore MCP server do?

A fact store for AI agents, on Postgres: registered attributes, every write citing its evidence.

Is the factstore MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does factstore run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add factstore to Claude Code?

Run: claude mcp add factstore -e FACTSTORE_DSN=... -- uvx factstore

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