factstore MCP Server

by victor-euio.github.Victor-EU/factstorev0.1.0

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

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Active5d ago

Install factstore MCP server

claude mcp add factstore -e FACTSTORE_DSN='<factstore-dsn>' -e FACTSTORE_EXCISE_DSN='<factstore-excise-dsn>' -- uvx factstore mcp

{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore",
        "mcp"
      ],
      "env": {
        "FACTSTORE_DSN": "<factstore-dsn>",
        "FACTSTORE_EXCISE_DSN": "<factstore-excise-dsn>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore",
        "mcp"
      ],
      "env": {
        "FACTSTORE_DSN": "<factstore-dsn>",
        "FACTSTORE_EXCISE_DSN": "<factstore-excise-dsn>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "factstore": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "factstore",
        "mcp"
      ],
      "env": {
        "FACTSTORE_DSN": "<factstore-dsn>",
        "FACTSTORE_EXCISE_DSN": "<factstore-excise-dsn>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore",
        "mcp"
      ],
      "env": {
        "FACTSTORE_DSN": "<factstore-dsn>",
        "FACTSTORE_EXCISE_DSN": "<factstore-excise-dsn>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
FACTSTORE_DSN	yes	yes	The credential `factstore actor STORE NAME` prints: a Postgres connection string for one actor of one store.
FACTSTORE_EXCISE_DSN	—	yes	An excision credential (`factstore actor --excise`). Only then is the excise tool listed.

Freshness

Active — last maintenance signal 5d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-04 · 5d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-04 · 5d ago · official registry · v0.1.0

FAQ

›How do I install the factstore MCP server in Claude Code?

Run: claude mcp add factstore -e FACTSTORE_DSN='<factstore-dsn>' -e FACTSTORE_EXCISE_DSN='<factstore-excise-dsn>' -- uvx factstore mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does factstore require an API key?

Yes. It expects FACTSTORE_DSN, FACTSTORE_EXCISE_DSN, of which 2 are secrets.

›Can I use factstore as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is factstore in the official MCP registry?

Yes, as io.github.Victor-EU/factstore.