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factstore

io.github.Victor-EU/factstore · v0.1.0

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

Website Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add factstore -e FACTSTORE_DSN=<FACTSTORE_DSN> -e FACTSTORE_EXCISE_DSN=<FACTSTORE_EXCISE_DSN> -- uvx factstore==0.1.0
claude_desktop_config.json
{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore==0.1.0"
      ],
      "env": {
        "FACTSTORE_DSN": "<FACTSTORE_DSN>",
        "FACTSTORE_EXCISE_DSN": "<FACTSTORE_EXCISE_DSN>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "factstore": {
      "command": "uvx",
      "args": [
        "factstore==0.1.0"
      ],
      "env": {
        "FACTSTORE_DSN": "<FACTSTORE_DSN>",
        "FACTSTORE_EXCISE_DSN": "<FACTSTORE_EXCISE_DSN>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "factstore": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "factstore==0.1.0"
      ],
      "env": {
        "FACTSTORE_DSN": "<FACTSTORE_DSN>",
        "FACTSTORE_EXCISE_DSN": "<FACTSTORE_EXCISE_DSN>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
FACTSTORE_DSN
Required, secret		The credential `factstore actor STORE NAME` prints: a Postgres connection string for one actor of one store.
FACTSTORE_EXCISE_DSN
Optional, secret		An excision credential (`factstore actor --excise`). Only then is the excise tool listed.

Details

Package[email protected] (PYPI, stdio)
First published4 Oct 2026
Last updated4 Oct 2026
Registry nameio.github.Victor-EU/factstore

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