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factstore MCP Server

by victor-eu Your server? Claim it
local only

factstore runs on your own machine — the client starts it, so there is no endpoint to ping. 136 installs a week from pypi. Last commit 4 Oct 2026.

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

Installs per day peak 275 · avg 13 · -51% w/w
a month agotoday
136
Installs / week
pypi · factstore
0
Stars
0 open issues
4 Oct 2026
Last commit
from GitHub
MIT
License
Python

What the code does

We read the source, 6 d ago · rules ccca72095570

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Unsafe deserialization spike/oq1/engine.py:215
    attrs, log = pickle.loads(path.read_bytes())

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Nothing serious here today

Today is the operative word: we check factstore every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add factstore -- uvx factstore
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "factstore": {
      "args": [
        "factstore"
      ],
      "command": "uvx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.factstore]
command = "uvx"
args = ["factstore"]
.cursor/mcp.json
{
  "mcpServers": {
    "factstore": {
      "args": [
        "factstore"
      ],
      "command": "uvx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "factstore": {
      "args": [
        "factstore"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: FACTSTORE_DSN (The credential `factstore actor STORE NAME` prints: a Postgres connection string for one actor of one store.), FACTSTORE_EXCISE_DSN (An excision credential (`factstore actor --excise`). Only then is the excise tool listed.). The author declared them in the registry entry; get the values from the project itself.

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factstore — questions

Answers built from our own checks of this server.

Why is there no uptime for factstore?
factstore runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package factstore was installed 136 times last week.
How do I connect factstore?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls factstore straight from pypi; nothing to host, nothing to sign up for.
How many people use factstore?
The pypi package factstore was installed 136 times in the last week. Week over week that is -51%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is factstore open source?
Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.