Signato

io.github.Signato-aiPublished by GitHub account Signato-aiv0.13.1Updated Oct 24, 2026

Local confidentiality chamber: blocks the wrong AI output before it leaves the machine.

VerifiedSTDIODesktop onlySecurity & Monitoring

Overview

AI-generated overview

Signato is a local confidentiality chamber that checks AI output against a who-can-know-what matrix before it leaves the machine.

What you can do
Checks outgoing AI output against a local confidentiality matrix before it leaves the machine, blocking output the matrix does not allow. Reads the who-can-know-what rules from a matrix.yaml file whose absolute path is given in JOHARI_GUARD_CONFIG. Returns NOT_CHECKED and points to the quickstart command when no configuration is supplied. Runs as a local process on the user's desktop.
When to use it
Worth adding when an assistant's output may contain information that only certain people are allowed to see, and you want a local check before that output leaves the machine.
Requirements
Runs as a local process on the user's desktop (desktop only, not web executable), installed from the PyPI package signato over stdio. Needs a matrix.yaml file defining who-can-know-what, with its absolute path set in the JOHARI_GUARD_CONFIG environment variable; without it the server answers NOT_CHECKED.
Before you install
The server holds your confidentiality rules, so the matrix.yaml file is sensitive configuration. Without JOHARI_GUARD_CONFIG it does not check anything and reports NOT_CHECKED, so do not treat that state as approval. The manifest lists no tools, so the exact actions and any data handling cannot be verified from the supplied material.

Installation

In SourceWeft

  1. Open Signato in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.13.1LatestSep 16, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.