N0N4 Guardian

com.n0n4Published by n0n4.comv1.0.0Updated Oct 29, 2026

C2PA sign/verify for AI agents, prompt-injection scanning, and signed M2M custody handoffs.

VerifiedSTDIODesktop onlySecurity & MonitoringAI & ML

Overview

AI-generated overview

Local desktop MCP server for C2PA content signing and verification, prompt-injection scanning, and signed machine-to-machine custody handoffs.

What you can do
  • Sign and verify content with C2PA provenance metadata.
  • Scan inputs for prompt-injection attempts.
  • Perform signed machine-to-machine custody handoffs between agents.
  • The manifest lists no individual tools, so exact operations are not documented here.
When to use it
Consider it when an assistant needs to attach or check provenance signatures on content, screen incoming text for prompt injection, or pass custody of material between agents with a signed record.
Requirements
Runs as a local process over stdio on a desktop machine; not available as a web executable. No packages, environment variables, headers, or authentication are declared, so setup details are undocumented.
Before you install
Signing and custody handoffs imply cryptographic keys and write actions, but the input declares no credentials or key handling, so confirm where keys are stored and what gets signed before use. Prompt-injection scanning results should not be treated as a guarantee.

Installation

In SourceWeft

  1. Open N0N4 Guardian 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.

Tools

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

Version history

1
  1. v1.0.0LatestOct 29, 2026

Score

15% 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

    Publish an icon in the registry entry.

  • 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.