mtl-c2pa-mcp

MCP server for reading C2PA content provenance manifests from media files — built for Claude Code.

⚠️ Experimental — Early development. The C2PA spec and tooling are still evolving. Don't rely on this for legal evidence or compliance work.

C2PA (Coalition for Content Provenance and Authenticity) is the open standard behind Adobe's Content Credentials and is now embedded in Google Lyria AI-generated MP3s. Each manifest records who created the file, what tool produced it, whether it's AI-generated, what watermarks (e.g. SynthID) were applied, and who signed the claim.

This MCP wraps the official c2pa-python library so Claude can read those manifests in plain language.

Tools

Tool	Description
c2pa_summary	Human-friendly summary: generator, AI flag, actions, ingredients, watermarks, signature
c2pa_read	Full raw manifest store as JSON
c2pa_assertions	List all assertions from the active manifest
c2pa_ingredients	List ingredients (sources used) from the active manifest
c2pa_verify	Signature issuer, validation state, successes & failures
c2pa_scan	Audit a directory: which files carry C2PA, which are AI-generated
c2pa_info	Library version and supported MIME types

Supported formats

The underlying c2pa-python library supports many formats. Most relevant here:

• Audio: MP3, WAV, FLAC, OGG, M4A, AAC
• Image: JPG, PNG, WebP, TIFF, AVIF, HEIC, GIF, SVG
• Video: MP4, MOV, AVI
• Other: PDF

Call c2pa_info for the full live list.

Setup

git clone https://github.com/musictechlab/mtl-c2pa-mcp.git
cd mtl-c2pa-mcp
poetry install

Claude Code configuration

claude mcp add -s user mtl-c2pa -- poetry --directory /path/to/mtl-c2pa-mcp run python -m mtl_c2pa_mcp

Usage examples

Once configured, just ask Claude in natural language.

Quick summary of a Lyria-generated MP3

"What does the C2PA manifest in ~/Downloads/Sovereign_Ascent.mp3 say?"

{
  "file": "/Users/you/Downloads/Sovereign_Ascent.mp3",
  "active_manifest": "urn:c2pa:80faaddf-fe27-1e7d-0ce5-4a70eeba2dd1",
  "generator": {
    "name": "Google C2PA Core Generator Library",
    "version": "916434528:916944653"
  },
  "is_ai_generated": true,
  "digital_source_types": [
    "http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia"
  ],
  "actions": [
    {
      "action": "c2pa.created",
      "digitalSourceType": "http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia",
      "description": "Created by Google Generative AI."
    },
    {
      "action": "c2pa.edited",
      "digitalSourceType": "http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia",
      "description": "Applied imperceptible SynthID watermark."
    }
  ],
  "ingredients_count": 0,
  "watermarks": [
    {
      "label": "c2pa.actions.v2",
      "action": "c2pa.edited",
      "description": "Applied imperceptible SynthID watermark."
    }
  ],
  "signature_issuer": "Google LLC",
  "validation": "valid"
}

Verify a signature

"Is the C2PA signature on track.mp3 valid? Who signed it?"

Audit a music folder

"Scan my ~/Music directory and prepare a list of tracks with info if c2pa is included."

Or in raw JSON form:

{
  "directory": "/Users/you/Downloads",
  "total_files": 12,
  "with_manifest": 3,
  "files": [
    {
      "file": "/Users/you/Downloads/Sovereign_Ascent.mp3",
      "has_manifest": true,
      "generator": {"name": "Google C2PA Core Generator Library", "version": "..."},
      "is_ai_generated": true,
      "digital_source_types": ["http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia"]
    },
    {
      "file": "/Users/you/Downloads/photo.jpg",
      "has_manifest": false
    }
  ]
}

Inspect raw manifest

"Dump the full C2PA manifest store of track.mp3."

Returns the same JSON shape produced by c2patool ./track.mp3 — useful when you need every field.

Why this exists

When Google shipped C2PA in Lyria MP3 downloads in May 2026, it became the first major DSP-adjacent player to embed AI provenance directly in music files. Inspecting those manifests usually means installing the Rust c2patool binary and reading raw JSON. This MCP lets you ask Claude "is this AI-generated?" and get a clean answer — same workflow as mtl-metadata-mcp and mtl-vhc, but for provenance instead of ID3 tags or human-cert registry lookups.

Tech stack

• Python 3.10+
• c2pa-python — Adobe's official Rust-backed Python binding
• MCP SDK (FastMCP)
• Poetry — dependency management

Contributing

See CONTRIBUTING.md.

Security

To report a vulnerability, see SECURITY.md.

License

MIT — see LICENSE.

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