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C2PA Content Provenance Verifier
x402
C2PA Content Provenance Verifier is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).
Verifies the cryptographic C2PA manifest embedded in a media file, checking signature validity and asset integrity against trust lists, returning a provenance verdict with signed claims.
Price / call$0.02
Success—
StatusUnknown
How this service works
Cryptographic C2PA / Content-Credentials verdict for a media file. Parses the embedded manifest, verifies the signature chain and asset hash-binding against the C2PA production + Interim trust lists, and returns a go/no-go verdict (authentic-provenance, untrusted-signer, tampered, unsigned) with the distilled signed claims. Cryptographic provenance, not a deepfake detector.
Output
Returns a verdict string (one of: authentic-provenance, untrusted-signer, tampered, unsigned) along with distilled signed claims extracted from the C2PA manifest, including signer identity, timestamp, and any declared actions or assertions embedded in the credential.
Example use cases
News photo authenticity check
“I received this base64-encoded JPEG from a wire service — can you verify its C2PA manifest and tell me if the signer is on the trusted list and whether the image has been altered since it was signed?”
AI-generated image disclosure audit
“I need to check this PNG file's content credentials to see if C2PA claims indicate it was AI-generated or edited after signing — please run a provenance verification and show me the signed claims.”
PDF document integrity verification
“We got this PDF contract and I want to know if it has a valid C2PA signature from a trusted source and whether the file has been tampered with — can you verify its content provenance using the base64 of the file?”
Technical details
Endpoint
POSThttps://api.agentstools.dev/provenance/verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographic verification of C2PA content credentials embedded in a media file — images, video, audio, or PDF. This is the right choice when you need to know if a file was signed by a known trusted publisher, whether it has been modified after signing, and what provenance claims are asserted. It is NOT a deepfake detector or perceptual authenticity analyzer; it only reads and verifies cryptographic manifests. Prefer this over general metadata inspection tools when you need a standards-compliant, trust-list-backed C2PA verdict.
Side effects
- Unsupported media format — MIME type not in supported list returns an error; check GET /provenance/sources
- No C2PA manifest present — returns 'unsigned' verdict
- Malformed base64 input — parsing failure
- Signature chain broken but file otherwise intact — returns 'tampered'
- Signer not on C2PA production or Interim trust list — returns 'untrusted-signer'
- File too large for inline base64 submission
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| media | string | The media file bytes, base64-encoded (image, video, audio or PDF). A data: URI prefix is tolerated. |
| format | string | Media MIME type or file extension, e.g. image/jpeg, png, mp4, pdf (see GET /provenance/sources for the full list) |
Tags
x402
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