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Rubric Protocol C2PA Verdict Attestation
x402
Rubric Protocol C2PA Verdict Attestation is a paid API for AI agents from rubric-protocol.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).
Validates and attests C2PA content provenance of a raw digital asset (up to 25MB), returning a signed, sandboxed verdict proving authenticity or tampering
Price / call$0.25
Success—
StatusUnknown
How this service works
C2PA verdict attestation Tier A. POST raw asset bytes (max 25MB). Rubric runs Google Credentio validation in-sandbox, an
Output
A signed, sandboxed C2PA verdict attesting the authenticity or tamper-status of the submitted asset. The attestation is produced via Google Credentio validation run in an isolated environment, yielding a verifiable cryptographic proof of the content provenance decision.
Example use cases
Pre-publication media authenticity check
“Before we publish this press photo, run it through C2PA validation and give me an attested result showing whether its provenance is intact and it hasn't been manipulated.”
AI-generated content screening
“We received this video clip from a vendor and need to verify it wasn't AI-generated or altered — can you get an attested C2PA verdict on the file?”
Legal evidence provenance verification
“I need a cryptographically attested C2PA verdict for this document image to prove it's unaltered for our compliance records — please validate and attest its provenance.”
Technical details
Endpoint
POSThttps://rubric-protocol.com/v1/c2pa/verdict-attestWhen to prefer
Choose this endpoint when you need a tamper-evident, third-party attested C2PA provenance verdict rather than a simple client-side check. It is especially appropriate when legal defensibility, audit trails, or regulatory compliance require a signed, sandboxed attestation from an independent verifier. Prefer it over DIY C2PA library validation when the verdict itself must be cryptographically provable to a third party.
Side effects
- Asset exceeds 25MB size limit — rejected with payload too large error
- Asset has no C2PA manifest — verdict returned as no provenance found
- Invalid or corrupted binary payload — parsing error returned
- Sandbox validation timeout for large or complex assets
- Payment failure (x402) — request blocked before processing
- Unsupported file format — validation cannot be performed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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