# Synthex Forge C2PA Manifest Verifier

> Synthex Forge C2PA Manifest Verifier is a paid API for AI agents from x402.synthexforge.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-23).

Verifies a C2PA (Content Authenticity Initiative) manifest against a content hash and expected creator/generator metadata, returning a signed attestation of authenticity

## Facts

- Endpoint: POST https://x402.synthexforge.com/v1/data/c2pa/verify?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthex-forge-c2pa-manifest-verifier-be7107ef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O03_U-NaP1Szm2vzLo6ZJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synthex-forge-c2pa-manifest-verifier-be7107ef -d '<json body>'
```

Example prompt: Check this C2PA manifest for an image I have — the content hash is sha256:abc123def456, I'm expecting the creator to be 'AcmeCorp' and the generator to be 'Adobe Firefly 2.0'. Can you verify the manifest is authentic and hasn't been tampered with?

## When to prefer this

Choose this endpoint when you need cryptographically signed, paid attestation of C2PA manifest authenticity — particularly when the verification result needs to serve as a governance artifact or audit trail. Prefer this over free or unsigned verifiers when downstream compliance, legal, or publishing workflows require a tamper-evident Ed25519-signed attestation record. Best suited for media provenance pipelines, content governance systems, and AI-generated content audit trails.

## Known failure modes

- Manifest does not match content hash — returns ok: false
- Expected creator or generator mismatch — returns ok: false
- Malformed manifest object — likely 400 Bad Request
- Payment not provided or insufficient — returns HTTP 402 with x402 v2 payment-required envelope requesting USDC on Base mainnet (chain ID 8453)
- Network timeout or service unavailability — 5xx error

## How this service works

Synthex Forge x402 Receive: 41 paid verification, attestation and governance endpoints (Ed25519 + SHA-256 signed artifacts) plus free verify/public-key/standard sibling routes. Paid routes answer HTTP 402 with an x402 v2 `payment-required` envelope (atomic USDC on Base mainnet, chain ID 8453). Free routes are declared with `security: []` per the x402scan discovery spec.

## Output

A JSON object with an 'ok' boolean indicating whether the C2PA manifest is valid and matches the provided content hash and expected creator/generator metadata. The response is signed using Ed25519 and SHA-256 as a cryptographic attestation artifact.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "manifest": {
   "type": "object"
  },
  "content_hash": {
   "type": "string"
  },
  "expected_creator": {
   "type": "string"
  },
  "expected_generator": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthex-forge-c2pa-manifest-verifier-be7107ef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.synthexforge.com](https://www.zero.xyz/host/x402.synthexforge.com/llms.txt)