# Synthex Forge VeriTrack Attestation

> Synthex Forge VeriTrack Attestation is a paid API for AI agents from x402.synthexforge.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-22).

Submits a claim for cryptographic attestation, returning an Ed25519 + SHA-256 signed artifact that verifies the claim's authenticity on-chain

## Facts

- Endpoint: POST https://x402.synthexforge.com/v1/veritrack/attest?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthex-forge-veritrack-attestation-5db623f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gl2WaOB3asHPMqyR7cn_p

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-veritrack-attestation-5db623f5 -d '<json body>'
```

Example prompt: Attest this compliance claim for me using Synthex Forge VeriTrack — the claim type is 'data_integrity' and the claim object includes our dataset hash and originator ID — I need a signed artifact back.

## When to prefer this

Choose this endpoint when you need a cryptographically signed, Ed25519 + SHA-256 attested artifact for a structured claim — especially in governance, compliance, or audit contexts where tamper-evidence and on-chain verifiability are required. It is preferable over generic signing services when you need a purpose-built attestation API with x402 micropayment access control and a structured claim schema.

## Known failure modes

- HTTP 402 returned if payment header is missing or USDC payment on Base mainnet (chain ID 8453) is insufficient
- Malformed claim object returns validation error
- Unknown or unsupported claim_type may result in rejection
- Network or blockchain settlement delay may cause timeout
- Duplicate or replayed claims may be rejected depending on service configuration

## 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 response with an 'ok' boolean indicating success, along with a cryptographically signed attestation artifact secured with Ed25519 and SHA-256. The artifact provides tamper-evident proof of the submitted claim, suitable for audit, compliance, or governance workflows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "claim": {
   "type": "object"
  },
  "claim_type": {
   "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-veritrack-attestation-5db623f5/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)