Signed Attest
signed_attestCreate a signed, tamper-evident track-record attestation (Ed25519 + SHA-256) over any claim.
VALUE: A signed, dated attestation of a claim with a claim type — a standalone 'this is true, and here is when'.
PRICE: $0.25 USDC per call.
HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the X-PAYMENT header, then retry the same call. An unpaid call returns a payment_required payload with the amount, asset, network and payTo already filled in. The synthex-x402 SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| claim | Yes | ||
| claim_type | No | track-record |