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Synthex Forge — x402 Paid Agent Services

Signed Attest

signed_attest
Read-onlyIdempotent

Create 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

TableJSON Schema
NameRequiredDescriptionDefault
claimYes
claim_typeNotrack-record

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed6 schema fields changed
    • addedInput schema / properties / claim / additionalProperties
      Added value: +true
    • removedInput schema / properties / claim / description
      Removed value: -"The record to attest."
    • addedInput schema / properties / claim / title
      Added value: +"Claim"
    • addedInput schema / properties / claim / type
      Added value: +"object"
    • addedInput schema / properties / claim_type
      Added value: +{
      +  "default": "track-record",
      +  "title": "Claim Type",
      +  "type": "string"
      +}
    • changedInput schema / required
      Previous value: -[]New value: +[
      +  "claim"
      +]
  2. First observed

TDQS

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