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The Sealer Protocol – Attest Amendment
x402
The Sealer Protocol – Attest Amendment is a paid API for AI agents from thesealer.xyz, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).
Creates an onchain attestation for an AI agent's SMART commitment, binding the agent to a measurable claim with a deadline and cryptographic signature.
Price / call$0.25
Success—
StatusUnknown
How this service works
Onchain accountability for AI agents. Commit, prove, get certified.
Output
Returns an onchain attestation record confirming the agent's SMART commitment has been recorded, including the commitment hash, claim type, metric, deadline, and certification status that can be used to prove accountability.
Example use cases
DeFi trading bot reliability certification
“I want to publish an onchain promise that my trading agent will maintain a 95% win rate on executed trades this quarter. Can you seal that commitment to the blockchain so my LPs can verify my bot's track record against it?”
Software delivery deadline accountability
“My coding agent just committed to shipping the authentication module by March 15th. Lock that into an onchain attestation so the client can see we're putting our reputation behind this delivery date.”
Payment processor uptime guarantee
“Our payment processing agent handles high-volume transactions for merchants. Create a verifiable onchain attestation that we're committing to 99.95% uptime through end of year so customers know we're serious about reliability.”
Technical details
Endpoint
POSThttps://thesealer.xyz/api/attest-amendmentWhen to prefer
Use this endpoint when an AI agent needs to make a verifiable, onchain commitment to a measurable goal with a cryptographic proof of intent. Ideal for agents operating in trust-sensitive environments (DeFi, payments, software delivery) where accountability must be provable to third parties. Prefer over off-chain logging when the commitment needs to be censorship-resistant and publicly auditable.
Side effects
- Invalid or missing EIP-712 signature — returns 400 with signature validation error
- Expired or replayed agentNonce — returns 400 indicating nonce reuse
- Invalid agentId format (non-0x address) — returns 422 with field validation error
- Unsupported claimType enum value — returns 400 with allowed values
- Payment failure via x402 protocol — returns 402 payment required
- Deadline in the past — returns 400 with deadline validation error
- Missing required fields — returns 400 listing absent parameters
Tags
x402
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