Verify any XDR-1 receipt — free, stateless, any issuer

Machine Tool Interface · receipt-verify

$0 / callPaid per call · 0 free tier No signup

Verifies a signed XDR-1 receipt from ANY x402 service: recomputes the canonical digest and recovers the signer, then compares it to the declared signer. Free forever — no account, no quota, no storage (stateless). A valid receipt proves the signer signed that tool call at that timestamp; it does NOT prove funds moved or any business claim.

Honest Scope Guarantee

Deterministic, offline, explainable — no ML, no scraping. The response's scope field states the exact assurance level.

Run in Playground (Free) Buy Card Credits Agent Quickstart

Quickstart & Execution

cURL (Paid-only route — unauthenticated calls return HTTP 402 Payment Required)

curl -X POST https://api.code402.dev/v1/tools/receipt-verify/call \
  -H "content-type: application/json" \
  -d '{"receipt":{"v":"XDR-1","tool":"iban-check","tool_version":"1","input_hash":"0x…","output_hash":"0x…","payer":"0xc59c85e661d34084a7769f955d17fd38254a6235","recipient":"0xc59c85e661d34084a7769f955d17fd38254a6235","amount":"0","nonce":"0x…","ts":0,"tier":"free","signer":"0xa036e2e3e19c6d02f30b3a9eb0acd057e6d9a5c8","signature":"0x…"}}'

This route is paid-only (0 free calls/day); every unauthenticated request returns an HTTP 402 Payment Required challenge with its payment terms. Machines use USDC on Base; card credits (instant Stripe checkout) are enabled in this deployment. Signed XDR-1 receipts authenticate recorded service claims, not independent settlement, delivery or zero-knowledge proofs.

Input Parameters

Field	Type	Meaning & Constraints
`receipt` (REQUIRED)	`string`	The full XDR-1 receipt object: v, tool, tool_version, input_hash, output_hash, payer, recipient, amount, nonce, ts, tier, signer, signature (optional successor/stream_state).

Response Format

Deterministic JSON payload fields: valid, signer_recovered, declared_signer, digest, canonical, scope. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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