{"uid":"cap_Kp2gzsenckllzYLXjDaF2","slug":"synthex-forge-x402-receipt-check-567f7838","name":"Synthex Forge x402 Receipt Check","description":"Synthex Forge x402 Receive: 41 paid verification, attestation and governance endpoints (Ed25519 + SHA-256 signed artifacts) plus free verify/public-key/standard sibling routes. Paid routes answer HTTP 402 with an x402 v2 `payment-required` envelope (atomic USDC on Base mainnet, chain ID 8453). Free routes are declared with `security: []` per the x402scan discovery spec.","url":"https://x402.synthexforge.com/v1/bureau/receipt-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"offer":{"type":"object","description":"The advertised offer the receipt should satisfy"},"receipt":{"type":"object","description":"The payment receipt under test"}}},"responseSchema":{"type":"json","example":{"ok":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zG-OIA2wyeYr3nLptzdRa","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies that a payment receipt satisfies a given offer, returning a signed attestation of validity for x402 micropayment flows on Base mainnet","exampleAgentPrompt":"Can you check whether this payment receipt I got satisfies the offer I advertised — verify it's a valid x402 USDC receipt on Base mainnet before I unlock the resource?","exampleUseCases":[{"title":"Gate API access on receipt validity","prompt":"Before delivering my premium API response, check this x402 receipt against the offer I posted — only proceed if the receipt checks out as a valid USDC payment on Base."},{"title":"Marketplace payment confirmation","prompt":"A buyer just sent me a payment receipt for a $0.05 USDC offer on my marketplace — can you verify the receipt is genuine and matches the offer terms before I ship the digital goods?"},{"title":"Automated paywall enforcement","prompt":"My paywall server received an x402 receipt from a user trying to access a paid article; verify the receipt satisfies the original offer before I grant them access."}],"resultDescription":"Returns a JSON object with an `ok` boolean indicating whether the receipt is valid and satisfies the provided offer. On success, `ok` is true; on failure, `ok` is false, potentially with error details about the mismatch.","failureModes":["Receipt does not match the offer (ok: false)","Malformed receipt or offer object causes a 400 error","Payment was on the wrong chain (not Base mainnet, chain ID 8453)","Expired or already-used receipt returns invalid","402 Payment Required returned if the caller hasn't paid the $0.05 USDC verification fee","Network timeout or upstream signing service unavailable"],"whenToPreferThis":"Choose this endpoint when you need to cryptographically verify that an x402 v2 payment receipt satisfies a specific offer before granting access to a paid resource. It is the right choice when your system acts as a payee receiving USDC on Base mainnet and needs an independent, signed attestation of receipt validity rather than doing on-chain verification yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T01:18:20.941Z","isFirstParty":false,"canonicalSlug":"synthex-forge-x402-receipt-check-567f7838"}