{"uid":"cap_gLIqBXf5FiyQXpTSqYJli","slug":"delx-commerce-x402-challenge-version-check-5bc84983","name":"Delx Commerce — X402 Challenge Version Check","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/x402-challenge-version-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"version":{"type":"integer","description":"Version supplied to X402 Challenge Version Check; used only for this bounded calculation and processed in memory without retention."},"supported_versions":{"type":"array","items":{"type":"integer"},"maxItems":256,"description":"Supported Versions supplied to X402 Challenge Version Check; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"version":2,"supported":true,"supported_versions":[1,2]},"schema":"delx/util-x402-challenge-version-check/v1","status":"pass","evidence":{"retained":false,"input_sha256":"19a97d5b88dfc156ec9b3f1ff4cfb324dd9d18bb96d5ff480a3478193db0eeab","external_calls":0},"operation":"delivery_contract:x402_challenge_version_check"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1lnzhglMhy2TUDWWKsNtH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given x402 protocol version is supported among a list of supported versions, returning a verifiable result with cryptographic evidence.","exampleAgentPrompt":"Check if x402 version 2 is supported among versions [1, 2, 3] and give me a verifiable result with evidence.","exampleUseCases":[{"title":"Version negotiation before payment","prompt":"Before I initiate an x402 payment, check if version 2 is compatible with the supported versions [1, 2] and return proof that the check was done without retaining my data."},{"title":"Protocol compatibility audit","prompt":"I need to verify that x402 challenge version 1 is included in the supported versions list [1, 2, 3, 4] and get back a SHA-256 evidence hash I can log for compliance."},{"title":"Agent handshake version check","prompt":"My agent needs to confirm x402 version 3 is supported among [1, 2, 3] before proceeding — can you run the version check and return the full result including whether it passed?"}],"resultDescription":"Returns a JSON object containing: the matched version integer, a boolean indicating if it is supported, the full list of supported versions, a pass/fail status, the operation name, the schema identifier, and an evidence block with a SHA-256 hash of the input, a flag confirming no data was retained, and a count of zero external calls made.","failureModes":["Version integer not found in supported_versions list — returns supported: false","Malformed input (non-integer version or array exceeding 256 items) — likely 400 Bad Request","Payment not completed via x402 — 402 Payment Required before result is returned","Empty supported_versions array — result may return supported: false with no match"],"whenToPreferThis":"Use this endpoint when an AI agent or payment system needs a cheap, verifiable, tamper-evident check of x402 protocol version compatibility — especially when cryptographic evidence of the computation (input hash, no retention, no external calls) is required for audit or compliance. Prefer this over a local check when you need an on-chain-payable, verifiable delivery proof rather than a simple in-process comparison.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T01:25:30.936Z","isFirstParty":false,"canonicalSlug":"delx-commerce-x402-challenge-version-check-5bc84983"}