{"uid":"cap_Sd3UfUWwYYoh-48QObXgi","slug":"delx-commerce-checksum-meta-api-638954ed","name":"Delx Commerce Checksum Meta API","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/checksum-meta?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"content":{"type":"string","description":"Input field: content."},"algorithm":{"type":"string","description":"Input field: algorithm."}}},"responseSchema":{"type":"json","example":{"ok":true,"hex":"1d6334fef87552e1f9ad7e36ae551606a62973215dcb6f9bcb2e580852febc3c","bytes":10,"empty":false,"schema":"delx/util-checksum-meta/v1","algorithm":"sha256"}},"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_5wuNaB6-UUZP8VY0maRjE","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":"Computes a cryptographic checksum (hash) of input content and returns the hex digest, byte length, and emptiness status.","exampleAgentPrompt":"Can you compute the SHA-256 checksum of this text: 'Hello, world!' and tell me the hex digest, byte length, and whether it's empty?","exampleUseCases":[{"title":"Content integrity check before storage","prompt":"Hash this JSON payload using SHA-256 and give me the hex digest so I can store it alongside the data as a tamper-detection fingerprint: '{\"user\":\"alice\",\"action\":\"login\"}'"},{"title":"Deduplication fingerprinting for agent pipelines","prompt":"Can you compute a SHA-256 checksum of this document chunk so I can tell if I've seen this exact content before? The text is: 'The quick brown fox jumps over the lazy dog.'"},{"title":"Verify content is non-empty before processing","prompt":"Run a checksum on this string using SHA-256 and also tell me if it's empty and how many bytes it is: 'pending_order_12345'"}],"resultDescription":"Returns a JSON object with: ok (boolean success flag), hex (the hex-encoded hash digest), bytes (integer byte length of the input content), empty (boolean indicating if content was empty), schema (a versioned schema identifier), and algorithm (the hash algorithm used, e.g. sha256).","failureModes":["Missing content field returns an error","Unsupported algorithm value may cause a 400 or validation error","Empty content is processed but flagged with empty:true in the response","Network or payment failure returns a 402 or 5xx error","Malformed request body returns a validation error"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call, no-signup cryptographic hash of a string with metadata (byte count, emptiness flag) returned alongside the hex digest — especially in autonomous agent workflows where verifiable, on-chain micropayment billing via USDC/x402 is required. Prefer this over rolling your own hashing when you need an auditable, externally-verifiable checksum with structured metadata output.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:50.006Z","isFirstParty":false,"canonicalSlug":"delx-commerce-checksum-meta-api-638954ed"}