{"uid":"cap_VqDUccfNaJmeM3hLbj1Pc","slug":"blake2s-256-hex-digest-5b271d3f","name":"BLAKE2s-256 Hex Digest","description":"Call when an agent needs a blake2s256 digest of text, encoded as hex. No network and no LLM. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-hex first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2s256-hex?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"key":{"type":"string","maxLength":512,"minLength":1,"description":"HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored."},"text":{"type":"string","examples":["hello"],"maxLength":100000,"minLength":1,"description":"Message to digest. For raw-hex SKUs this is hex bytes; for utf16 or latin1 SKUs it is decoded with that encoding. Otherwise it is UTF-8 text."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sNHSLGZyCOa_nZB8Ah3O3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes a BLAKE2s-256 cryptographic hash of input text and returns it as a lowercase hex-encoded string","exampleAgentPrompt":"Compute the BLAKE2s-256 hash of the text 'Hello, world!' and give me the result as a hex string.","exampleUseCases":[{"title":"Content integrity fingerprinting","prompt":"Hash this document text with BLAKE2s-256 and give me the hex digest so I can use it as a content fingerprint: 'The quick brown fox jumps over the lazy dog.'"},{"title":"Keyed BLAKE2s MAC generation","prompt":"Generate a keyed BLAKE2s-256 hex digest of the message 'user:alice:action:login' using the key 'mysecretkey123'."},{"title":"Deduplication key for cached data","prompt":"I need a BLAKE2s-256 hex hash of this JSON payload to use as a cache key: '{\"userId\":42,\"action\":\"checkout\",\"items\":[1,2,3]}'"}],"resultDescription":"A hex-encoded string representing the 32-byte (256-bit) BLAKE2s digest of the input text. If a key is provided, the result is a keyed BLAKE2s-256 MAC. The response is deterministic and has no external dependencies.","failureModes":["Text or key exceeds maximum length (100,000 or 512 chars respectively) — returns validation error","Missing or empty text field — returns 400-level error","Payment not provided or insufficient USDC — returns 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you need a BLAKE2s-256 hash specifically encoded as hexadecimal, rather than base64 or base64url. Prefer this over SHA-family endpoints when BLAKE2s compatibility is required (e.g. for systems that use BLAKE2s for checksums or MACs). Use the free sandbox endpoint (/v1/sandbox/digest-blake2s256-hex) first to test; use this paid endpoint in production or when the sandbox is unavailable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:27.945Z","isFirstParty":false,"canonicalSlug":"blake2s-256-hex-digest-5b271d3f"}