{"uid":"cap_1EGEZmXrmgqnVucdmBuuM","slug":"agentshelf-blake2s-256-hex-digest-raw-hex-input-a374e0af","name":"AgentShelf Blake2s-256 Hex Digest (Raw Hex Input)","description":"Call when an agent needs a blake2s256 digest of hex bytes, encoded as hex. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-hex-rawhex first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2s256-hex-rawhex?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":["68656c6c6f"],"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":"0.007","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":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GZD9Bmn2-BrX9Q3LSAacq","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes a keyed BLAKE2s-256 hash of raw hex-encoded bytes and returns the digest as a hex string.","exampleAgentPrompt":"Compute the BLAKE2s-256 digest of the hex bytes 'deadbeef0102030405' using the key 'mysecretkey' and give me the result as a hex string.","exampleUseCases":[{"title":"Integrity check for binary data","prompt":"I have this hex-encoded blob '4a6f686e446f65' — can you run a keyed BLAKE2s-256 hash on it using the key 'integritykey' and return the hex digest so I can verify it hasn't been tampered with?"},{"title":"Keyed HMAC-style token generation","prompt":"Generate a BLAKE2s-256 keyed digest of the hex string 'ff00ab1234cd' using the key 'tokenkey99' — I need the result as hex to use as a lightweight authentication token."},{"title":"Checksum for protocol message","prompt":"I'm building a protocol and need a BLAKE2s-256 checksum of the raw hex message '0a1b2c3d4e5f' with the key 'proto-v1' returned as hex — can you compute that?"}],"resultDescription":"A JSON response containing the BLAKE2s-256 hex-encoded digest of the provided hex-encoded input bytes, computed optionally with a provided key string.","failureModes":["Invalid hex input (non-hex characters in text field) returns an error","Key exceeds 512 character limit returns validation error","Input text exceeds 100,000 character limit returns payload-too-large error","Malformed JSON body returns 400 bad request","Payment not included or insufficient USDC causes 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you specifically need BLAKE2s-256 (not SHA-256 or BLAKE2b) over hex-encoded raw bytes with an optional key, and want the result as a hex string. Prefer the free sandbox endpoint (/v1/sandbox/digest-blake2s256-hex-rawhex) first; use this paid version when the sandbox is unavailable or rate-limited. Best for cryptographic integrity checks, keyed authentication tokens, or protocol-level checksums over binary data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:22.427Z","isFirstParty":false,"canonicalSlug":"agentshelf-blake2s-256-hex-digest-raw-hex-input-a374e0af"}