{"uid":"cap_6lhthoakU4tsknvMgshMf","slug":"blake2s-256-hex-to-base64-digest-4359d94f","name":"Blake2s-256 Hex-to-Base64 Digest","description":"Call when an agent needs a blake2s256 digest of hex bytes, encoded as base64. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64-rawhex first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2s256-base64-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":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_cL4RAkV2v6_OACnZVvBOi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","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 digest of hex-encoded bytes and returns the result encoded as base64","exampleAgentPrompt":"Can you compute the BLAKE2s-256 hash of these hex bytes '48656c6c6f' and give me the result as base64? Use the key 'mysecretkey'.","exampleUseCases":[{"title":"Integrity check for binary asset","prompt":"I have hex-encoded binary data '89504e470d0a1a0a' and I need to compute a BLAKE2s-256 digest of it encoded as base64 so I can verify it hasn't been tampered with — can you do that?"},{"title":"Keyed HMAC-style digest for protocol","prompt":"Compute a keyed blake2s256 base64 digest of the hex bytes 'deadbeefcafe1234' using the key 'protocol-secret-v2' so I can sign this message for our custom protocol."},{"title":"Fingerprinting raw binary payload","prompt":"I need a blake2s256 base64 fingerprint of these hex bytes 'f0f1f2f3f4f5f6f7f8f9' — no key needed, just the raw digest — so I can deduplicate these payloads in my pipeline."}],"resultDescription":"Returns a base64-encoded BLAKE2s-256 digest of the input hex bytes, optionally keyed with the provided key string. The response is a compact cryptographic hash suitable for integrity verification or fingerprinting.","failureModes":["Invalid hex string input (non-hex characters) — likely returns a 4xx error","Input text or key exceeds maximum length (100,000 and 512 chars respectively) — request rejected","Payment not processed correctly — 402 response requiring USDC payment","Malformed request body — 400 bad request","Service unavailable — 5xx error from upstream"],"whenToPreferThis":"Choose this endpoint when you specifically need a BLAKE2s-256 hash (not SHA-256, BLAKE2b, or MD5) of hex-encoded binary data with the output encoded as base64. It is ideal for cryptographic fingerprinting, data integrity checks, or protocol-level message signing where BLAKE2s is the required algorithm. Prefer the free sandbox endpoint (/v1/sandbox/digest-blake2s256-base64-rawhex) first if available; use this paid endpoint when the sandbox is unavailable or rate-limited.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:19.245Z","isFirstParty":false,"canonicalSlug":"blake2s-256-hex-to-base64-digest-4359d94f"}