{"uid":"cap_Y7J5SHsS5HuTsXNFLiSd6","slug":"agentshelf-syntexa-ch-blake2s-256-base64url-digest-hex-bytes-54275327","name":"agentshelf.syntexa.ch Blake2s-256 Base64url Digest (Hex Bytes)","description":"Call when an agent needs a blake2s256 digest of hex bytes, encoded as base64url. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64url-rawhex first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2s256-base64url-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":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4engqDS2a6XTeIRvB4Fjb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","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 raw hex-encoded bytes and returns the result encoded as base64url","exampleAgentPrompt":"Can you compute the BLAKE2s-256 hash of the hex bytes 'deadbeef01234567' using the key 'mysecretkey' and give me the result as base64url?","exampleUseCases":[{"title":"Integrity fingerprint for binary payload","prompt":"I have some binary data represented as hex — '0a1b2c3d4e5f' — can you compute a BLAKE2s-256 base64url digest of it using the key 'integrity-check' so I can verify it later?"},{"title":"Keyed MAC for API message signing","prompt":"I need a keyed BLAKE2s-256 digest of the hex string 'cafe0011ff3399aa' using my signing key 'api-secret-v2', encoded as base64url, to include as a message authentication code in my API request."},{"title":"Compact hash for hex-encoded cryptographic nonce","prompt":"Please hash the hex nonce '8f3c72b1d49a0e56' with BLAKE2s-256 using key 'nonce-validator' and return the base64url result so I can store it compactly."}],"resultDescription":"A base64url-encoded BLAKE2s-256 digest string computed over the raw bytes represented by the provided hex input, optionally keyed if a key is supplied.","failureModes":["Invalid hex string input (odd-length or non-hex characters) causing a 4xx error","Key exceeds maximum length of 512 characters resulting in a validation error","Text field exceeds 100,000 character limit causing rejection","Network timeout or 5xx server error during computation","Payment failure or insufficient USDC balance causing a 402 response"],"whenToPreferThis":"Choose this endpoint when you specifically need a BLAKE2s-256 hash of raw binary data supplied as hex, with the output in base64url format, and the free sandbox endpoint (/v1/sandbox/digest-blake2s256-base64url-rawhex) is unavailable or rate-limited. Prefer it over SHA-family hashing endpoints when BLAKE2s speed and compactness matter, and over generic base64 encoding endpoints when a cryptographic digest is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:09.241Z","isFirstParty":false,"canonicalSlug":"agentshelf-syntexa-ch-blake2s-256-base64url-digest-hex-bytes-54275327"}