{"uid":"cap_00rj0R9MhXPWSr50xFliL","slug":"blake2b-512-hex-digest-of-raw-hex-bytes-a87d2f83","name":"BLAKE2b-512 Hex Digest of Raw Hex Bytes","description":"Call when an agent needs a blake2b512 digest of hex bytes, encoded as hex. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2b512-hex-rawhex first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2b512-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":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_MOfBz990qB6kMnFyalHt1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes a BLAKE2b-512 cryptographic digest of hex-encoded raw bytes input, returning the result as a hex string","exampleAgentPrompt":"Compute a BLAKE2b-512 digest of the raw hex bytes 'deadbeef0102030405' and give me the result as a hex string.","exampleUseCases":[{"title":"Binary data integrity fingerprinting","prompt":"I have some raw binary data represented as hex: '4d5a9000030000000400000000000000'. Can you compute its BLAKE2b-512 hash and return it in hex so I can store it as an integrity fingerprint?"},{"title":"Keyed BLAKE2b checksum for authentication","prompt":"Generate a keyed BLAKE2b-512 hex digest of the hex bytes 'cafebabe0011223344556677' using the key 'mysecretkey' — I need this for a message authentication check."},{"title":"Cross-platform hash verification","prompt":"I need to verify a file chunk: compute the BLAKE2b-512 hash of the raw hex bytes 'ff00aabb1234567890abcdef' and return it as hex so I can compare it against our stored checksum."}],"resultDescription":"A hex-encoded BLAKE2b-512 digest string (128 hex characters) representing the cryptographic hash of the provided hex-encoded raw bytes input, optionally keyed.","failureModes":["Invalid hex input (odd-length or non-hex characters) causes a 400 error","Key exceeds 512 characters causing validation failure","Empty key or text fields (minLength:1 required) cause rejection","Malformed JSON body results in parse error"],"whenToPreferThis":"Choose this endpoint when you need to hash raw binary data represented as hex bytes (not UTF-8 text) using BLAKE2b-512 with hex output. Use the free sandbox variant (/v1/sandbox/digest-blake2b512-hex-rawhex) first to avoid the $0.005 USDC cost. Prefer sibling endpoints if your input is plain text or if you need base64/base32 output encoding instead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:48:04.983Z","isFirstParty":false,"canonicalSlug":"blake2b-512-hex-digest-of-raw-hex-bytes-a87d2f83"}