{"uid":"cap_nUM6asaS3mkZXcAh-glC9","slug":"blake2b-512-hex-digest-of-utf-16le-text-cacd5e46","name":"BLAKE2b-512 Hex Digest of UTF-16LE Text","description":"Call when an agent needs a blake2b512 digest of utf16le bytes, encoded as hex. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2b512-hex-utf16 first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2b512-hex-utf16?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":"0.003","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__IWOXPVzvKjWl2nk8DUoZ","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 keyed or unkeyed BLAKE2b-512 cryptographic hash of text encoded as UTF-16LE bytes, returning the digest as a lowercase hex string.","exampleAgentPrompt":"Compute a BLAKE2b-512 hash of the text 'Hello, World!' using UTF-16LE encoding and give me the result as a hex string, using the key 'mysecretkey'.","exampleUseCases":[{"title":"Keyed integrity tag for Windows file content","prompt":"Hash the text 'Invoice #4821 total: $9,500.00' as a UTF-16LE BLAKE2b-512 digest in hex using the key 'finance-audit-2024' so I can store it as a tamper-evident checksum."},{"title":"Deduplication fingerprint for Unicode documents","prompt":"I need a blake2b-512 hex fingerprint of the following Unicode document text using UTF-16LE encoding so I can detect duplicates in my archive: 'Rapport annuel 2023 — Résultats financiers'."},{"title":"Message authentication code for API payload","prompt":"Generate a keyed blake2b-512 hex digest of the payload string 'user_id=88234&action=transfer&amount=500' encoded as UTF-16LE using the key 'webhook-secret-xyz' so I can attach it as a MAC to my outgoing request."}],"resultDescription":"A hex-encoded BLAKE2b-512 digest string (128 hex characters) computed over the UTF-16LE byte representation of the input text, optionally keyed. The response is a deterministic, fixed-length hash suitable for integrity checks, deduplication, or keyed message authentication.","failureModes":["Text or key exceeds maximum length (100,000 chars for text, 512 chars for key) — validation error returned","Missing required 'text' field — request rejected","Invalid UTF-16LE encoding edge cases for certain emoji or surrogate pairs may produce unexpected results","Payment failure or insufficient USDC balance — 402 Payment Required response","Network timeout if service is temporarily unavailable"],"whenToPreferThis":"Choose this endpoint when you specifically need a BLAKE2b-512 digest computed over UTF-16LE bytes (the native encoding used by Windows, .NET, and many Microsoft file formats) and want the output as a hex string. Use it over SHA-3 siblings when BLAKE2b's speed or keying capability is required, and over the sandbox variant (/v1/sandbox/digest-blake2b512-hex-utf16) when you need a production, paid call. Prefer this over generic hashing libraries when operating in an agent environment that cannot run native code.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:19.860Z","isFirstParty":false,"canonicalSlug":"blake2b-512-hex-digest-of-utf-16le-text-cacd5e46"}