{"uid":"cap_3NyurpK5NYpvjQpt2gg4b","slug":"blake2s-256-digest-as-base64url-d8798533","name":"BLAKE2s-256 Digest as Base64URL","description":"Call when an agent needs a blake2s256 digest of text, encoded as base64url. No network and no LLM. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-blake2s256-base64url?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":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_LaoIoV3NzvXZAUijhUrmk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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 cryptographic hash of input text and returns it encoded as base64url, with no network calls or LLM involved.","exampleAgentPrompt":"Can you compute a BLAKE2s-256 hash of the text 'Hello, world!' and give me the result encoded as base64url?","exampleUseCases":[{"title":"Integrity fingerprint for log entries","prompt":"I need a base64url-encoded BLAKE2s-256 hash of this log line to use as a tamper-evident fingerprint: 'ERROR 2024-06-01T12:00:00Z server crashed unexpectedly'"},{"title":"Keyed HMAC-style digest for API tokens","prompt":"Generate a keyed BLAKE2s-256 digest encoded as base64url for the text 'user:42:session:abc123' using the key 'mysecretkey', so I can use it as a short authentication token."},{"title":"Deduplication hash for text chunks","prompt":"Hash this text chunk using BLAKE2s-256 and return it as base64url so I can use it as a deduplication key: 'The quick brown fox jumps over the lazy dog'"}],"resultDescription":"Returns a BLAKE2s-256 cryptographic digest of the input text, encoded as a base64url string. If a key is provided, a keyed variant of the hash is produced. The result is deterministic and compact, suitable for checksums, deduplication, and integrity verification.","failureModes":["Text or key exceeds length limits (text > 100,000 chars or key > 512 chars) — returns 4xx validation error","Missing or empty text field — returns 4xx validation error","Payment not provided or insufficient — returns 402 Payment Required","Malformed request body — returns 4xx parse error"],"whenToPreferThis":"Choose this endpoint when you need a fast, deterministic BLAKE2s-256 hash of text encoded specifically as base64url (not hex or standard base64). Prefer this over the sibling blake2s256-base64 endpoint when the output must be URL-safe. Use the free sandbox endpoint (/v1/sandbox/digest-blake2s256-base64url) first to test; pay only when you need production reliability. Ideal for agents requiring compact, URL-safe cryptographic fingerprints without any network or AI overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:57.231Z","isFirstParty":false,"canonicalSlug":"blake2s-256-digest-as-base64url-d8798533"}