{"uid":"cap_4dP-2L4Etd59MRnweQWJR","slug":"shake256-digest-base64url-encoder-f6435695","name":"SHAKE256 Digest Base64URL Encoder","description":"Call when an agent needs a shake256 digest of text, encoded as base64url. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-shake256-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-shake256-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":"0.007","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":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8mC4kVPax-CSJFJ1Vk8S3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes a SHAKE256 hash of input text with an optional key and returns the digest encoded as base64url","exampleAgentPrompt":"Hash the text 'Hello, world!' using SHAKE256 and give me the result as a base64url-encoded digest, using key 'mySecretKey'.","exampleUseCases":[{"title":"Content integrity fingerprinting","prompt":"Take this article text and compute a SHAKE256 base64url digest for it so I can use it as a unique fingerprint to detect changes later. The text is: 'The quick brown fox jumps over the lazy dog.' Use key 'doc-v1'."},{"title":"Keyed token generation for API payloads","prompt":"I need a SHAKE256 base64url hash of the string 'user_id=42&action=purchase&timestamp=1720000000' using the key 'api-signing-key'. Can you compute that for me?"},{"title":"Deterministic ID from user input","prompt":"Generate a SHAKE256 base64url digest of the sentence 'Welcome to our platform, Jane Doe!' with the key 'onboarding' so I can use it as a deterministic unique identifier."}],"resultDescription":"Returns a SHAKE256 digest of the provided text, encoded as a base64url string. The response is deterministic — identical input text and key will always produce the same digest. No network calls or LLM inference are involved in the computation.","failureModes":["Missing or empty 'text' field returns a validation error","Text exceeding 100,000 characters is rejected","Key exceeding 512 characters is rejected","Payment of exactly $0.007 USDC must be provided; incorrect payment amount causes a 402 error","Malformed request body returns a 400 error"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically sound SHAKE256 hash with base64url output and no side effects — especially when you want a local-equivalent, deterministic digest without setting up cryptographic libraries. Prefer the free sandbox endpoint (/v1/sandbox/digest-shake256-base64url) for testing; use this paid endpoint in production pipelines where cost is acceptable for guaranteed uptime and service terms.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:50:40.219Z","isFirstParty":false,"canonicalSlug":"shake256-digest-base64url-encoder-f6435695"}