{"uid":"cap_H-9Uu5Mxr6samF6_6PicX","slug":"agentshelf-shake-128-digest-base64url-64160d2e","name":"AgentShelf SHAKE-128 Digest (Base64URL)","description":"Call when an agent needs a shake128 digest of text, encoded as base64url. No network and no LLM. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-shake128-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-shake128-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":"0.003","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_EzlJ0AZhqvO6uSAhApJTQ","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 SHAKE-128 (XOF) hash of input text and returns the digest encoded as a base64url string.","exampleAgentPrompt":"Compute the SHAKE-128 hash of the text 'Hello, world!' and give me the result as a base64url-encoded string.","exampleUseCases":[{"title":"Content fingerprinting for deduplication","prompt":"I need a SHAKE-128 base64url digest of this article text so I can fingerprint it for deduplication: 'The quick brown fox jumps over the lazy dog. Repeated content should produce the same hash.'"},{"title":"Cryptographic checksum for file validation","prompt":"Can you hash this config file content using SHAKE-128 and return it as base64url so I can compare it against the expected checksum? The text is: 'debug=false\\nport=8080\\nhost=localhost'"},{"title":"Unique token generation from seed text","prompt":"Generate a SHAKE-128 base64url digest of the string 'user-session-seed-2024-abc123' so I can use it as a compact, URL-safe token identifier."}],"resultDescription":"Returns a base64url-encoded string representing the SHAKE-128 digest of the provided input text. The output is a compact, URL-safe hash suitable for use in tokens, checksums, or identifiers.","failureModes":["Empty or missing 'text' field returns a validation error","Text exceeding 100,000 characters is rejected","Missing or invalid key parameter may cause authentication failure","Payment not fulfilled results in 402 Payment Required response","Malformed request body returns 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need a SHAKE-128 (extendable output function / XOF) hash of text and specifically require the output in base64url encoding — ideal for URL-safe tokens, compact identifiers, or systems that consume base64url-formatted digests. Prefer the free sandbox endpoint (/v1/sandbox/digest-shake128-base64url) first for testing. Use alternative sibling endpoints if you need a different hash algorithm (SHA-512, SHA3-384, etc.) or a different encoding (hex, base32, base64).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:38.632Z","isFirstParty":false,"canonicalSlug":"agentshelf-shake-128-digest-base64url-64160d2e"}