{"uid":"cap_VdH2hbP3jnMHgxpBXfzM6","slug":"agentshelf-shake256-hex-digest-e9a2cfda","name":"AgentShelf SHAKE256 Hex Digest","description":"Call when an agent needs a shake256 digest of text, encoded as hex. No network and no LLM. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-shake256-hex first.","url":"https://agentshelf.syntexa.ch/v1/digest-shake256-hex?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":"0.005","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_xaWAvba22s7HoZRw920wS","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 SHAKE256 hash of the provided text and returns the result encoded as a hexadecimal string","exampleAgentPrompt":"Compute the SHAKE256 hex digest of this text: 'The quick brown fox jumps over the lazy dog'","exampleUseCases":[{"title":"Data integrity fingerprinting pipeline","prompt":"Hash this JSON payload with SHAKE256 and give me the hex digest so I can store it as a content fingerprint: '{\"user\":\"alice\",\"action\":\"login\",\"ts\":1718000000}'"},{"title":"Deterministic ID generation from text","prompt":"I need a SHAKE256 hex hash of the string 'order-ref-2024-XZ99' to use as a deterministic identifier in my database."},{"title":"Verifying document content hasn't changed","prompt":"Take this contract text and compute its SHAKE256 hex digest so I can compare it against the hash I saved last week to see if anything changed: 'This agreement is entered into on January 1, 2025 between Party A and Party B...'"}],"resultDescription":"Returns a hexadecimal-encoded SHAKE256 digest of the submitted text. The output is a deterministic, fixed-length hex string derived purely from the input text using the SHAKE256 extendable-output function (XOF). No network calls or LLM inference are involved in the computation.","failureModes":["Empty or missing 'text' field returns a validation error","Text exceeding 100,000 characters is rejected","Missing or empty 'key' field returns a validation error","Key exceeding 512 characters is rejected","Insufficient USDC balance results in payment failure (x402)","Malformed JSON request body returns a 400 error"],"whenToPreferThis":"Choose this endpoint when you need a SHAKE256 digest specifically encoded as hexadecimal (rather than base64 or other encodings), and want a fast, deterministic, no-dependency computation without involving an LLM or external network call. Prefer the free sandbox equivalent (/v1/sandbox/digest-shake256-hex) for testing. Use this paid version for production workflows requiring reliable uptime and guaranteed response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:06.723Z","isFirstParty":false,"canonicalSlug":"agentshelf-shake256-hex-digest-e9a2cfda"}