{"uid":"cap_cpIA3DcrHah3PYDWoQUHb","slug":"sha3-256-digest-as-base64url-f73cfc7c","name":"SHA3-256 Digest as Base64URL","description":"Call when an agent needs a sha3-256 digest of text, encoded as base64url. No network and no LLM. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha3-256-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":"0.005","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_HLM0DONyt1cjwFa-ddYnz","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 SHA3-256 cryptographic hash of input text and returns it encoded as base64url","exampleAgentPrompt":"Can you compute the SHA3-256 hash of the text 'Hello, World!' and give me the result encoded as base64url?","exampleUseCases":[{"title":"Integrity fingerprint for stored document","prompt":"I need to generate a SHA3-256 fingerprint of this contract text encoded as base64url so I can store it alongside the file and verify it hasn't been tampered with later: 'This agreement is entered into on January 1, 2025...'"},{"title":"Unique token derived from user input","prompt":"Take the string 'user-session-abc123-2025' and compute its SHA3-256 hash in base64url encoding so I can use it as a unique, safe identifier in a URL."},{"title":"Verify data consistency across systems","prompt":"I have two systems that both claim to have the same payload. Can you SHA3-256-hash this text in base64url format so I can compare it against what the other system reports: 'product_id=9821&price=49.99&qty=3'?"}],"resultDescription":"Returns a SHA3-256 cryptographic digest of the submitted text, encoded as a base64url string. The output is deterministic and suitable for use as a fingerprint, checksum, or compact identifier in URLs and headers.","failureModes":["Text exceeds 100,000 character limit — request rejected","Empty text or key field — validation error","Malformed JSON body — 400 bad request","Payment not included or insufficient — 402 payment required","Network timeout during payment processing"],"whenToPreferThis":"Choose this endpoint when you specifically need SHA3-256 (Keccak family, not SHA-2) output in base64url encoding — particularly when the digest must be safe for URL or filename use without additional encoding. Prefer the free sandbox variant (/v1/sandbox/digest-sha3-256-base64url) for testing. Use this paid version in production or when sandbox access is unavailable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:46:29.191Z","isFirstParty":false,"canonicalSlug":"sha3-256-digest-as-base64url-f73cfc7c"}