{"uid":"cap_7WKZIhWK3_oDDLyH3odIF","slug":"sha3-256-base64-digest-api-47b6fba4","name":"SHA3-256 Base64 Digest API","description":"Call when an agent needs a sha3-256 digest of text, encoded as base64. No network and no LLM. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-base64 first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha3-256-base64?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":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BJnTee2RStzn_lvy8r84e","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","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 a base64 string","exampleAgentPrompt":"Can you compute the SHA3-256 hash of the text 'Hello, world!' and give it back to me as base64?","exampleUseCases":[{"title":"Content integrity fingerprinting","prompt":"Take this document text and compute its SHA3-256 hash as base64 so I can store a tamper-evident fingerprint alongside it."},{"title":"Deterministic ID generation","prompt":"Hash this user input string 'order-ref-20240517-ABC' using SHA3-256 and return the base64 result so I can use it as a unique, deterministic identifier."},{"title":"Verifying checksums for security","prompt":"I have this payload text and a claimed SHA3-256 base64 checksum — can you compute the SHA3-256 base64 digest of the text so I can compare it against the claimed value to check for tampering?"}],"resultDescription":"Returns a base64-encoded SHA3-256 digest string representing the cryptographic hash of the submitted text input. The result is deterministic and identical for the same input every time.","failureModes":["Text input is empty or exceeds 100,000 character limit — returns validation error","Missing or invalid API key — returns authentication error","Malformed request body — returns schema validation error"],"whenToPreferThis":"Choose this endpoint when you need a SHA3-256 hash specifically encoded as base64 (not hex or base32). Prefer this over MD5 or BLAKE2 variants when SHA3-256 is required for security compliance or interoperability. Use the free sandbox endpoint (/v1/sandbox/digest-sha3-256-base64) first for testing before paying $0.004 USDC per call. Prefer this over doing hashing client-side if you need a trusted, stateless, no-network, no-LLM cryptographic computation as a service.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:42:01.837Z","isFirstParty":false,"canonicalSlug":"sha3-256-base64-digest-api-47b6fba4"}