{"uid":"cap_tAGg9deAJ8-Kf8nBxNB7K","slug":"sha-512-256-digest-base64url-agentshelf-syntexa-ch-6130037b","name":"SHA-512/256 Digest (Base64url) — agentshelf.syntexa.ch","description":"Call when an agent needs a sha512-256 digest of text, encoded as base64url. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-256-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha512-256-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":"0.007","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_lNiTzE4uKR2Zms2CmV-eg","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 SHA-512/256 cryptographic hash of the provided text and returns it encoded as a base64url string.","exampleAgentPrompt":"Can you compute the SHA-512/256 hash of the text 'Hello, world! This is my document content.' and give it back as a base64url-encoded digest?","exampleUseCases":[{"title":"Content fingerprinting for deduplication","prompt":"I need a base64url-encoded SHA-512/256 fingerprint of this article text so I can detect duplicates: 'The quick brown fox jumps over the lazy dog. This is the full article body here.'"},{"title":"Integrity token for API payload","prompt":"Hash this JSON payload string for me using SHA-512/256 and encode it as base64url so I can attach it as an integrity token: '{\"user\":\"alice\",\"action\":\"transfer\",\"amount\":100}'"},{"title":"Deterministic ID generation from user input","prompt":"Generate a SHA-512/256 base64url digest of the string 'user:alice@example.com:2024-06-01' so I can use it as a stable, collision-resistant identifier."}],"resultDescription":"Returns a base64url-encoded string representing the SHA-512/256 cryptographic hash of the input text. The digest is computed locally with no network calls or LLM involvement, guaranteeing deterministic and reproducible output for identical inputs.","failureModes":["Text or key field missing or empty (minLength:1 violated) — returns 400 Bad Request","Text exceeds 100,000 character limit — returns 400 or 413","Payment of exactly $0.007 USDC not provided — returns 402 Payment Required","Invalid input types (e.g. non-string values) — returns 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you specifically need a SHA-512/256 hash (a truncated variant of SHA-512 with a different initialization vector) encoded in URL-safe base64url format. Prefer this over the hex or base32 variants when the digest will be embedded in URLs, JWT tokens, or other contexts where padding-free URL-safe encoding is required. Use the free sandbox endpoint (/v1/sandbox/digest-sha512-256-base64url) for testing before paying.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:47:41.345Z","isFirstParty":false,"canonicalSlug":"sha-512-256-digest-base64url-agentshelf-syntexa-ch-6130037b"}