{"uid":"cap_k4WbJyMVV51pgAbpk6wwV","slug":"sha-512-base64url-digest-0636d3a7","name":"SHA-512 Base64URL Digest","description":"Call when an agent needs a sha512 digest of text, encoded as base64url. No network and no LLM. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-base64url first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha512-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":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_K9wIqHikfDXiIj469A7PK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","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 cryptographic hash of input text and returns the result encoded as a base64url string.","exampleAgentPrompt":"Can you hash the text 'Hello, world!' using SHA-512 and give me the result as a base64url-encoded digest?","exampleUseCases":[{"title":"Content integrity fingerprinting","prompt":"I need a SHA-512 hash of this JSON blob encoded as base64url so I can store a tamper-evident fingerprint of the record: '{\"user\":\"alice\",\"action\":\"purchase\",\"amount\":42}'"},{"title":"Password pre-hashing before storage","prompt":"Before I send this password to our server, hash it with SHA-512 and encode it as base64url — the password is 'correct horse battery staple'."},{"title":"Deterministic token generation from seed","prompt":"Take the string 'session:user123:2024-06-01' and give me its SHA-512 digest encoded as base64url so I can use it as a deterministic session token."}],"resultDescription":"Returns a SHA-512 cryptographic hash of the input text, encoded as a base64url string (no padding characters, URL-safe alphabet). The digest is 86 characters long and deterministic for any given input.","failureModes":["Empty or missing text field returns a validation error","Text exceeding 100,000 characters is rejected","Missing required fields return a 400 Bad Request","Payment not provided or insufficient USDC results in a 402 Payment Required response"],"whenToPreferThis":"Use this endpoint when you need a SHA-512 digest specifically in base64url encoding (URL-safe, no padding) rather than hex or standard base64. Prefer it over computing hashes locally when operating in a sandboxed agent environment without access to cryptographic libraries. If cost is a concern, try the free sandbox endpoint POST /v1/sandbox/digest-sha512-base64url first. Choose SHA-512 over shorter variants (SHA-224, SHA-256) when maximum collision resistance is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-03T00:43:32.820Z","isFirstParty":false,"canonicalSlug":"sha-512-base64url-digest-0636d3a7"}