{"uid":"cap_HjIocI8AWbU5d6yW1dqDv","slug":"sha-512-hex-digest-api-f14f2446","name":"SHA-512 Hex Digest API","description":"Call when an agent needs a sha512 digest of text, encoded as hex. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-hex first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha512-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":"0.007","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_FYfHjRzSJK9qU_fCT_eo_","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 cryptographic hash of input text and returns the result encoded as a hexadecimal string.","exampleAgentPrompt":"Can you compute the SHA-512 hex digest of this string: 'Hello, world! This is my document content.'?","exampleUseCases":[{"title":"File integrity checksum generation","prompt":"I need to verify a document hasn't been tampered with — compute the SHA-512 hex hash of this text so I can store it as a checksum: 'Invoice #4892: Total $4,250.00, due 2024-06-01, client Acme Corp.'"},{"title":"Deterministic ID for deduplication","prompt":"Generate a SHA-512 hex digest of this article body so I can use it as a unique fingerprint to detect duplicate content: 'The quick brown fox jumps over the lazy dog. Repeated submissions waste reviewer time.'"},{"title":"Password pre-hashing before storage","prompt":"Hash this passphrase with SHA-512 and give me the hex output before I send it to the server: 'correct-horse-battery-staple-2024'"}],"resultDescription":"Returns a 128-character lowercase hexadecimal string representing the SHA-512 digest of the submitted text. The computation is fully deterministic, offline (no external network calls), and requires no language model — identical input always produces identical output.","failureModes":["Empty or missing text field returns a validation error","Text exceeding 100,000 characters is rejected","Missing or invalid API key (key field) returns an authentication error","Payment failure (insufficient USDC) results in HTTP 402","Malformed JSON body returns a 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need a standard SHA-512 hash with hex encoding specifically — not base64, base32, or base64url. Prefer the free sandbox endpoint POST /v1/sandbox/digest-sha512-hex for testing or cost-sensitive workflows. Use this paid endpoint when the sandbox is unavailable or when you need production-grade reliability. For shorter hashes, sibling endpoints offer MD5, SHA-224, or SHA3 variants; for different encodings of SHA-512, check sibling endpoints on the same host.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:50:46.866Z","isFirstParty":false,"canonicalSlug":"sha-512-hex-digest-api-f14f2446"}