{"uid":"cap_Z0bdC7DTZI9Mki1JFU0Np","slug":"sha-256-hex-digest-5c4f86bd","name":"SHA-256 Hex Digest","description":"Call when an agent needs a sha256 digest of text, encoded as hex. No network and no LLM. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-sha256-hex first.","url":"https://agentshelf.syntexa.ch/v1/digest-sha256-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":"0.009","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_3q3YYhtz7Aq6QwsaOgR23","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-256 hash of input text and returns the result encoded as a lowercase hexadecimal string, with no network calls or LLM involvement.","exampleAgentPrompt":"Can you SHA-256 hash the text 'Hello, world!' and give me the hex-encoded digest?","exampleUseCases":[{"title":"Verify file content integrity","prompt":"Hash this string with SHA-256 and give me the hex digest so I can verify it matches the expected checksum: 'user_id=42&action=purchase&timestamp=1716300000'"},{"title":"Generate deterministic content fingerprint","prompt":"I need a SHA-256 hex fingerprint of this JSON payload to use as a cache key: '{\"product\":\"widget\",\"qty\":3,\"price\":9.99}'"},{"title":"Produce message authentication token","prompt":"Compute the SHA-256 hex digest of the message 'reset-password:user@example.com:1716300000' so I can compare it against a stored hash."}],"resultDescription":"Returns a 64-character lowercase hexadecimal string representing the SHA-256 digest of the provided input text. The computation is deterministic and performed locally without any external network calls or LLM inference.","failureModes":["Missing or empty 'text' field returns a validation error","Text exceeding 100,000 characters is rejected","Missing or invalid 'key' field results in authentication failure","Payment failure (insufficient USDC) blocks the request","Malformed JSON request body returns a 400 error"],"whenToPreferThis":"Choose this endpoint when you need a fast, deterministic SHA-256 hex digest of a text string without setting up a local hashing library or trusting an LLM to compute it. It is preferable to SHA-256 in other encodings (base64, base32) when hexadecimal output is required, and preferred over blake2b or md5 sibling endpoints when specifically SHA-256 compatibility is needed. Try the free sandbox endpoint /v1/sandbox/digest-sha256-hex first before using this paid endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:46:20.165Z","isFirstParty":false,"canonicalSlug":"sha-256-hex-digest-5c4f86bd"}