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SHA3-256 Hex Digest API
x402
SHA3-256 Hex Digest API is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Computes a SHA3-256 cryptographic hash of input text and returns it as a hexadecimal string
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs a sha3-256 digest of text, encoded as hex. No network and no LLM. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-hex first.
Output
A JSON response containing the SHA3-256 hexadecimal digest of the submitted text. The output is a lowercase hex string of fixed length (64 hex characters representing 256 bits). No network calls or LLM are involved; the result is purely deterministic computation.
Example use cases
Data integrity checksum for logs
“I need to fingerprint this log entry for tamper detection — can you hash 'ERROR 2024-06-01T12:00:00Z: disk quota exceeded on node-7' using SHA3-256 and return the hex digest?”
Deterministic ID generation from content
“Generate a SHA3-256 hex digest of this JSON blob so I can use it as a content-addressable key: '{"user":"alice","action":"login","ts":1717200000}'”
Password pre-hash before storage
“Hash the string 'MyS3cur3P@ssw0rd!' with SHA3-256 and give me the hex result before I send it to the storage layer.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-sha3-256-hex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a SHA3-256 hash specifically encoded as lowercase hexadecimal, with no external network dependency and purely deterministic output. Prefer the free sandbox endpoint POST /v1/sandbox/digest-sha3-256-hex for testing. Use this paid endpoint in production when you need SHA3-256 hex digests at scale and the $0.003 USDC per-call cost is acceptable. If you need a different hash algorithm (SHA-384, SHA-512) or a different encoding (base64, base64url, base32), sibling endpoints on the same host provide those variants.
Side effects
- Empty or missing 'text' field returns a validation error
- Text exceeding 100,000 characters is rejected
- Missing or invalid API key returns an authentication error
- Malformed JSON request body returns a 400 error
- Payment of $0.003 USDC not included or failed results in 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored. |
| text | string | 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. |
Tags
x402
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