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SHAKE-128 Hex Digest
x402
SHAKE-128 Hex Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes a SHAKE128 (extendable-output function) digest of input text and returns the result encoded as a hexadecimal string.
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs a shake128 digest of text, encoded as hex. No network and no LLM. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/digest-shake128-hex first.
Output
Returns a hexadecimal string representing the SHAKE128 (XOF) digest of the provided input text. The output length is determined by the key parameter. No network calls or LLM inference are involved — the computation is purely deterministic and local.
Example use cases
Data integrity fingerprinting
“I need to generate a SHAKE128 hex digest of this JSON payload text so I can verify it hasn't been tampered with — the text is '{"user":"alice","action":"transfer"}' and the key is 'integrity-check'.”
Deduplication key generation
“Hash this document content using SHAKE128 and give me the hex output so I can use it as a deduplication key — the text is 'Invoice #4521 for $200 dated 2024-06-01' and the key is 'dedup'.”
Audit log content addressing
“Compute a SHAKE128 hex digest for this audit log entry 'user=bob event=login ts=1717200000' with key 'auditlog' so I can store it as a content-addressed identifier.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-shake128-hex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a SHAKE128 (extendable-output function) digest specifically encoded as hexadecimal. Use the free sandbox endpoint POST /v1/sandbox/digest-shake128-hex first for testing. Prefer this over SHA-2 or SHA-3 endpoints when an XOF (variable-length output) is required. Choose hex encoding over base64/base32 siblings when downstream systems expect hex format.
Side effects
- Empty or missing text/key fields return a validation error
- Text exceeding 100,000 characters is rejected
- Key exceeding 512 characters is rejected
- Payment not provided or insufficient USDC results in HTTP 402 Payment Required
- Malformed JSON body returns 400 Bad Request
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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