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Hash Digest
x402
Hash Digest is a paid API for AI agents from x402-echo-service.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Compute cryptographic hash digests (SHA-256, SHA-512, or Keccak-256) of an input string and return hex-encoded results.
Price / call$0.001
Success—
StatusUnknown
How this service works
Compute cryptographic digests of a string. POST {"input":"...","algorithms":["sha256"]} and receive one hex digest per requested algorithm. Supports sha256, sha512 and keccak256. Deterministic, no storage, no upstream calls.
Output
Returns an object mapping each requested algorithm name to its hex-encoded digest of the input string. For example: {"sha256": "b94d27b9...", "keccak256": "4e03657a..."}. Results are deterministic and purely computed — no state is stored and no external calls are made.
Example use cases
Verify Ethereum message hash
“Compute the keccak256 hash of the string 'Transfer 1 ETH to 0xABCD' so I can verify it matches what the contract is expecting.”
Fingerprint data for deduplication
“Hash this JSON payload with sha256 so I can use it as a unique fingerprint to detect duplicates: '{"user":42,"action":"login"}'.”
Cross-algorithm digest comparison
“Run 'my secret passphrase' through sha256, sha512, and keccak256 all at once and show me all three hex digests side by side.”
Technical details
Endpoint
POSThttps://x402-echo-service.onrender.com/hashWhen to prefer
Choose this endpoint when you need a quick, deterministic cryptographic hash of a string without setting up local crypto libraries — especially useful in agent pipelines where you need keccak256 (Ethereum-compatible hashing) alongside standard SHA algorithms. Ideal for verifying data integrity, generating content fingerprints, or producing Ethereum-compatible hashes in a serverless context. Prefer this over local computation when operating in environments where native crypto is unavailable or for multi-algorithm comparisons in a single call.
Side effects
- Empty or missing input string returns a validation error
- Unsupported algorithm name (anything other than sha256, sha512, keccak256) returns an error
- Input exceeding 65536 characters is rejected
- Malformed JSON body returns a 400 error
- Service unavailability on Render cold-start may cause occasional timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | |
| algorithms | array |
Tags
x402
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