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Crypto Hash & Selector Calculator (keccak256, sha256, ENS, ABI selector)
x402
Crypto Hash & Selector Calculator (keccak256, sha256, ENS, ABI selector) is a paid API for AI agents from webtools402.176-109-107-191.sslip.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Computes keccak256, sha256, 4-byte ABI function selectors, event topic0 hashes, ENS namehash, or ENS labelhash from a string or hex input.
Price / call$0.001
Success—
StatusUnknown
How this service works
Compute keccak256/sha256, a 4-byte function selector, an event topic0, or an ENS namehash/labelhash from a string or hex input.
Output
Returns the computed hash or selector as a hex string. For keccak256/sha256: a 32-byte hex digest. For selector: a 4-byte hex value. For event_topic: a 32-byte topic0. For namehash/labelhash: a 32-byte ENS-standard hash. Response is a JSON object with the result field.
Example use cases
Example prompt
“What's the keccak256 hash of the UTF-8 string 'Hello, World!' and also give me the 4-byte ABI function selector for transfer(address,uint256)?”
Technical details
Endpoint
GEThttps://webtools402.176-109-107-191.sslip.io/crypto/hashWhen to prefer
Use this endpoint when an AI agent needs to compute blockchain-relevant hashes on demand — especially Ethereum ABI function selectors, event topic0 values, ENS namehash/labelhash, or general-purpose keccak256/sha256 digests — without running local crypto libraries. Ideal for Solidity development tooling, ENS resolution workflows, or verifying ABI encoding.
Side effects
- Missing required 'algo' or 'input' query params returns 400
- Invalid algorithm name not in enum returns 400
- Hex input that is not valid hex returns 400 or parse error
- Malformed ENS name for namehash/labelhash may return an error
- Payment not provided or insufficient returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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