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Crypto Hash & Blockchain Identifier Computation API
x402
Crypto Hash & Blockchain Identifier Computation API is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Computes keccak256, sha256, Ethereum function selectors, event topic0, 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 identifier as a hex string — e.g. the 32-byte keccak256 digest, 4-byte function selector, 32-byte event topic0, or 32-byte ENS namehash/labelhash — depending on the chosen algorithm.
Example use cases
Example prompt
“What's the keccak256 hash of the UTF-8 string 'hello world', and also give me the 4-byte function selector for the Solidity signature 'transfer(address,uint256)'?”
Technical details
Endpoint
GEThttps://api.agentstools.dev/crypto/hashWhen to prefer
Use this endpoint when you need deterministic blockchain-specific hashes — especially Ethereum keccak256, Solidity function selectors, event topic0 hashes, or ENS name resolution identifiers — without running a local Ethereum library. Prefer it over generic hash APIs when ENS namehash/labelhash or EVM ABI-encoding-aware selector computation is required.
Side effects
- Missing required 'algo' or 'input' query params returns a 400 error
- Invalid algorithm name not in the supported enum returns an error
- Providing a malformed hex string when encoding=hex may return a parse error
- Payment not included or insufficient results in a 402 Payment Required response
- Unsupported encoding value returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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