Use when an agent is building something Ethereum will hash and must get the same...
https://flat-rate-llm.kikoribera03.workers.dev/v1/util/keccak256Overview
Use when an agent is building something Ethereum will hash and must get the same digest the chain gets: Keccak-256 of any string or hex payload, with the byte count. It is NOT SHA3-256, and that confusion is the usual reason a selector or a CREATE2 address comes out wrong. Do not use for file digests or API signatures outside Ethereum (/v1/util/sha256) or for a function selector, which is already built for you (/v1/util/selector).
Protocol
x402
Price
$0.0050
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Keccak-256 hash
Source
bazaar
Indexed
2026-09-08 21:13:49
Health
Status
healthy
Latency (p50)
370ms
Uptime (30d)
98.5%
Reliability Score
94.2/100
Last Checked
2026-10-31 07:14:49
Last Healthy
2026-10-31 07:14:49
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"input": "hello"
},
"type": "http"
}
Output Schema
{
"example": {
"bytes": 5,
"hash": "0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
},
"type": "json"
}