ToolVet
72trust / 100

Hash

by Hash in Onchain & crypto

x402 APIPassing, checked 6 h ago

Compute keccak256 (the EVM/Solidity hash — event topics, function selectors, mapping keys) or sha256 of any input. Pass input=text for UTF-8, or 0x-hex to hash raw bytes; algo=keccak256 (default) or sha256. Returns the digest and, for keccak, the 4-byte function selector. Pure compute, no chain, sub-cent — the commodity hashing call the whole x402 ecosystem hammers, served at the floor. Not financial advice.

GET
https://402.com.tr/api/x402/hash
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
546 ms
686 ms slowest 5%
Last check
Passed
6 h ago, next in 27 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://402.com.tr/api/x402/hash

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://402.com.tr/api/x402/hash?algo=keccak256&input=Transfer%28address%2Caddress%2Cuint256%29

Parameters

ParameterTypeRequiredDescription
algostringNokeccak256 (default) or sha256
inputstringYesText or 0x-hex to hash

Example response

The provider's example. We can't check it without paying.

{
  "algo": "keccak256",
  "checkedAt": "2026-10-11T17:27:41.737Z",
  "hash": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
  "inputBytes": 33,
  "selector": "0xddf252ad"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://402.com.tr/api/x402/hash?algo=keccak256&input=Transfer%28address%2Caddress%2Cuint256%29'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://402.com.tr/api/x402/hash?algo=keccak256&input=Transfer%28address%2Caddress%2Cuint256%29' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fhash
const res = await pay("https://402.com.tr/api/x402/hash?algo=keccak256&input=Transfer%28address%2Caddress%2Cuint256%29");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://402.com.tr/api/x402/hash?algo=keccak256&input=Transfer%28address%2Caddress%2Cuint256%29")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
6 h agoPassed402646 ms$0.002
16 h agoPassed402458 ms$0.002
25 h agoPassed402558 ms$0.002
35 h agoPassed402439 ms$0.002
40 h agoPassed402397 ms$0.002
Show 10 older checks
44 h agoPassed402519 ms$0.002
2 days agoPassed402546 ms$0.002
2 days agoPassed402570 ms$0.002
2 days agoPassed402581 ms$0.002
3 days agoPassed402512 ms$0.002
3 days agoPassed402620 ms$0.002
3 days agoPassed402579 ms$0.002
3 days agoPassed402494 ms$0.002
3 days agoPassed402477 ms$0.002
3 days agoPassed4021.8 s$0.002