ToolVet
78trust / 100

Chains Transactions

by TraceFast in Onchain & crypto

x402 APIPassing, checked 3 h ago

TraceFast live Ethereum data: one transaction by hash — sender, recipient, value, nonce, type, gas limit and gas used, the fee fields of its type and the price actually paid per gas, the receipt's outcome and log count, and its position (block and index). Path hash: Transaction hash, `0x`-prefixed, 64 hex characters, any case. Docs: https://docs.tracefast.xyz/api/transaction.md

GET
https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
266 ms
596 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

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://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash

Each call costs $0.005 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://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash

Example response

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

{
  "data": {
    "blockNumber": 25000000,
    "chainId": 1,
    "effectiveGasPrice": "1686629123",
    "from": "0x9f59a6cc9538d4764cabde4ccaf6d02c8e8dddd6",
    "gasLimit": "35000",
    "gasUsed": "32698",
    "hash": "0x0e646d1b52758cafe4eca236972927be572053491217fa08751d3958a1e30f0a",
    "inputSize": 36,
    "logCount": 0,
    "maxFeePerGas": "2674891592",
    "maxPriorityFeePerGas": "486202500",
    "methodId": "0x69f497f5",
    "nonce": 31238,
    "status": 1,
    "timestamp": 1777637363,
    "to": "0x681e908b8ab57c49c74d770f369754ccc3e1ae09",
    "txIndex": 0,
    "txType": 2,
    "valueWei": "0"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash'

# 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://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmpp.tracefast.xyz%2Fapi%2Fv1%2Fchains%2F1%2Ftransactions%2F%3Ahash
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash")
    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
3 h agoPassed402119 ms$0.005
7 h agoPassed402452 ms$0.005
11 h agoPassed402180 ms$0.005
15 h agoPassed402500 ms$0.005
20 h agoPassed402324 ms$0.005
Show 10 older checks
24 h agoPassed40259 ms$0.005
28 h agoPassed402214 ms$0.005
32 h agoPassed402182 ms$0.005
36 h agoPassed402471 ms$0.005
40 h agoPassed402552 ms$0.005
44 h agoPassed402596 ms$0.005
2 days agoPassed402266 ms$0.005
2 days agoPassed40252 ms$0.005
2 days agoPassed402616 ms$0.005
3 days agoPassed402552 ms$0.005

History

12 Oct 2026Price changed from $0.01 to $0.005