ToolVet
78trust / 100

Transactions Events

by TraceFast in Onchain & crypto

x402 APIPassing, checked 3 h ago

TraceFast live Ethereum data: the event logs a transaction emitted, in emission order, each with the emitting contract, topics and data, and — when the event signature is known — the decoded event name and arguments with a stated confidence. Path hash: Transaction hash, `0x`-prefixed, 64 hex characters, any case. Query limit: 1..=100, default 25; cursor: `nextCursor` of the previous page. Docs: https://docs.tracefast.xyz/api/transaction-events.md

GET
https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash/events
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
128 ms
406 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/events

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/events?limit=10

Example response

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

{
  "data": {
    "events": [],
    "hash": "0x0e646d1b52758cafe4eca236972927be572053491217fa08751d3958a1e30f0a"
  }
}

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/events?limit=10'

# 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/events?limit=10' \
  | 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%2Fevents
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash/events?limit=10");
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/events?limit=10")
    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 agoPassed402308 ms$0.005
7 h agoPassed402337 ms$0.005
11 h agoPassed402363 ms$0.005
15 h agoPassed40261 ms$0.005
20 h agoPassed402341 ms$0.005
Show 10 older checks
24 h agoPassed402315 ms$0.005
28 h agoPassed402253 ms$0.005
32 h agoPassed402123 ms$0.005
36 h agoPassed402372 ms$0.005
40 h agoPassed40268 ms$0.005
44 h agoPassed402101 ms$0.005
2 days agoPassed402128 ms$0.005
2 days agoPassed4021.2 s$0.005
2 days agoPassed402166 ms$0.005
3 days agoPassed402406 ms$0.005

History

12 Oct 2026Price changed from $0.01 to $0.005