ToolVet
78trust / 100

Chains Blocks

by TraceFast in Onchain & crypto

x402 APIPassing, checked 1 h ago

TraceFast live Ethereum data: one block by height — its header (hash, parent, roots, fee recipient, gas, base fee, blob gas) and the totals of what it contains: transactions by outcome, contract creations, blob transactions, logs, withdrawals, value moved, fees burnt and paid. Path number: Block height. Docs: https://docs.tracefast.xyz/api/block.md

GET https://mpp.tracefast.xyz/api/v1/chains/1/blocks/:number

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
292 ms typical, 523 ms slowest 5%
Last check
1 h ago
Next check
any minute now

How to call it

GET https://mpp.tracefast.xyz/api/v1/chains/1/blocks/:number

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/blocks/:number

Example response

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

Example response, 35 lines
{
  "data": {
    "baseFeePerGas": "1200426623",
    "blobBaseFeeWei": "17593154",
    "blobGasUsed": "1572864",
    "blobTxCount": 4,
    "burntFees": "40544067070237445",
    "chainId": 1,
    "contractCreationCount": 2,
    "difficulty": "0",
    "excessBlobGas": "194935605",
    "extraData": "0x546974616e2028746974616e6275696c6465722e78797a29",
    "failedTxCount": 7,
    "feeRecipient": "0x4838b106fce9647bdf1e7877bf73ce8b0bad5f97",
    "gasLimit": "60000000",
    "gasUsed": "33774715",
    "hash": "0xf398976165ca4756c77fc6b61111fa1102d431eb03082417ecce38b36308d728",
    "logCount": 687,
    "number": 25000000,
    "ommersCount": 0,
    "parentHash": "0xc5a79102dcb47469ef357021c974bbbb92df3a1f3cfbcb5fdc0f9b36fb75e2c7",
    "receiptsRoot": "0x54b42d562e10336b383c9606d2689a0b6cd8a08811143415237f24c28a3503df",
    "stateRoot": "0x055eba2b2b3daa967118fe831b0988cb27434e274f97f66cc67dcaa16dbe417f",
    "successfulTxCount": 370,
    "timestamp": 1777637363,
    "totalGasFees": "92572548652185775",
    "totalTips": "52028481581948330",
    "totalValueWei": "221308805817929372416",
    "totalWithdrawalGwei": "440701235",
    "transactionsRoot": "0x626849ea20575d04b0c443bdf72038bdb89f0e5ea5783ce16cbc357174b605f7",
    "txCount": 377,
    "uniqueAddressCount": 473,
    "withdrawalCount": 16
  }
}

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/blocks/:number'

# 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/blocks/:number' \
  | 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%2Fblocks%2F%3Anumber
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/blocks/:number");
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/blocks/:number")
    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
1 h agoPassed402161 ms$0.005
6 h agoPassed402213 ms$0.005
10 h agoPassed402434 ms$0.005
13 h agoPassed402362 ms$0.005
17 h agoPassed402257 ms$0.005
21 h agoPassed40244 ms$0.005
25 h agoPassed402364 ms$0.005
29 h agoPassed402458 ms$0.005
33 h agoPassed402331 ms$0.005
36 h agoPassed402340 ms$0.005
40 h agoPassed40239 ms$0.005
43 h agoPassed402281 ms$0.005
47 h agoPassed402169 ms$0.005
2 days agoPassed402605 ms$0.005
2 days agoPassed402523 ms$0.005

History

12 Oct 2026Price changed from $0.01 to $0.005