ToolVet
77trust / 100

Base Tx

by 1gateway in Onchain & crypto

x402 APIPassing, checked 3 h ago

Use when an agent must confirm a Base transaction or payment landed: did it succeed, who paid whom, how much of which token. Input: hash. Output: JSON status (success/reverted), block+time, confirmations, from, to, ETH value, fee (L2 gas + L1 data fee), decoded ERC-20 transfers with symbol and decimal amount (first 25). Unknown or unmined hash: 404, not charged. Example: ?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b

GET https://1gateway.dev/v1/onchain/base/tx

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
730 ms typical, 881 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

GET https://1gateway.dev/v1/onchain/base/tx

Each call costs $0.0045 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://1gateway.dev/v1/onchain/base/tx?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b

Parameters

ParameterTypeRequiredDescription
hashstringYesTransaction hash on Base mainnet (0x + 64 hex). Unknown or not yet mined → 404 (not charged)

Example response

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

Example response, 49 lines
{
  "block": {
    "number": 52399390,
    "timestamp": "2026-10-09T23:22:07.000Z"
  },
  "chain": "base",
  "chainId": 8453,
  "confirmations": 116004,
  "contractCreated": null,
  "erc20TransferCount": 1,
  "erc20Transfers": [
    {
      "amount": 0.01,
      "decimals": 6,
      "from": "0xec2aBD3EDA89BeD90124736e317e847D5fb6d034",
      "logIndex": 43,
      "raw": "10000",
      "symbol": "USDC",
      "to": "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1",
      "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    }
  ],
  "erc20TransfersTruncated": false,
  "fee": {
    "effectiveGasPriceGwei": 0.008030575,
    "gasUsed": 86250,
    "l1FeeEth": 1.987935652e-9,
    "totalEth": 6.94625029402e-7
  },
  "from": "0x93F6601151cCB08F333AB4B1CCcfb1e188c0bE44",
  "hash": "0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b",
  "input": {
    "bytes": 325,
    "selector": "0xe3ee160e"
  },
  "logCount": 2,
  "nonce": 1598625,
  "note": "Decoded from the transaction receipt. ERC-20 Transfer logs only (no ERC-721/1155, no internal ETH transfers). Token symbols are self-reported by each contract.",
  "rpc": {
    "kind": "public",
    "source": "base-rpc.publicnode.com"
  },
  "status": "success",
  "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "value": {
    "eth": 0,
    "wei": "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 $0.0045.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://1gateway.dev/v1/onchain/base/tx?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b'

# 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://1gateway.dev/v1/onchain/base/tx?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b' \
  | 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 $0.0045 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0045" });
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 $0.0045 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F1gateway.dev%2Fv1%2Fonchain%2Fbase%2Ftx
const res = await pay("https://1gateway.dev/v1/onchain/base/tx?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b");
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 $0.0045 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0045"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://1gateway.dev/v1/onchain/base/tx?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b")
    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 agoPassed402561 ms$0.0045
7 h agoPassed402521 ms$0.0045
11 h agoPassed402637 ms$0.0045
15 h agoPassed402199 ms$0.0045
19 h agoPassed402783 ms$0.0045
23 h agoPassed402881 ms$0.0045
26 h agoPassed402770 ms$0.0045
30 h agoPassed402830 ms$0.0045
33 h agoPassed402730 ms$0.0045
37 h agoPassed402886 ms$0.0045