ToolVet
72trust / 100

Base Usdc Transfer Check

by Oblique Markets in Markets & finance

x402 APIPassing, checked 8 h ago

Use when an agent needs base usdc transfer check. Returns Verify a Base mainnet transaction moved USDC: decodes all USDC Transfer logs from the receipt and reports settled=true only for a mined, successful tx with at least one transfer. $0.004.

GET
https://api.oblique.markets/api/v1/paid/base-usdc-transfer-check
Price
$0.004
per call in USDC
Uptime
100%
last 30 days
Response time
339 ms
501 ms slowest 5%
Last check
Passed
8 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://api.oblique.markets/api/v1/paid/base-usdc-transfer-check

Each call costs $0.004 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://api.oblique.markets/api/v1/paid/base-usdc-transfer-check?tx=Transaction+hash+to+verify%2C+0x-prefixed+64+hex+chars

Parameters

ParameterTypeRequiredDescription
txstringYesTransaction hash to verify, 0x-prefixed 64 hex chars

Example response

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

{
  "as_of": "2026-08-10T12:00:00.000Z",
  "block_number": 33712501,
  "found": true,
  "settled": true,
  "status": "success",
  "transfers": [
    {
      "amount_atomic": "3000",
      "amount_usdc": "0.003000",
      "from": "0x9d6cd21e921a30fbd077ab54c1c7ecfdd0e94b41",
      "to": "0x36f2f97ec1eab00dcecff09e3e5dcbd2af11001a"
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.oblique.markets/api/v1/paid/base-usdc-transfer-check?tx=Transaction+hash+to+verify%2C+0x-prefixed+64+hex+chars'

# 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://api.oblique.markets/api/v1/paid/base-usdc-transfer-check?tx=Transaction+hash+to+verify%2C+0x-prefixed+64+hex+chars' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.oblique.markets%2Fapi%2Fv1%2Fpaid%2Fbase-usdc-transfer-check
const res = await pay("https://api.oblique.markets/api/v1/paid/base-usdc-transfer-check?tx=Transaction+hash+to+verify%2C+0x-prefixed+64+hex+chars");
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.oblique.markets/api/v1/paid/base-usdc-transfer-check?tx=Transaction+hash+to+verify%2C+0x-prefixed+64+hex+chars")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
8 h agoPassed402248 ms$0.004
18 h agoPassed402224 ms$0.004
29 h agoPassed402535 ms$0.004
39 h agoPassed402442 ms$0.004
2 days agoPassed402461 ms$0.004
Show 10 older checks
2 days agoPassed402489 ms$0.004
2 days agoPassed402336 ms$0.004
3 days agoPassed402366 ms$0.004
3 days agoPassed402432 ms$0.004
3 days agoPassed402360 ms$0.004
3 days agoPassed402333 ms$0.004
3 days agoPassed402389 ms$0.004
3 days agoPassed402388 ms$0.004
4 days agoPassed402313 ms$0.004
4 days agoPassed402122 ms$0.004