ToolVet
78trust / 100

Tx Receipt Verify

by ReceiptSure in Onchain & crypto

x402 APIPassing, checked 3 h ago

Check whether a mined Base transaction did what your agent meant it to do. Fetches the receipt, decodes its ERC-20, ERC-721 and ERC-1155 transfer and approval logs, and reports each declared movement as matched, missing or short, with the observed amount beside the expected one. Catches reverts, success with no effect, fee-on-transfer skims and transfers to recipients you never named. Returns unknown rather than guessing. Not a guarantee that a transaction was safe.

POST
https://receipt.schemasure.com/v1/tx/receipt-verify
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
357 ms
479 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

How to call it

POST https://receipt.schemasure.com/v1/tx/receipt-verify

Each call costs $0.02 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.

POST https://receipt.schemasure.com/v1/tx/receipt-verify
content-type: application/json

{
  "expected_transfers": [
    {
      "amount": "10000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "from": "0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4",
      "to": "0x5d3e1a9b7c2f4e8a0b6d3c5f9e1a7b4d2c8f0a6e"
    }
  ],
  "tx_hash": "0x7f1c3a58e0b94d26c5af7318d0e42b96c1d85f0a3b72e648d9c05147ae2b6f30"
}

Parameters

ParameterTypeRequiredDescription
expected_transfersarray of objectYesWhat you intended to move. Each entry is checked against the decoded logs and reported as matched, missing, short, or unverifiable.
tx_hashstringYesThe Base transaction to check. A hash with no receipt yet answers unknown.

Example response

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

Example response, 49 lines
{
  "confidence": 1,
  "data_versions": {
    "denylist": "2026-08-03.1",
    "event_abis": "2026-09-19.1",
    "policy": "2026-09-19"
  },
  "ok": true,
  "policy_version": "2026-09-19",
  "request_hash": "sha256:3f9c…a71e",
  "result": {
    "effect": {
      "has_logs": true,
      "silent_success": false
    },
    "fee_on_transfer": [
      {
        "implied_fee_percent": "1.00%",
        "skimmed_base_units": "100"
      }
    ],
    "receipt": {
      "log_count": 2,
      "status": "success"
    },
    "revert": {
      "reason": null,
      "reverted": false
    },
    "transfer_checks": [
      {
        "amounts": {
          "expected_base_units": "10000",
          "observed_base_units": "9900",
          "shortfall_base_units": "100"
        },
        "status": "amount_mismatch"
      }
    ],
    "unexpected_recipients": [],
    "unresolved": []
  },
  "risk_codes": [
    "AMOUNT_MISMATCH",
    "FEE_ON_TRANSFER_SKIM"
  ],
  "verdict": "block",
  "warnings": []
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://receipt.schemasure.com/v1/tx/receipt-verify' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_transfers":[{"amount":"10000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","from":"0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4","to":"0x5d3e1a9b7c2f4e8a0b6d3c5f9e1a7b4d2c8f0a6e"}],"tx_hash":"0x7f1c3a58e0b94d26c5af7318d0e42b96c1d85f0a3b72e648d9c05147ae2b6f30"}'

# 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 - -X POST 'https://receipt.schemasure.com/v1/tx/receipt-verify' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_transfers":[{"amount":"10000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","from":"0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4","to":"0x5d3e1a9b7c2f4e8a0b6d3c5f9e1a7b4d2c8f0a6e"}],"tx_hash":"0x7f1c3a58e0b94d26c5af7318d0e42b96c1d85f0a3b72e648d9c05147ae2b6f30"}' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Freceipt.schemasure.com%2Fv1%2Ftx%2Freceipt-verify&method=POST
const res = await pay("https://receipt.schemasure.com/v1/tx/receipt-verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "expected_transfers": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "from": "0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4",
        "to": "0x5d3e1a9b7c2f4e8a0b6d3c5f9e1a7b4d2c8f0a6e"
      }
    ],
    "tx_hash": "0x7f1c3a58e0b94d26c5af7318d0e42b96c1d85f0a3b72e648d9c05147ae2b6f30"
  }),
});
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://receipt.schemasure.com/v1/tx/receipt-verify",
        json={
            "expected_transfers": [
                {
                    "amount": "10000",
                    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                    "from": "0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4",
                    "to": "0x5d3e1a9b7c2f4e8a0b6d3c5f9e1a7b4d2c8f0a6e",
                },
            ],
            "tx_hash": "0x7f1c3a58e0b94d26c5af7318d0e42b96c1d85f0a3b72e648d9c05147ae2b6f30",
        },
    )
    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 agoPassed402325 ms$0.02
7 h agoPassed402450 ms$0.02
11 h agoPassed402443 ms$0.02
15 h agoPassed402395 ms$0.02
19 h agoPassed402483 ms$0.02
Show 10 older checks
23 h agoPassed402330 ms$0.02
27 h agoPassed402357 ms$0.02
31 h agoPassed402434 ms$0.02
34 h agoPassed402440 ms$0.02
38 h agoPassed402337 ms$0.02
42 h agoPassed402320 ms$0.02
45 h agoPassed402274 ms$0.02
2 days agoPassed402334 ms$0.02
2 days agoPassed402298 ms$0.02
2 days agoPassed402457 ms$0.02