ToolVet
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Lookup

by agent-tariff-lookup.iykykblog.workers.dev in Developer tools

x402 APIPassing, checked 5 h ago

Look up US import duty rates by HTS code or product description. Returns the base General (MFN) and Column 2 rates of duty from the official USITC Harmonized Tariff Schedule (public domain). Reference only: Section 301/232, IEEPA and other additional duties are not included.

POST
https://agent-tariff-lookup.iykykblog.workers.dev/lookup
Price
$0.08
per call in USDC
Uptime
100%
last 30 days
Response time
530 ms
702 ms slowest 5%
Last check
Passed
5 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://agent-tariff-lookup.iykykblog.workers.dev/lookup

Each call costs $0.08 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://agent-tariff-lookup.iykykblog.workers.dev/lookup
content-type: application/json

{
  "hts": "8708.21"
}

Parameters

ParameterTypeRequiredDescription
htsstringNoHTS code, with or without dots, e.g. '8708.21' or '8708210000'
querystringNoProduct description to search, e.g. 'lithium batteries'

Example response

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

{
  "found": true,
  "hts": "8708.21",
  "results": [
    {
      "column2_rate": "25%",
      "description": "Safety seat belts",
      "general_rate": "2.5%",
      "hts_number": "8708.21.00.00",
      "special_rate": "Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)",
      "unit_of_quantity": [
        "kg"
      ]
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.08.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent-tariff-lookup.iykykblog.workers.dev/lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"hts":"8708.21"}'

# 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://agent-tariff-lookup.iykykblog.workers.dev/lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"hts":"8708.21"}' \
  | 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 $0.08 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.08" });
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 $0.08 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent-tariff-lookup.iykykblog.workers.dev%2Flookup&method=POST
const res = await pay("https://agent-tariff-lookup.iykykblog.workers.dev/lookup", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "hts": "8708.21"
  }),
});
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 $0.08 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.08"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agent-tariff-lookup.iykykblog.workers.dev/lookup",
        json={
            "hts": "8708.21",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
5 h agoPassed402372 ms$0.08
10 h agoPassed402559 ms$0.08
14 h agoPassed402463 ms$0.08
19 h agoPassed402624 ms$0.08
23 h agoPassed402430 ms$0.08
Show 10 older checks
28 h agoPassed402398 ms$0.08
32 h agoPassed402599 ms$0.08
37 h agoPassed402523 ms$0.08
41 h agoPassed402930 ms$0.08
45 h agoPassed402412 ms$0.08
2 days agoPassed402493 ms$0.08
2 days agoPassed402461 ms$0.08
2 days agoPassed402680 ms$0.08
3 days agoPassed402626 ms$0.08
3 days agoPassed402561 ms$0.08