ToolVet
75trust / 100

Validate

by Validate a postal code in Weather & location

x402 APIPassing, checked 2 h ago

Check whether a postal / ZIP code is well-formed for a country (ISO 3166-1 alpha-2). A malformed code is a successful result with `valid:false`, not an error — only an unsupported country or empty code is a 400.

POST
https://postal.openverbs.com/v1/validate
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
562 ms
662 ms slowest 5%
Last check
Passed
2 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

How to call it

POST https://postal.openverbs.com/v1/validate

Each call costs $0.002 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://postal.openverbs.com/v1/validate
content-type: application/json

{
  "code": "94105",
  "country": "US"
}

Parameters

ParameterTypeRequiredDescription
codestringYesPostal / ZIP code to validate.
countrystringYesISO 3166-1 alpha-2 country code, e.g. "US" ("UK" accepted as an alias for GB).

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://postal.openverbs.com/v1/validate' \
  -H 'content-type: application/json' \
  --data-raw '{"code":"94105","country":"US"}'

# 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://postal.openverbs.com/v1/validate' \
  -H 'content-type: application/json' \
  --data-raw '{"code":"94105","country":"US"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpostal.openverbs.com%2Fv1%2Fvalidate&method=POST
const res = await pay("https://postal.openverbs.com/v1/validate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "code": "94105",
    "country": "US"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://postal.openverbs.com/v1/validate",
        json={
            "code": "94105",
            "country": "US",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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2 h agoPassed402561 ms$0.002
6 h agoPassed402662 ms$0.002
10 h agoPassed402557 ms$0.002
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18 h agoPassed402548 ms$0.002
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22 h agoPassed402522 ms$0.002
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