Metro Area

{
  "asOf": "2026-10-11T04:46:54.454Z",
  "combinedStatisticalArea": {
    "code": "548",
    "name": "Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA"
  },
  "county": "District of Columbia",
  "countyGeoid": "11001",
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "metroOrMicroArea": {
    "code": "47900",
    "name": "Washington-Arlington-Alexandria, DC-VA-MD-WV Metro Area"
  },
  "notChecked": [
    "population or demographics",
    "commuting zones",
    "…1 more"
  ],
  "reasons": [
    "Part of the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA."
  ],
  "setting": "urban cluster or urban area",
  "source": "US Census Bureau Geocoder. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.",
  "sourceUrl": "https://geocoding.geo.census.gov/geocoder",
  "state": "District of Columbia",
  "summary": "District of Columbia, DC: in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metro Area; urban area Washington--Arlington, DC--VA--MD Urban Area.",
  "urbanArea": {
    "code": "92242",
    "name": "Washington--Arlington, DC--VA--MD Urban Area"
  },
  "verdict": "IN_METRO"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://geo-us.x402tookit.com/metro-area?address=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC+20500'

# 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://geo-us.x402tookit.com/metro-area?address=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC+20500' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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%2Fgeo-us.x402tookit.com%2Fmetro-area
const res = await pay("https://geo-us.x402tookit.com/metro-area?address=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC+20500");
console.log(res.status, await res.text());

# 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.get("https://geo-us.x402tookit.com/metro-area?address=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC+20500")
    print(res.status_code, res.text)