Geocode Address

{
  "asOf": "2026-10-11T04:46:53.582Z",
  "components": {
    "city": "WASHINGTON",
    "number": "1600",
    "state": "DC",
    "street": "PENNSYLVANIA AVE NW",
    "zip": "20500"
  },
  "county": "District of Columbia",
  "countyFips": "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.",
  "latitude": 38.898702605245,
  "longitude": -77.035189204737,
  "matchedAddress": "1600 PENNSYLVANIA AVE NW, WASHINGTON, DC, 20500",
  "matches": 1,
  "notChecked": [
    "whether the address is deliverable by the Postal Service",
    "rooftop accuracy (Census uses street address ranges)",
    "…2 more"
  ],
  "place": "Washington city",
  "reasons": [
    "Single match.",
    "Coordinates are interpolated along the street segment, not a surveyed rooftop point."
  ],
  "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",
  "stateFips": "11",
  "summary": "1600 PENNSYLVANIA AVE NW, WASHINGTON, DC, 20500: 38.89870, -77.03519, District of Columbia, DC.",
  "tractGeoid": "11001980000",
  "verdict": "MATCHED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://geo-us.x402tookit.com/geocode-address?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/geocode-address?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%2Fgeocode-address
const res = await pay("https://geo-us.x402tookit.com/geocode-address?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/geocode-address?address=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC+20500")
    print(res.status_code, res.text)