Reverse Geocode

{
  "asOf": "2026-10-11T04:46:55.638Z",
  "blockGeoid": "110019800001034",
  "blockGroupGeoid": "110019800001",
  "county": "District of Columbia",
  "countyGeoid": "11001",
  "countySubdivision": "Washington city",
  "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.",
  "lat": 38.8977,
  "lon": -77.0365,
  "notChecked": [
    "street address (this returns Census areas, not an address)",
    "points outside the US and its territories",
    "…1 more"
  ],
  "place": "Washington city",
  "placeGeoid": "1150000",
  "reasons": [
    "Census tract 9800 (GEOID 11001980000)."
  ],
  "schoolDistrict": "District of Columbia Public Schools",
  "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",
  "stateAbbr": "DC",
  "stateFips": "11",
  "summary": "38.8977, -77.0365 is in Washington city, District of Columbia, District of Columbia.",
  "tractGeoid": "11001980000",
  "verdict": "LOCATED",
  "zcta": "20006"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://geo-us.x402tookit.com/reverse-geocode?lat=38.8977&lon=-77.0365'

# 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/reverse-geocode?lat=38.8977&lon=-77.0365' \
  | 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%2Freverse-geocode
const res = await pay("https://geo-us.x402tookit.com/reverse-geocode?lat=38.8977&lon=-77.0365");
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/reverse-geocode?lat=38.8977&lon=-77.0365")
    print(res.status_code, res.text)