Geocode address

Resolve a free-form address or place name to coordinates: lat/lon, display name, bounding box, place type. OpenStreetMap/Nominatim, no key. ?q=1600+Pennsylvania+Ave+Washington+DC&limit=1.

Input

Field	Type	Description
q *	string	Free-form address or place name
limit	number	Results to return, 1-10 (default 1)
countryCodes	string	Comma-separated ISO-3166-1 alpha-2 codes to restrict, e.g. us,ca (optional)

Example output

{
  "query": "1600 Pennsylvania Ave NW, Washington, DC",
  "count": 1,
  "results": [
    {
      "displayName": "White House, 1600, Pennsylvania Avenue Northwest, Washington, District of Columbia, 20500, United States",
      "lat": 38.8976633,
      "lon": -77.0365739,
      "type": "attraction",
      "class": "tourism",
      "importance": 0.78,
      "osm": "way/238241022",
      "boundingBox": {
        "south": 38.8974908,
        "north": 38.897829,
        "west": -77.0368537,
        "east": -77.0362519
      }
    }
  ],
  "source": "nominatim.openstreetmap.org (ODbL)"
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/geocode?q=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC&limit=1"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/geocode?q=1600+Pennsylvania+Ave+NW%2C+Washington%2C+DC&limit=1");

No wallet? Pay with compute

This is a pure-CPU tool, so an agent without a wallet can pay with proof-of-work instead of USDC: fetch a challenge, solve the sha256 puzzle (16 leading zero bits — a fraction of a second of CPU, no money, no AI tokens), and resend with the X-Pow-Solution header.

import { createHash } from "node:crypto";
const lz = (b) => { let t = 0; for (const x of b) { if (!x) { t += 8; continue; } t += Math.clz32(x) - 24; break; } return t; };
const c = await (await fetch("https://agent402.tools/api/pow/challenge?slug=geocode")).json();
let n = 0;
while (lz(createHash("sha256").update(c.challenge + ":" + n).digest()) < c.difficulty) n++;
await fetch("https://agent402.tools/api/geocode", { method: "GET", headers: { "X-Pow-Solution": c.token + ":" + n } });

Related tools