Reverse geocode

Resolve a lat/lon to a structured postal address: road, house number, city, state, postcode, country (with ISO code). OpenStreetMap/Nominatim, no key. ?lat=38.8977&lon=-77.0365.

Input

Example output

{
  "lat": 38.8977,
  "lon": -77.0365,
  "displayName": "White House, 1600, Pennsylvania Avenue Northwest, Washington, District of Columbia, 20500, United States",
  "address": {
    "houseNumber": "1600",
    "road": "Pennsylvania Avenue Northwest",
    "city": "Washington",
    "state": "District of Columbia",
    "postcode": "20500",
    "country": "United States",
    "countryCode": "us"
  },
  "type": "attraction",
  "class": "tourism",
  "osm": "way/238241022",
  "source": "nominatim.openstreetmap.org (ODbL)"
}

Try it - see the 402 challenge (free)

curl -i "https://agent402.tools/api/reverse-geocode?lat=38.8977&lon=-77.0365"

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/reverse-geocode?lat=38.8977&lon=-77.0365");

Part of these workflows

This tool is one step in a curated multi-tool workflow - agents can fetch the whole sequence as an MCP prompt or call https://agent402.tools/api/skill-packs/{slug}/prompt.

• Location intel - Point at an address (or even a rough place name) and assemble the situational brief: precise coordinates, the canonical postal address, what's within walking distance, the live weather forecast, active NWS hazard alerts, and recent seismic activity. The deterministic 'what should I know about this place right now?' workup.

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