reverseGeocode.ts•1.37 kB
import { z } from "zod";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
export function registerReverseGeocode(server: McpServer) {
server.tool(
"reverse-geocode",
"Convert coordinates to an address using OpenStreetMap Nominatim",
{
lat: z.string().describe("Latitude"),
lon: z.string().describe("Longitude"),
},
async ({ lat, lon }) => {
const url = `https://nominatim.openstreetmap.org/reverse?format=json&lat=${encodeURIComponent(lat)}&lon=${encodeURIComponent(lon)}`;
const ctrl = new AbortController();
const id = setTimeout(() => ctrl.abort(), 8000);
try {
const res = await fetch(url, {
headers: { "User-Agent": "mcp/1.0" },
signal: ctrl.signal,
});
const data = await res.json();
const result = {
display_name: data.display_name,
address: data.address,
};
return {
content: [
{
type: "text",
text: JSON.stringify(result, null, 2),
},
],
};
} catch (err: any) {
return {
content: [
{
type: "text",
text: JSON.stringify({ error: err.message }),
},
],
};
} finally {
clearTimeout(id);
}
}
);
}