what3words

live Geo

3m × 3m grid geocoding using three-word addresses.

4 tools
0ms auth
free tier 50 calls/day

Tools

coords_to_words required: latitude, longitude

lat/lon → "word.word.word".

Parameters
Name Type Description
latitude req number Latitude
longitude req number Longitude
language opt string 2-letter language code
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words_to_coords required: words

"word.word.word" → lat/lon + bbox.

Parameters
Name Type Description
words req string Three-word address
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autosuggest required: input

Ranked completions for a partial three-word input.

Parameters
Name Type Description
input req string Partial three-word string
n_results opt number 1-100
focus_latitude opt number Bias toward this latitude
focus_longitude opt number Bias toward this longitude
country opt string ISO country code filter
language opt string 2-letter language
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list_languages

Supported languages for word output.

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash 
curl -X POST https://gateway.pipeworx.io/what3words/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash 
curl -X POST https://gateway.pipeworx.io/what3words/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"coords_to_words","arguments":{"latitude": 37.7749, "longitude": -122.4194}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript 
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("coords_to_words", {"latitude":"example","longitude":"example"});
ask_pipeworx 
// Or ask in plain English:
const answer = await px.ask("3m × 3m grid geocoding using three-word addresses");