what3words

what3words Public API

REST API for converting between three-word addresses and latitude / longitude coordinates, with AutoSuggest, available-languages, and grid-section endpoints. JSON or GeoJSON response formats. Authenticated via the X-Api-Key header or a key query parameter.

GitHub

Documentation

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Documentation
https://developer.what3words.com/public-api/docs

Other Resources

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Repository
https://github.com/what3words/what3words-api-docs
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APIsJSON
https://raw.githubusercontent.com/api-evangelist/what3words/refs/heads/main/apis.yml

OpenAPI Specification

what3words-openapi.yml Raw ↑