# what3words Public API

**Canonical:** https://apis.io/apis/what3words/public-api/  
**Provider:** what3words — https://apis.io/providers/what3words/  
**Base URL:** https://api.what3words.com/v3  
**Documentation:** https://developer.what3words.com/public-api/docs

what3words Public API is one of 20 APIs that [what3words](https://apis.io/providers/what3words/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include REST API, Geocoding, and Addressing. The published artifact set on APIs.io includes API documentation.

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.

## Machine-readable artifacts (3)

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

## Other what3words APIs (12)

- [what3words convert-to-3wa Endpoint](https://apis.io/apis/what3words/convert-to-3wa/)
- [what3words convert-to-coordinates Endpoint](https://apis.io/apis/what3words/convert-to-coordinates/)
- [what3words AutoSuggest Endpoint](https://apis.io/apis/what3words/autosuggest/)
- [what3words available-languages Endpoint](https://apis.io/apis/what3words/available-languages/)
- [what3words grid-section Endpoint](https://apis.io/apis/what3words/grid-section/)
- [what3words JavaScript SDK](https://apis.io/apis/what3words/javascript-sdk/)
- [what3words Python SDK](https://apis.io/apis/what3words/python-sdk/)
- [what3words Java SDK](https://apis.io/apis/what3words/java-sdk/)
- [what3words PHP SDK](https://apis.io/apis/what3words/php-sdk/)
- [what3words Swift SDK](https://apis.io/apis/what3words/swift-sdk/)
- [what3words Android SDK](https://apis.io/apis/what3words/android-sdk/)
- [what3words Swift Map Components](https://apis.io/apis/what3words/swift-components-map/)

## Tags

REST API, Geocoding, Addressing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/what3words/public-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/what3words/.