Geocoding — entry 076 of 80
What3Words
What3Words divides the entire globe into a grid of 3-by-3-meter squares, each permanently assigned a unique three-word address, and its API converts between those addresses and standard coordinates while also offering an AutoSuggest endpoint that corrects and validates user-typed 3-word input. Access requires an API key, and free-tier use is effectively limited to AutoSuggest (5 requests/second) with no included coordinate conversions — actual convert-to-coordinates/convert-to-3wa volume needs a paid plan starting at $9.99/month for 1,000 conversions. Emergency services and NGOs can apply for free or discounted access.
GreatAPIs Score
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<a href="https://greatapis.com/api/what3words/"><img src="https://greatapis.com/badge/what3words.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Get a key at the provider
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Try it
Developer reference
https://api.what3words.com/v3Free tier: AutoSuggest only (5 req/sec); coordinate conversion requires a paid plan from $9.99/month
- GET/convert-to-coordinates
- GET/convert-to-3wa
- GET/autosuggest