what3words API Documentation | OpenAPI, Postman, LLMS Metadata

what3words API Docs: Developer resources, OpenAPI specs, and LLM integration guides for precise location technology. Last-Modified: 2026-03-02 # what3words Developer Documentation > **what3words** is a global addressing system that has divided the world into 3m squares, each with a unique 3 word address. This documentation provides comprehensive resources for developers integrating what3words technology into applications, websites, and services. ## HIGH-VALUE FAQ **Q:** *How do I add a 3 word address search box to my website?* **A:** Use the JavaScript AutoSuggest Component – see guide ➜ https://developer.what3words.com/tutorial/javascript-autosuggest-component **Q:** *How do I convert coordinates to a 3WA in code?* **A:** Call GET /convert‑to‑3wa in our REST API – see API docs ➜ https://developer.what3words.com/public-api/docs#convert-to-3wa **Q:** *Where do I get an API key?* **A:** Create one in the Developer Dashboard ➜ https://accounts.what3words.com/create-api-key **Q:** *How do I add the what3words Search box component to a Replit project?* **A:** Use the CDN version of the component to avoid vite.config issues ## GET STARTED This section provides essential resources for beginning your integration with what3words technology. - [Overview](https://developer.what3words.com/public-api) – Introduction to what3words API capabilities and integration options - [UX guidelines](https://developer.what3words.com/tutorial/ux-guidelines/) – Fundamental user experience considerations for integrating what3words - [Migrating an application from API V2 to API V3](https://developer.what3words.com/tutorial/migrating-an-application-from-api-v2-to-api-v3/) – Guide to transition applications from what3words API version 2 to version 3 ## SEARCH BOX Implement what3words address search functionality across different platforms with these integration guides. ### Web Search Box Add what3words address search to websites and web applications. -