/API TERMS
API Terms/Geo & Location/What3Words

What3Words

what3words.com

Converts three-word addresses to geographic coordinates and vice versa, with an AutoSuggest function to validate and correct user input.

The What3Words API uses API key authentication; has freemium pricing; offers a free tier (Free plan: US$0.00 with AutoSuggest limited to 5 requests per second); rate limits: Free plan AutoSuggest limited to 5 requests per second; fair usage policy applies to all plans. Verified 2026-07-26 with per-field source links.

Geo & Location Verified 2026-07-26 medium confidence
Base URL
not documented null
no source
Auth
API key
developer.what3words.com ↗
Free tier
Free plan: US$0.00 with AutoSuggest limited to 5 requests per second
what3words.com ↗
Pricing model
freemium
what3words.com ↗
Pricing
Free $0; $9.99/mo for 1,000 conversions; $45/mo for 10,000; $125/mo for 30,000; $300/mo for 75,000; Enterprise for higher volumes
what3words.com ↗
Rate limits
Free plan AutoSuggest limited to 5 requests per second; fair usage policy applies to all plans
what3words.com ↗
OpenAPI spec
not documented null
no source
MCP server
not documented null
no source