POST Server-side
API Calls
From your backend with an API key. Batches of up to 16 lookups per request and the larger monthly quota.
GET Browser
CORS / Web Calls
Straight from the browser from a registered domain. No API key, no backend, one lookup per request.
Running into quota or rate limits? Units & billing explains how units work and how to add or remove them mid-period.
Not sure which one fits? Client-side CORS vs. backend API compares latency, quota and security.