7 Free APIs Every Developer Should Bookmark (No Signup Required)

You know the drill: you need a quick API for IP geolocation, DNS lookup, or crypto prices. You find one, but it wants a credit card, a 3-page signup form, and your firstborn. Here are 7 APIs you can start using in 30 seconds. One key, 200 free credits, no credit card. Get Your API Key (30 seconds) curl -X POST https://agent-gateway-kappa.vercel.app/api/keys/create Response: { "key" : "gw_abc123..." , "credits" : 200 , "expiresAt" : "2026-04-03T21:41:12.675Z" } Save that key value. Every API call below costs 1 credit. 1. IP Geolocation Turn any IP address into a location — country, city, timezone, coordinates. Great for analytics dashboards, geo-targeting, or fraud detection. curl -H "Authorization: Bearer YOUR_KEY" \ "https://agent-gateway-kappa.vercel.app/v1/agent-geo/geo/8.8.8.8" { "ip" : "8.8.8.8" , "found" : true , "country" : "US" , "timezone" : "America/Chicago" , "latitude" : 37.751 , "longitude" : -97.822 , "eu" : false } Bonus endpoints: /geo/me — look up the caller's IP /geo/