What's free
10 free production calls on the Remove Background API (one-time) plus 1,000 sandbox calls/month on the Image Editing API (watermarked)
Rate limits
1,000 sandbox calls/month; 10 one-time production calls
The catch
No credit card required. Sandbox output is watermarked (for testing); the 10 production calls return clean output. Image editing/generation (AI backgrounds, relighting, shadows).