Rex API v3

REST API for apps, bots
and creative tools

Build features faster with one simple API for screenshots, image tools, quote cards, captions, and bot utilities — documented, secured with JWT, and ready to use from your dashboard.

Get your free API key → Explore the docs
What's included

Useful endpoints for real projects

Rex API gives you ready-to-use endpoints for apps, bots, dashboards, automation workflows, and creative tools — all documented and protected with fair usage limits.

Screenshot API

Capture public web pages as clean PNG or JPEG images with custom viewport, full-page capture, and light or dark mode support.

GET /api/screenshot

Caption Generator

Create brat-style captions in PNG, JPEG, animated GIF, or WebP format for bots, stickers, social posts, and image-based tools.

GET /api/brat

Quote Card API

Generate clean quote cards with custom themes, fonts, accent colors, profile details, and verified badges.

GET /api/quote

And Much More

Explore more utilities for media, stickers, image processing, and bot automation — all available through one simple REST API.

more tools
Pricing

Start free. Scale when you need more.

Try Rex API without an account, or sign in to get a personal API key, higher daily quota, and a usage dashboard for your apps and bots.

Anonymous

15 requests / day per IP

No sign-up required. Test public endpoints directly from the dashboard.

  • Access to public endpoints
  • 15 requests per day
  • Limit applies per IP address
Try without signing in
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Registered

150 requests / day

Create a free account to get your own API key for production apps, bots, and tools.

  • Personal rex_… API key
  • 150 requests per day
  • Rotate or revoke keys anytime
  • Live usage dashboard
Create free account