AI → spec in seconds
Plain English in: a valid OpenAPI document and sample responses out. Iterate without wrestling YAML.
AI-powered APIs
Build your API in seconds, not hours
Describe your API in plain language. Get a live, working REST API instantly. No code, no schema wrangling—just describe and use.
Generate a realistic API from a sentence — and test real-world behavior instantly.
Tweak your API anytime with an intuitive editor. No YAML, no complexity.
All features unlocked on the free plan. No credit card required.
Subdomain (optional)
When you create a project, you choose this slug. It is the first part of your public base URL — https://your-subdomain.api… — so every request hits your mock API on that host.
API endpoint
https://demo-store.api.simulapi.app/:endpoint
🔍 No resources yet.
Demo only — Sign up to create real projects and live endpoints on your subdomain.
Why SimulAPI
From a sentence to a URL you can call
SimulAPI is a mock-API builder: describe resources once, get OpenAPI plus a hosted base URL with believable JSON — built for demos, QA, and parallel frontend work.
REST that behaves like production
Verbs, paths, status codes, and JSON bodies that match your schema — so clients and tests see realistic data.
One URL per project
Your own subdomain under our API host. Share it with teammates or wire it into apps and CI — no deploy step.
Simple pricing when you need more
Start free — upgrade when your usage grows.
Free
$0forever
Perfect for trying out SimulAPI
- 1 project
- 2 resources
Pro Monthly
$10/month
For developers who need more
- 100 AI credits
- 20 projects
- 50 resources
Pro Yearly
$100/year
Best value
- 100 AI credits
- 20 projects
- 50 resources
- Save $20/year