Stop switching between webhook.site, Postman mocks, and json-server. API Dev Studio handles all three — offline, private, fast.
Point your app at localhost:3456/api/users and get back whatever JSON you define. No server code needed.
Get a public URL that tunnels to your machine. See every Stripe or GitHub webhook in real-time.
Proxy requests to production, save the responses, replay them offline. Build against real data without hitting rate limits.
No cloud account, no data leaving your laptop. Works on a plane.
Native desktop app, not Electron. Starts in under a second, handles thousands of requests.
Free tier to start. Pro for $49 one-time — no subscriptions, no recurring fees.
Build UI before the backend exists. Define your own responses, test edge cases, work offline.
Test Stripe, GitHub, or Twilio webhooks without deploying. Debug locally with real payloads.
Mock your backend on the same network. Test error states, slow responses, and edge cases.
Prototype and iterate on API shapes before writing backend code. Share mocks with your team.
| Feature | API Dev Studio | Postman | Mockoon | Insomnia | Bruno |
|---|---|---|---|---|---|
| Price | Free / $49 once | $19-49/user/mo | Free / $15/mo | Free / $6/user/mo | Free / ~$6/mo |
| Desktop app | ✓ | ✓ | ✓ | ✓ | ✓ |
| Local/offline | ✓ | ⚠ Partial | ✓ | ✓ | ✓ |
| Mock server | ✓ | ✓ | ✓ | ✗ | ✗ |
| Webhook catching | ✓ | ✗ | ✗ | ✗ | ✗ |
| Request proxying | ✓ | ⚠ Partial | ✗ | ✗ | ✗ |
| Record → Mock | ✓ Unique | ✗ | ✗ | ✗ | ✗ |
| MCP/AI integration | ✓ 18 tools | ✗ | ✗ | ✗ | ✗ |
| Privacy-first | ✓ | ✗ Cloud-first | ✓ | ⚠ | ✓ |
| One-time payment | ✓ $49 | ✗ Subscription | ✗ Subscription | ✗ Subscription | ✗ Subscription |
| Built with Rust | ✓ | ✗ Electron | ✗ Electron | ✗ Electron | ✗ Electron |
Free to start. Pay once for Pro — no subscriptions, no per-seat pricing, no surprises.
Explore and evaluate
one-time · lifetime license
Everything you need. Forever.
30-day money-back guarantee · One-time payment · No subscription
or $69/year (save 28%)
CI/CD & workflow power
Includes Pro license · Cancel anytime
Postman charges $19/user/month. Mockoon's cloud is $15/month. We think that's wrong for a desktop tool that runs entirely on your machine.
API Dev Studio runs locally. No cloud servers to maintain. No per-seat licensing. You pay once, you own it forever, and every v1.x update is included.
The free version is great for trying out API Dev Studio or small hobby projects. But if you're doing serious API development work, you'll quickly hit the limits.
Yes. You pay $49 once and own Pro forever. All v1.x updates included. No monthly fees. No renewals. No "gotchas."
Pro ($49 one-time) gives you the full desktop app with all features. Pro+ ($8/month) adds CLI tools for CI/CD pipelines, endpoint testing, load testing, and contract validation — features designed for teams who embed API Dev Studio in their workflow.
No. Pro has everything you need for the desktop experience. Pro+ is for developers who want CLI access and CI/CD integration.
Pro includes all v1.x updates for free. Major version upgrades (v2.0+) may be a separate purchase at a discounted upgrade price — but that's a long way off.
Perfect! Just buy a Pro license key and enter it in the app. It unlocks all Pro features instantly.
Yes! Pro includes commercial use. Build client projects, use it at work, whatever you need.
30-day money-back guarantee on Pro. No questions asked.
We're building team and enterprise features (shared projects, SSO, admin dashboard). Contact us if your organization is interested.
We're confident you'll love API Dev Studio. But if it's not right for you, just email us within 30 days for a full refund. No questions, no hassle.
Postman charges $19/user/month. API Dev Studio is $49 once — forever. Download the free version now, or go Pro when you're ready.
One-time payment · 30-day money-back guarantee · No subscription
Be the first to know when we launch on Product Hunt. Early subscribers get exclusive updates and tips.
No spam. Unsubscribe anytime.