Everything you need to edit an OpenAPI spec. Nothing you don't.
Built across 8 development phases and 45+ GitHub issues. Every feature solves a real problem.
Visual Flow Builder
Your API paths, visualized as an interactive node graph. Each path segment becomes a node, each endpoint a leaf.
- Interactive path tree visualization
- Zoom, pan, and minimap navigation
- 4 layout algorithms: layered, stress, box, compact
- Click any endpoint to open the editor
- Custom segment and endpoint nodes
Flow Builder
Flow Builder Screenshot
Full Spec Editor
Edit every part of your OpenAPI spec through intuitive forms. No more hand-editing YAML.
- Info, servers, paths, parameters, request bodies, responses
- Security scheme configuration
- Tags and component management
- Raw JSON/YAML mode with Monaco Editor
- Auto-save with undo/redo
Spec Editor
Spec Editor Screenshot
Built-in API Execution
Test your endpoints right from the editor. Server-side proxy means no CORS headaches.
- Server-side proxy eliminates CORS issues
- Full request/response viewer with syntax highlighting
- Execution history with 7-day retention (free) or 30-day (pro)
- Pin and save important responses
- Play button directly in flow nodes
API Executor
API Executor Screenshot
Team Workspaces
Work together on API specs with role-based access control.
- Three roles: Owner, Editor, Viewer
- Email-based invitations
- Role-based access control (RBAC)
- Credential vault for shared secrets
- Multiple workspaces per account
Workspaces
Workspaces Screenshot
Public Spec Hotlinks
Share your specs with a single URL. Edge-cached for instant global access.
- Serve specs as JSON or YAML
- Edge-cached via Cloudflare KV
- Custom slug URLs
- Private specs with access tokens
- CORS-enabled for external tools
Public Hotlinks
Hotlinks Screenshot
Import & Conversion
Bring your existing specs from anywhere. We handle the conversion.
- Upload JSON/YAML files
- Import from URL
- Paste raw spec content
- Postman collection import
- Automatic Swagger 2.0 → OpenAPI 3.0 conversion
Import & Conversion
Import Screenshot
And there's more
Header Profiles
Save and reuse authentication headers across requests.
Dark Mode
System-aware theme with manual toggle.
Onboarding Wizard
Step-by-step tutorial for new users.
Feedback System
Report bugs and request features in-app.
Admin Dashboard
User management and system monitoring.
Under the hood
| Technology | Purpose |
|---|---|
| Astro 5 | Framework + SSR |
| React 19 | Interactive islands |
| @xyflow/react | Flow visualization |
| ELK.js | Graph layout algorithms |
| Cloudflare Pages | Edge hosting |
| D1 | SQLite database |
| KV | Edge cache |
| R2 | Blob storage |
| Tailwind CSS | Styling |
| nanostores | State management |
| Drizzle ORM | Database queries |
| Zod | Input validation |
Your API specs won't design themselves.
Join developers who chose simplicity.