OpenAPI Integration
The most comprehensive OpenAPI implementation in any HTTP client.
5-Minute Quick Start
Start HereGet up and running with OpenAPI in Tigrister in just a few steps.
Create New Project
Click "New Project" in the sidebar. Select "Import OpenAPI" tab.
Import a Spec
Paste this URL and click Import:https://petstore3.swagger.io/api/v3/openapi.json
Start Testing
Select a module (pet, store, user). Click an endpoint. Hit Send!
That's it! You now have a fully functional API project. Any changes you make sync back to the OpenAPI spec automatically.
What is OpenAPI?
OpenAPI (formerly Swagger) is the industry standard for describing REST APIs. It defines your API's endpoints, parameters, request bodies, responses, security, and more in a single specification file.
Tigrister's Approach
Unlike other tools that treat OpenAPI as a simple import/export feature, Tigrister deeply integrates OpenAPI with its Project system. Your project IS an OpenAPI spec, and every change syncs both ways automatically.
Bi-Directional Synchronization
This is what makes Tigrister unique. Changes flow in both directions:
Modules, Endpoints
YAML / JSON
1Project to Spec
- Add an endpoint in Tigrister
- Edit request parameters
- Set up authentication
- Configure assertions
OpenAPI spec updates automatically
2Spec to Project
- Edit YAML/JSON in designer
- Add paths in visual editor
- Modify schemas
- Update security schemes
Project structure updates automatically
Supported Versions
Auto-converted to 3.0.3 on import
Full support (3.0.0 - 3.0.4)
Full support (3.1.0 - 3.1.2)
Latest version supported
Version Conversion
Tigrister can convert between OpenAPI 3.x versions (3.0 ↔ 3.1 ↔ 3.2). Swagger 2.0 specs are automatically upgraded to OpenAPI 3.0.3 on import. Features not available in older versions (like webhooks) are handled gracefully.
How It Works
Create or Import a Project
Start fresh or import an existing OpenAPI/Swagger spec.
Work in Your Preferred Mode
Use Area mode for testing requests, or Designer mode for API design.
Everything Stays in Sync
Changes in any mode automatically update the underlying OpenAPI spec.
Export Anytime
Export your spec as YAML or JSON, in any supported version.
Key Concepts
| OpenAPI Term | Tigrister Equivalent | Description |
|---|---|---|
| tags | Modules | Logical groupings of endpoints |
| paths + operations | Endpoints | API endpoints (GET /users, POST /orders) |
| servers | Servers | Base URLs for the API |
| components/schemas | Schemas | Reusable data models |
| securitySchemes | Security Schemes | Auth methods (API key, OAuth, etc.) |
| webhooks | Webhooks | Outbound API calls (3.1 only) |
Tigrister Extensions
Tigrister adds custom extensions to preserve app-specific data in your OpenAPI spec:
Compatibility
These extensions follow the OpenAPI specification's extension format (x-*). Other tools will ignore them, so your exported specs remain fully compatible.
Why Choose Tigrister for OpenAPI?
See how Tigrister compares to other popular tools for OpenAPI workflows:
| Feature | Tigrister | Postman | Insomnia |
|---|---|---|---|
| Import OpenAPI specs | Yes | Yes | Yes |
| Export OpenAPI specs | Yes | Yes | Yes |
| Bi-directional sync | Yes | One-way | One-way |
| Visual spec designer | Yes | No | No |
| Code editor with validation | Yes | Limited | No |
| Swagger UI preview | Built-in | No | Limited |
| OpenAPI 3.2 support | Yes | No | No |
| Version conversion | 2.0 → 3.x, 3.x ↔ 3.x | Import only | Limited |
| Project IS the spec | Yes | No | No |