Insomnia Core is a cross-platform API client for testing and debugging REST, GraphQL, and other web APIs. It allows developers to send requests, inspect responses, and manage API workflows in a single interface.
Insomnia Core supports HTTP requests with full control over URLs, headers, payloads, and authentication. Users can instantly view response details such as status codes, response bodies, headers, cookies, and timing information.
It is widely used for API development, testing, and collaboration, and includes support for environments, variables, and reusable configuration to simplify switching between development and production setups.
Key Features
- REST and GraphQL API testing
- Request builder with headers, body, and auth support
- Environment variables and configuration reuse
- Response viewer (status, headers, cookies, body)
- Code snippet generation (cURL, Python, Node.js, Java, etc.)
- Plugin system with extensibility
- Import/export collections (Swagger, OpenAPI, cURL, HAR)
- SSL certificate and proxy support
- Request history tracking
- Multi-format response preview (JSON, HTML, images)
Collaboration & Workflow
Insomnia Core supports team collaboration with project sharing, environment syncing, and version control integration. It can also store data locally or connect with Git workflows for better control over API projects.
Interface
The interface is clean and developer-focused, with a request editor on one side and a response viewer on the other. Users can organize APIs into folders, workspaces, and environments for better structure and workflow management.
Pricing
- Hobby (Free): Basic API testing and collaboration features
- Pro ($12/user/month): Advanced team features, Git integration, RBAC
- Enterprise ($45/user/month): SSO, advanced security, self-hosting, enterprise support
Pros
- Strong support for REST and GraphQL APIs
- Clean and intuitive interface
- Powerful environment management
- Wide plugin ecosystem
- Good for both solo developers and teams
Cons
- Advanced features require paid plans
- Can be heavy for simple API testing
- Collaboration features are gated behind subscription
Best for
Developers and teams who need a structured, flexible API client for designing, testing, and managing REST or GraphQL APIs efficiently.
