Insomnia

✓ Verified

★★★★★

(4.7) $12 Freemium ✓ Free Trial Available

Desktop

API client for testing REST, GraphQL, gRPC, SOAP, WebSocket, SSE and MCP workflows.

Best For: Developers testing, designing and debugging APIs

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The Verdict: Insomnia

Insomnia is a strong API client for developers who need multi-protocol testing and a clean request workflow. The free plan is useful, and the paid plans make sense when a team needs Git sync, RBAC, mock limits and enterprise controls.

The weakness is that Insomnia is still a developer tool. Non-technical users may find it too detailed. But for API design, testing and debugging, it is one of the stronger tools in this category.

What is Insomnia?

Insomnia is a desktop API client for testing, debugging and designing APIs. It supports common API formats and protocols, including HTTP, REST, gRPC, GraphQL, WebSocket, SOAP and SSE.

In practical testing, Insomnia feels best when you work with many requests, environments and API specs. You can keep projects local, sync through Git, or use cloud collaboration depending on your team setup. That flexibility matters more than people think when API collections include tokens, private endpoints and production variables.

Insomnia is mainly for developers, QA engineers, backend teams and API platform teams. It is not a no-code automation tool. It works best when you already understand API requests, headers, authentication and response testing.

Who is Insomnia Best For?

Developers testing, designing and debugging APIs

Insomnia Key Features

REST API client

GraphQL client

gRPC client

SOAP support

WebSocket support

SSE support

MCP client

API spec editor

OpenAPI linting

Pre-request scripting

After-response scripting

Mock server requests

Git sync

Local Scratch Pad

Insomnia Pricing & Plans

Insomnia Review Summary

Performance Score	A
Content Quality	Strong for API debugging, request collections, environments, protocol testing and developer workflows.
Interface	The desktop interface is practical for developers who need collections, environments, scripts and test runs in one place.
AI Technology	Insomnia includes AI-native API testing features and MCP client support for newer agent related workflows.
Purpose	It helps developers design, test and debug APIs before production.
Compatibility	Desktop
Pricing Summary	Insomnia has a free Essentials plan, Pro at $12 per user per month and Enterprise at $45 per user per month.