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Firecamp

Open-source multi-protocol API client

open-sourceopen sourceupdated Apr 21, 2026
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Firecamp is an open-source API DevTool supporting REST, GraphQL, WebSocket, and Socket.IO protocols as a lightweight alternative to Postman. It provides IntelliSense, team collaboration with shared workspaces, and seamless import from OpenAPI, Insomnia, AsyncAPI, and HAR formats. Each protocol gets a dedicated testing playground with response metrics including time, size, and status codes.

Firecamp positions itself as a developer-first API testing tool that supports the full spectrum of modern API protocols in a single interface. While most API clients focus primarily on REST, Firecamp provides dedicated playgrounds for GraphQL with schema introspection, WebSocket connections with bidirectional messaging, and Socket.IO with visual monitoring of emitters and listeners. Each playground shows response metrics including timing, payload size, and status codes for comprehensive testing feedback.

The collaboration features allow teams to create shared workspaces where API definitions, test collections, and execution history stay synchronized. Import support covers OpenAPI and Swagger specifications, Insomnia exports, AsyncAPI schemas, and HAR files, making migration from other tools straightforward and reducing vendor lock-in concerns. The lightweight architecture keeps resource consumption low compared to Electron-based alternatives, making it practical for developers running multiple tools simultaneously.

As an open-source project, Firecamp offers transparency and community-driven development while maintaining a polished user experience. No complex setup or account creation is required to start testing APIs, and the tool works equally well for solo developers prototyping endpoints and teams collaborating on complex API integration projects.

Pricing

Open source, free self-hosted

Platforms

Web-based, desktop app available

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