trueleaf/apiflow

A modern API workspace that works both online and offline — combining API documentation, testing, mock, and AI-powered automation in one lightweight tool

What it solves

Apiflow is a free, open-source alternative to API development tools like Postman, Hoppscotch, and Insomnia. It eliminates the need for paid plans or feature limits while providing a comprehensive platform for testing, mocking, and documenting APIs.

How it works

It functions as a full-stack API development platform that supports RESTful HTTP, WebSocket, and Server-Sent Events (SSE). The tool is designed with a "local-first" philosophy, allowing users to work entirely offline with local persistence or switch to an online mode for team collaboration. It integrates with the OpenAPI 3.0 ecosystem for easy data migration and can be self-hosted via Docker for complete data control.

Who it’s for

Developers and engineering teams who need a powerful API client and collaboration tool that is free, supports self-hosting for private networks, and integrates AI capabilities into their workflow.

Highlights

  • Built-in AI Agent: Assists with API design, testing, and debugging, with support for custom LLM configurations and offline usage.
  • Local-First Design: Offers seamless bidirectional conversion between offline and online data.
  • Team Collaboration: Provides unlimited teams and members with role-based access control (RBAC) and project-level permissions.
  • OpenAPI Friendly: Full support for importing and exporting OpenAPI 3.x specifications.
  • Self-Hosted: One-click Docker deployment for enterprise and private network environments.

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