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kalil0321/reverse-api-engineer

Captures a website's network traffic while you or an AI agent browse, then generates a typed API client for the endpoints it uses.

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What is it?

Reverse API Engineer turns a website into an API. You give it a site and a goal, such as fetching all job listings from a careers page. A browser visits the site, either driven manually or by an AI agent, and the network traffic is recorded to a HAR file. A configured model then reads that traffic and writes a working client for the endpoints the site actually calls, instead of copying requests out of DevTools by hand.

The generated client can be written in Python, JavaScript, TypeScript, Go, Java, C#, PHP, Ruby, C, or PowerShell. Agent capture works through Playwright or Chrome DevTools MCP servers, or the Vercel agent-browser CLI, and can use your real Chrome session with its existing cookies. Manual mode uses a local Playwright browser. The project also ships a skill for Claude Code, Codex, Cursor and OpenCode, and a collector mode that gathers structured JSON or CSV data.

The generated code runs on your machine, so the README advises reviewing it before execution. Sites with aggressive bot detection may block capture or require manual interaction.

Key features

  • 01Records browser network traffic to a HAR file during capture.
  • 02Generates a typed API client in ten languages, including Python, Go and TypeScript.
  • 03Supports manual browsing or autonomous AI agent capture.
  • 04Works with Playwright, Chrome DevTools MCP and Vercel agent-browser.
  • 05Provides a CLI with JSON output for scripting.
  • 06Includes a collector mode that outputs JSON and CSV.

Use cases

  • Building a client for a site that has no public API.
  • Pulling listings or records from a web page into a script.
  • Letting a coding agent such as Claude Code generate API clients from a browsing session.
  • Collecting structured data from web pages into JSON or CSV files.

Quick start

  1. 1

    Install the tool with uv

    uv tool install reverse-api-engineer
  2. 2

    Install the skill for your coding agent

    npx skills add kalil0321/reverse-api-engineer
  3. 3

    Start the CLI, then give it a goal such as fetching jobs from a careers page

    reverse-api-engineer

Things to know

  • Requires an API key for agent mode.
  • Intel macOS and 32-bit Windows are no longer supported.
  • Sites with aggressive bot detection may block capture or need manual interaction.
  • Generated code runs locally, so it must be reviewed before execution.

In collections

Open-source AI agent frameworks & apps

Topics

#web-scraping#reverse-engineering#api-client#playwright#browser-automation#llm-agents#code-generation#har#ai#ai-agents

FAQ

What is reverse-api-engineer?
Captures a website's network traffic while you or an AI agent browse, then generates a typed API client for the endpoints it uses. Reverse API Engineer turns a website into an API. You give it a site and a goal, such as fetching all job listings from a careers page. A browser visits the site, either driven manually or by an AI agent, and the network traffic is recorded to a HAR file. A configured model then reads that traffic and writes a working client for the endpoints the site actually calls, instead of copying requests out of DevTools by hand.
Is reverse-api-engineer free to use? What license does it have?
reverse-api-engineer is open source under the MIT license. Check the license terms before using it in commercial products.
Is reverse-api-engineer still maintained?
Actively maintained. The last commit to reverse-api-engineer was on Nov 3, 2026.
What can I use reverse-api-engineer for?
Building a client for a site that has no public API. Pulling listings or records from a web page into a script. Letting a coding agent such as Claude Code generate API clients from a browsing session. Collecting structured data from web pages into JSON or CSV files.
How do I install reverse-api-engineer?
Install the tool with uv: uv tool install reverse-api-engineer Install the skill for your coding agent: npx skills add kalil0321/reverse-api-engineer Start the CLI, then give it a goal such as fetching jobs from a careers page: reverse-api-engineer
Where can I get reverse-api-engineer?
The source code and installation instructions are on GitHub: https://github.com/kalil0321/reverse-api-engineer

Summary generated by AI from the project's README. GitHub stats refresh daily.

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