# Reqbook

> Reqbook is the notebook for API workflows. It turns API docs, requests, tests, flows, and coding-agent context into runnable Markdown files that live in your repository.

Reqbook is a local-first, open-source developer tool for executable API documentation, Markdown API specs, API testing in CI, local browser workflows, and AI coding-agent context.

## Canonical product pages

- [Homepage](https://markapidown.net/): Product overview, positioning, demo, install options, and comparison summary.
- [Install Reqbook](https://markapidown.net/install/): Shell installer, npm, crates.io, Homebrew, VS Code, Docker, Windows, and source checkout paths.
- [Reqbook FAQ](https://markapidown.net/faq/): Answers about API workflow notebooks, local-first usage, CI, agents, imports, secrets, and comparisons.
- [Agent API context benchmark](https://markapidown.net/benchmarks/agent-api-context/): Transparent local benchmark for coding-agent API context and rediscovery overhead.

## Comparisons

- [Reqbook vs Postman](https://markapidown.net/compare/postman/): Compare hosted API platform workflows with repo-native API workflow notebooks.
- [Reqbook vs Bruno](https://markapidown.net/compare/bruno/): Compare local API client collections with Markdown API notebooks in Git.
- [Reqbook vs Insomnia](https://markapidown.net/compare/insomnia/): Compare GUI API client workflows with executable API docs and coding-agent context.
- [Reqbook vs Hurl](https://markapidown.net/compare/hurl/): Compare terse HTTP tests with Markdown API testing notebooks.
- [Reqbook vs HTTPie](https://markapidown.net/compare/httpie/): Compare ad-hoc HTTP requests with reusable API workflow notebooks.

## Agent workflow pages

- [API testing for Claude Code](https://markapidown.net/api-testing-for-claude-code/)
- [API testing for Cursor](https://markapidown.net/api-testing-for-cursor/)
- [API testing for Google Antigravity](https://markapidown.net/api-testing-for-antigravity/)
- [Postman alternative for coding agents](https://markapidown.net/postman-alternative-for-coding-agents/)

## Blog guides

- [API testing for coding agents](https://markapidown.net/blog/api-testing-for-coding-agents/)
- [Markdown API testing that runs](https://markapidown.net/blog/markdown-api-testing/)
- [API docs as code](https://markapidown.net/blog/api-docs-as-code/)
- [MCP API testing for AI agents](https://markapidown.net/blog/mcp-api-testing-for-ai-agents/)
- [CI API testing with Markdown specs](https://markapidown.net/blog/ci-api-testing-with-markdown/)
- [Local-first Postman alternative for agents](https://markapidown.net/blog/local-first-postman-alternative-for-agents/)

## External references

- [GitHub repository](https://github.com/ngoclinh93qt/ReqBook)
- [Documentation](https://docs.markapidown.net/)
- [crates.io package](https://crates.io/crates/reqbook)
- [npm package](https://www.npmjs.com/package/reqbook)
- [VS Code Marketplace extension](https://marketplace.visualstudio.com/items?itemName=reqbook.reqbook-vscode)

## Entity notes

The canonical product name is Reqbook. MarkApiDown and ReqBook may appear as legacy or repository names, but the current product entity is Reqbook at markapidown.net.