Postman alternative for coding agents
A local-first API workspace that stores runnable markdown API contracts in Git so developers, CI, and coding agents can use the same source of truth.
A file-based alternative for agent workflows
Postman is a strong GUI-first API client. Reqbook focuses on a narrower problem: API workflows that need to live in Git, run in CI, and remain readable to coding agents. Instead of hiding the contract in a hosted workspace, Reqbook stores it as runnable markdown.
Plain markdown specs
Requests, expected responses, variables, and notes live in api-docs/*.md.
CLI and browser
Use rqb exec in scripts and rqb serve for local debugging.
Agent-readable
Claude Code, Cursor, Copilot, Codex, Antigravity, Windsurf, and OpenCode can inspect and update the same files.
When to choose Reqbook
Use Reqbook as a Postman alternative when the API contract should be operated by both people and agents.
- You want API specs reviewed in pull requests.
- You need API contract testing in CI without exporting collections.
- You want a local API UI without accounts, telemetry, or forced cloud sync.
- You want coding agents to run specs instead of reconstructing requests from source code.
Migration path
Move one endpoint or flow first. Import OpenAPI or curl, validate the generated markdown, and commit it.
$ rqb init --name=my-api --yes $ rqb import openapi ./openapi.yaml $ rqb validate api-docs/ $ rqb serve
See the homepage comparison table, the feature overview, or the guide to markdown API testing that runs.