pm2oa

A lightweight CLI tool to convert Postman collections to OpenAPI specifications using postman2openapi.

Published on npm: https://www.npmjs.com/package/pm2oa

This package targets Node.js 18+ because it relies on the built-in fetch API (no polyfill included). Ensure fetch is available when running in custom environments.

Installation

npx pm2oa

Usage

Convert from URL

npx pm2oa https://some.postman.spec/

Convert from URL to specific output file

npx pm2oa https://some.postman.spec/ -o output.yml

Convert from local JSON file

npx pm2oa postman-spec.json

Force YAML output regardless of extension

npx pm2oa postman-spec.json --format yaml

Convert from stdin

cat postman-spec.json | npx pm2oa

or

npx pm2oa < postman-spec.json

Output Formats

• JSON (default): Outputs OpenAPI specification as JSON
• YAML: Use --format yaml or an output path ending with .yml or .yaml

Options

• [input] - Input file path or URL to Postman collection (optional; errors when stdin is empty)
• -o, --output <file> - Output file path (defaults to stdout)
• -f, --format <format> - Output format (json or yaml)
• -h, --help - Display help information
• -V, --version - Display version number

Development

• npm run lint – Syntax check index.js
• npm test – Smoke test JSON and YAML outputs against a fixture

Publishing

• Releases run the .github/workflows/publish.yml workflow (triggered on release publish and manually via workflow_dispatch).
• The workflow executes npm ci, then npm run lint / npm test, and finally npm publish --access public --provenance with the NPM_TOKEN repository secret supplied as NODE_AUTH_TOKEN.
• Keep versions bumped before invoking the workflow and verify tests/lint pass locally (npm run lint, npm test, optionally npm pack) so the pipeline can succeed without intervention.