Enterprise-grade API documentation for humans and AI agents
Introducing Fern, by Postman, a new way to centralize API documentation across OpenAPI, AsyncAPI, and Postman Collections. With one home for your APIs and AI-powered search, developers can find answers faster and onboard with confidence. While writers maintain accurate documentation the way they prefer with the flexibility to write in a code editor, a web editor, or with the Fern AI writing agent.
Postman's built-in documentation remains available as a lightweight option for publishing docs directly from collections.
API documentation
Deliver high-quality, always up-to-date documentation without the manual overhead.
Create reliable and easy-to-follow documentation for every API
Spend less time documenting
Auto-generated docs eliminate manual writing and keep docs up to date whenever something changes.
Reduce onboarding time and improve usability
Centralized, clear, and accessible documentation makes it easy for developers to explore and test endpoints directly within docs.
Enforce API quality standards at scale
Built-in governance rules and style guidelines ensure every API is well-documented and easy to consume.
Postman powers the world's APIs
40M+
developers
500K+
organizations
98%
of the Fortune 500
Onboard humans and machines to your APIs quickly
Postman provides all your API consumers, both human and machine, with easy-to-follow, up-to-date documentation right within your collections.
Apply best practices by using built-in documentation templates
Get started with documentation templates that include Markdown-based layouts, folder hierarchy, sample responses, and recommendations for every section of your doc.
Enhance your API documentation with AI
Built-in AI automatically reviews collections and specs, recommending improvements and generating docs that are clearer, more complete, and always in sync.
Axis Bank centralized documentation and cut onboarding time from 10 days to 2
See Postman in action
Watch an in-depth demo to see how Postman helps teams onboard faster and ship higher-quality APIs with native API documentation.
