What’s the minimum documentation required for an API?

API documentation plays a critical role in encouraging developer adoption, functioning as both a guide and tutorial. While API reference documentation, often generated from the OpenAPI Specification using tools like Swagger UI, is essential for detailing endpoints, input parameters, and output payloads, more comprehensive documentation is necessary. A well-structured developer portal should include five key sections: an overview of the API type and use cases, authentication methods, workflows for common scenarios, code samples and SDKs, and detailed API references. To create effective documentation, starting with minimal content and expanding over time is advised, with tools like the MVD Template offering practical guidance. Observing successful examples from companies like Stripe, Twilio, GitHub, and SendGrid can provide valuable insights into launching a successful developer portal.