Theneo is an AI-powered API documentation tool that simplifies the process of creating and maintaining API documentation. It allows users to generate Stripe-like API docs effortlessly, supporting formats like OpenAPI, Postman, and GraphQL. Theneo eliminates manual work by using an AI assistant to generate descriptions and summaries for APIs, and it offers collaboration and editing features similar to Notion. Users can customize the appearance of their API docs to match their brand, and Theneo also provides an API Explorer tool for testing endpoints and gathering user feedback. With Theneo, developers can automate the updating of documentation with code changes using various integrations with platforms like Github, Gitlab, and Bitbucket. The tool aims to increase API adoption and usage by providing comprehensive and well-presented documentation.