API documentation enhances developer experience by providing comprehensive guidelines and examples for utilizing APIs effectively. Well-structured documentation allows developers to quickly understand how to integrate with an API, reducing the time spent on trial and error. This clarity fosters efficient development and minimizes learning curves, leading to a smoother overall experience. Additionally, clear documentation often includes error handling procedures and FAQs, aiding developers in troubleshooting issues. Ultimately, effective API documentation contributes significantly to successful project outcomes and enhances user satisfaction.