> For the complete documentation index, see [llms.txt](https://fusionauth.io/docs/llms.txt)

# API | FusionAuth Docs

Explore step-by-step API quickstart guides from FusionAuth to seamlessly integrate authentication into your application.

# API

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[View Markdown](https://fusionauth.io/docs/get-started/quickstarts/api.md)

[.NET API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-dotnet-api.md)[Golang API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-golang-api.md)[Laravel API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-php-laravel-api.md)[Node/Express API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-javascript-express-api.md)[Ruby on Rails API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-ruby-on-rails-api.md)[Spring Boot API](https://fusionauth.io/docs/get-started/quickstarts/api/quickstart-java-springboot-api.md)