---
lang: en
title: 'API docs'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.index.html
---

## API Docs
- [@loopback/extension-health](extension-health.md)
- [@loopback/authentication](authentication.md)
- [@loopback/authorization](authorization.md)
- [@loopback/boot](boot.md)
- [@loopback/booter-lb3app](booter-lb3app.md)
- [@loopback/context](context.md)
- [@loopback/core](core.md)
- [@loopback/http-caching-proxy](http-caching-proxy.md)
- [@loopback/http-server](http-server.md)
- [@loopback/metadata](metadata.md)
- [@loopback/openapi-spec-builder](openapi-spec-builder.md)
- [@loopback/openapi-v3](openapi-v3.md)
- [@loopback/repository](repository.md)
- [@loopback/repository-json-schema](repository-json-schema.md)
- [@loopback/repository-tests](repository-tests.md)
- [@loopback/rest](rest.md)
- [@loopback/rest-explorer](rest-explorer.md)
- [@loopback/service-proxy](service-proxy.md)
- [@loopback/testlab](testlab.md)
- [@loopback/tsdocs](tsdocs.md)

