---
lang: en
title: 'API docs: index'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
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editurl: https://github.com/loopbackio/loopback-next
permalink: /doc/en/lb4/apidocs.index.html
---

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[Home](./index.md)

## API Reference

## Packages

<table><thead><tr><th>

Package


</th><th>

Description


</th></tr></thead>
<tbody><tr><td markdown="1">

[@loopback/apiconnect](./apiconnect.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/authentication](./authentication.md)


</td><td markdown="1">

A LoopBack 4 component for authentication support.


</td></tr>
<tr><td markdown="1">

[@loopback/authentication-jwt](./authentication-jwt.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/authentication-passport](./authentication-passport.md)


</td><td markdown="1">

An adapter to plug in passport based strategies to the authentication system in [@loopback/authentication @3.x](./authentication.md)<!-- -->.


</td></tr>
<tr><td markdown="1">

[@loopback/authorization](./authorization.md)


</td><td markdown="1">

A LoopBack 4 component for authorization support (Role based, Permission based, Vote based)


</td></tr>
<tr><td markdown="1">

[@loopback/booter-lb3app](./booter-lb3app.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/context](./context.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/context-explorer](./context-explorer.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/core](./core.md)


</td><td markdown="1">

The core foundation for LoopBack 4. It can also serve as the platform to build large-scale Node.js applications and frameworks.


</td></tr>
<tr><td markdown="1">

[@loopback/cron](./cron.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/filter](./filter.md)


</td><td markdown="1">

A set of utility typings and filter builders to aid in constructing LoopBack filters using the [builder pattern](https://en.wikipedia.org/wiki/Builder_pattern)<!-- -->.


</td></tr>
<tr><td markdown="1">

[@loopback/graphql](./graphql.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/health](./health.md)


</td><td markdown="1">

A component to report health status using [@cloudnative/health](https://github.com/CloudNativeJS/cloud-health)<!-- -->.


</td></tr>
<tr><td markdown="1">

[@loopback/http-caching-proxy](./http-caching-proxy.md)


</td><td markdown="1">

A caching HTTP proxy for integration tests.


</td></tr>
<tr><td markdown="1">

[@loopback/http-server](./http-server.md)


</td><td markdown="1">

HTTP / HTTPS server endpoints for LoopBack 4 apps.


</td></tr>
<tr><td markdown="1">

[@loopback/logging](./logging.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/metadata](./metadata.md)


</td><td markdown="1">

A package with utilities to help developers implement [TypeScript decorators](https://www.typescriptlang.org/docs/handbook/decorators.html)<!-- -->, define/merge metadata, and inspect metadata.


</td></tr>
<tr><td markdown="1">

[@loopback/metrics](./metrics.md)


</td><td markdown="1">

A component that reports metrics of Node.js, the LoopBack framework, and your application to Prometheus.


</td></tr>
<tr><td markdown="1">

[@loopback/mock-oauth2-provider](./mock-oauth2-provider.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/model-api-builder](./model-api-builder.md)


</td><td markdown="1">

A packge with types and helpers for packages contributing Model API builders.


</td></tr>
<tr><td markdown="1">

[@loopback/openapi-spec-builder](./openapi-spec-builder.md)


</td><td markdown="1">

A package to simplify creating OpenAPI specification documents in your tests using the builder pattern.


</td></tr>
<tr><td markdown="1">

[@loopback/openapi-v3](./openapi-v3.md)


</td><td markdown="1">

Decorators that describe LoopBack artifacts as OpenAPI 3.0.0 metadata and utilities that transfer LoopBack metadata to OpenAPI 3.0.0 specifications.


</td></tr>
<tr><td markdown="1">

[@loopback/pooling](./pooling.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/repository-json-schema](./repository-json-schema.md)


</td><td markdown="1">

Convert a TypeScript class/model to a JSON Schema for users, leveraging LoopBack4's decorators, metadata, and reflection system.


</td></tr>
<tr><td markdown="1">

[@loopback/repository-tests](./repository-tests.md)


</td><td markdown="1">

A test suite verifying functionality of `@loopback/repository` in a connector -independent way.


</td></tr>
<tr><td markdown="1">

[@loopback/rest](./rest.md)


</td><td markdown="1">

The REST API package for loopback-next.


</td></tr>
<tr><td markdown="1">

[@loopback/rest-crud](./rest-crud.md)


</td><td markdown="1">

REST API controller implementing default CRUD semantics.


</td></tr>
<tr><td markdown="1">

[@loopback/rest-explorer](./rest-explorer.md)


</td><td markdown="1">

A LoopBack 4 component for adding a self-hosted REST API Explorer.


</td></tr>
<tr><td markdown="1">

[@loopback/rest-msgpack](./rest-msgpack.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/security](./security.md)


</td><td markdown="1">

Common types/interfaces for LoopBack 4 security including authentication and authorization.


</td></tr>
<tr><td markdown="1">

[@loopback/sequelize](./sequelize.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/socketio](./socketio.md)


</td><td markdown="1">


</td></tr>
<tr><td markdown="1">

[@loopback/testlab](./testlab.md)


</td><td markdown="1">

A collection of test utilities we use to write LoopBack tests.


</td></tr>
<tr><td markdown="1">

[@loopback/tsdocs](./tsdocs.md)


</td><td markdown="1">

The `@loopback/tsdocs` package is an internal module to generate [tsdoc](https://github.com/Microsoft/tsdoc) based API docs for `@loopback/*` packages within [loopback-next](https://github.com/loopbackio/loopback-next) monorepo managed by [Lerna](https://github.com/lerna/lerna)<!-- -->.


</td></tr>
</tbody></table>