LoopBack makes it easy to build modern applications that require complex integrations.

Fast, small, powerful, extensible core
Generate real APIs with a single command
Define your data and endpoints with OpenAPI
No maintenance of generated code

Status: General Availability

LoopBack 4 GA (General Availability) has been released in October 2018, read more in the announcement post.

The documentation website is https://loopback.io/doc/en/lb4/.

Learn about the latest and greatest features and technologies in LoopBack 4 by using it for your next project. Start by having a look at Getting Started.

Check the API documentation for all the API usages in each package.

Long Term Support

We don't provide any LTS version for LoopBack 4 yet. Please join the discussion in loopback-next#4398 if you are interested in a version that's less frequently changed.

Version	Status	Published	EOL
LoopBack 4	Current	Oct 2018	Apr 2028 (minimum)
LoopBack 3	End-of-Life	Dec 2016	Dec 2020
LoopBack 2	End-of-Life	Jul 2014	Apr 2019

Please refer to our Long Term Support Policy for more details.

Installation

Make sure you have the following installed:

Package	Version/-s	Link	Note
Node.js	Maintenance LTS (v20) Active LTS (v22) Current (v24)	https://nodejs.org/en/about/releases/	The use of the current version for production is not recommended.

You can generate a project with our generator or with the CLI as follows:

npm create loopback
npx -p @loopback/cli lb app

To create your first LoopBack 4 application, see Getting Started.

Documentation

Contributing

See the following resources to get you started:

You can join the team by posting a comment to issue #110.

Security

If you think you have discovered a new security issue with any LoopBack package, please do not report it on GitHub. Instead, send an email to security@loopback.io with a full description and steps to reproduce.

See SECURITY.md for more details.

Team

Project Architect

Raymond Feng

Technical Steering Committee

Raymond Feng	Diana Lau	Mario Estrada	Rifa Achrinza	Francisco Buceta	Samarpan Bhattacharya

Other Project Maintainers

Nora Abdelgadir	Matthew Schnee	Hage Yaapa

Agnes Lin	Madaky	Hugo Da Roit

Nico Flaig	Denny Bartelt	Douglas McConnachie

Samarpan Bhattacharya	Muhammad Aaqil

See all contributors.

Alumni

License

MIT