# @loopback/rest > Expose controllers as REST endpoints and route REST API requests to controller methods Latest version **15.0.16** (published 2026-08-18) · MIT license · 0 weekly downloads ## Install ```sh npm install @loopback/rest pnpm add @loopback/rest yarn add @loopback/rest bun add @loopback/rest ``` ## Health **Score 65/100 (B)** — status: active. Positive: has types; no vulnerabilities; recently updated; high maintenance score; high quality score. Warnings: low downloads; no esm support. ## Facts | | | |---|---| | Version | 15.0.16 | | Published | 2026-08-18 | | First published | 2017-09-29 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | bundled | | Module format | CommonJS | | Node | 20 \|\| 22 \|\| 24 | | Dependencies | 31 | | Unpacked size | 603.2 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 5106 | | Author | IBM Corp. and LoopBack contributors | | Maintainers | rfeng, rmg, dhmlau, theprez, frbuceta, marioestradarosa, achrinza | ## Links - npm: https://www.npmjs.com/package/@loopback/rest - Repository: https://github.com/loopbackio/loopback-next - Homepage: https://github.com/loopbackio/loopback-next#readme - Issues: https://github.com/loopbackio/loopback-next/issues - npm.io page: https://npm.io/package/@loopback/rest ## Dependencies (31) - [qs](https://npm.io/package/qs.md) ^6.15.3 - [ajv](https://npm.io/package/ajv.md) ^8.20.0 - [cors](https://npm.io/package/cors.md) ^2.8.6 - [debug](https://npm.io/package/debug.md) ^4.4.3 - [tslib](https://npm.io/package/tslib.md) ^2.8.1 - [lodash](https://npm.io/package/lodash.md) ^4.18.1 - [express](https://npm.io/package/express.md) ^4.22.2 - [js-yaml](https://npm.io/package/js-yaml.md) ^4.3.1 - [type-is](https://npm.io/package/type-is.md) ^2.1.0 - [validator](https://npm.io/package/validator.md) ^13.15.35 - [ajv-errors](https://npm.io/package/ajv-errors.md) ^3.0.0 - [@types/cors](https://npm.io/package/@types/cors.md) ^2.8.19 - [ajv-formats](https://npm.io/package/ajv-formats.md) ^3.0.1 - [body-parser](https://npm.io/package/body-parser.md) ^2.3.0 - [http-errors](https://npm.io/package/http-errors.md) ^2.0.1 - [on-finished](https://npm.io/package/on-finished.md) ^2.4.1 - [ajv-keywords](https://npm.io/package/ajv-keywords.md) ^5.1.0 - [@types/express](https://npm.io/package/@types/express.md) ^4.17.25 - [@types/type-is](https://npm.io/package/@types/type-is.md) ^1.6.7 - [path-to-regexp](https://npm.io/package/path-to-regexp.md) ^6.3.0 - [@loopback/express](https://npm.io/package/@loopback/express.md) ^8.0.15 - [@types/body-parser](https://npm.io/package/@types/body-parser.md) ^1.19.6 - [@types/http-errors](https://npm.io/package/@types/http-errors.md) ^2.0.5 - [@types/on-finished](https://npm.io/package/@types/on-finished.md) ^2.3.5 - [@types/serve-static](https://npm.io/package/@types/serve-static.md) 2.2.0 - [json-schema-compare](https://npm.io/package/json-schema-compare.md) ^0.2.2 - [@loopback/openapi-v3](https://npm.io/package/@loopback/openapi-v3.md) ^11.0.16 - [strong-error-handler](https://npm.io/package/strong-error-handler.md) ^6.0.1 - [@loopback/http-server](https://npm.io/package/@loopback/http-server.md) ^7.0.15 - [@types/express-serve-static-core](https://npm.io/package/@types/express-serve-static-core.md) ^4.19.9 - [@openapi-contrib/openapi-schema-to-json-schema](https://npm.io/package/@openapi-contrib/openapi-schema-to-json-schema.md) ^5.1.0 ## Recent versions - 15.0.16 (latest) — 2026-08-18 - 0.19.0 (dp3) — 2018-07-20 - 0.7.0 (dp2) — 2018-04-16 - 4.0.0-alpha.10 (dp1) — 2017-11-29 - 15.0.15 — 2026-07-16 - 15.0.14 — 2026-06-11 - 15.0.13 — 2026-05-12 - 15.0.12 — 2026-04-14 - 15.0.11 — 2026-03-11 - 15.0.10 — 2026-02-10 - 15.0.9 — 2026-01-12 - 15.0.8 — 2025-12-09 - 15.0.7 — 2025-11-11 - 15.0.6 — 2025-10-15 - 15.0.5 — 2025-09-10 - … 216 more at https://npm.io/package/@loopback/rest/versions ## README # @loopback/rest The REST API package for [loopback-next](https://github.com/loopbackio/loopback-next). ## Overview This component provides a REST server for your application instances, complete with: - new custom routing engine (special thanks to @bajtos)! - tools for defining your application routes - OpenAPI 3.0 spec (`openapi.json`/`openapi.yaml`) generation using `@loopback/openapi-v3` - a default sequence implementation to manage the request and response lifecycle **NOTE: Starting from 6.0.0, we have introduced a middleware-based sequence, which is used as the default one for newly generated LoopBack applications using `lb4` command from `@loopback/cli`.** ## Installation To use this package, you'll need to install `@loopback/rest`. ```sh npm i @loopback/rest ``` ## Basic Use Here's a basic "Hello World" application using `@loopback/rest`: ```ts import {RestApplication, RestServer} from '@loopback/rest'; const app = new RestApplication(); app.handler(({request, response}, sequence) => { sequence.send(response, 'hello world'); }); (async function start() { await app.start(); const server = await app.getServer(RestServer); const port = await server.get('rest.port'); console.log(`Server is running at http://127.0.0.1:${port}`); })(); ``` ## Configuration See https://loopback.io/doc/en/lb4/Server.html#configuration. ## Contributions - [Guidelines](https://github.com/loopbackio/loopback-next/blob/master/docs/CONTRIBUTING.md) - [Join the team](https://github.com/loopbackio/loopback-next/issues/110) ## Tests Run `npm test` from the root folder. ## Contributors See [all contributors](https://github.com/loopbackio/loopback-next/graphs/contributors). ## License MIT --- _Source: https://npm.io/package/@loopback/rest · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._