# Build Well-Documented and Authenticated APIs in Node.js with Fastify

DevFeed: [Build Well-Documented and Authenticated APIs in Node.js with Fastify](<https://devfeed.tech/articles/build-well-documented-and-authenticated-apis-in-node-js-with-fastify-26379.md>)

Original publisher: [Read original article](<https://www.heroku.com/blog/build-openapi-apis-nodejs-fastify/>)

Author: Julián Duque

Published: 2024-04-29T23:25:00Z

Content type: tutorial

Language: en

Sources: [Heroku](<https://devfeed.tech/sources/heroku.md>)

Topics: [Fastify](<https://devfeed.tech/topics/fastify.md>), [API](<https://devfeed.tech/topics/api.md>), [Node.js](<https://devfeed.tech/topics/node-js.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [JSON Web Tokens](<https://devfeed.tech/topics/jwt.md>), [OpenAPI Specification](<https://devfeed.tech/topics/openapi.md>), [Heroku](<https://devfeed.tech/topics/heroku.md>), [Postman](<https://devfeed.tech/topics/postman.md>), [Swagger](<https://devfeed.tech/topics/swagger.md>), [Back end](<https://devfeed.tech/topics/backend.md>)

Tags: [apis](<https://devfeed.tech/tags/apis.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [back-end](<https://devfeed.tech/tags/back-end.md>), [build](<https://devfeed.tech/tags/build.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [express](<https://devfeed.tech/tags/express.md>), [framework](<https://devfeed.tech/tags/framework.md>), [heroku](<https://devfeed.tech/tags/heroku.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [jwt](<https://devfeed.tech/tags/jwt.md>), [node-js](<https://devfeed.tech/tags/node-js.md>), [openapi](<https://devfeed.tech/tags/openapi.md>), [postman](<https://devfeed.tech/tags/postman.md>), [product-features](<https://devfeed.tech/tags/product-features.md>), [swagger](<https://devfeed.tech/tags/swagger.md>)

## AI overview

A hands-on walkthrough for building a documented and authenticated API with Node.js and Fastify. It covers JWT authentication, Fastify Swagger plugins for generating an OpenAPI specification, Postman as an API client, and deployment to Heroku.

## Source excerpt

If you're an API developer working with Node.js, then you're probably familiar with Express. But have you tried out the Fastify framework to build with power, speed, and convenience? In this walkthrough, we build a full-featured, easy-to-consume API with Fastify. And we deploy it to the cloud with ease. We show you how to: Get [...] The post Build Well-Documented and Authenticated APIs in Node.js with Fastify appeared first on Heroku.