Monitor your Node.js apps in Heroku

Heroku is platform as a service (PaaS) providing support for several programming languages. You can use Atatus APM with your Heroku apps. Atatus APM supports PHP, Java, Ruby, Python and Node.js languages.

Follow the below mentioned steps to install Atatus in Heroku Node.js app.

From Heroku dashboard, select the relevant application you have created and choose Atatus from the add-on page. There are two ways to choose the add-on.
- From UI, you can click on the Configure add-ons and then select the subscription plan.
- From Command line
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```
    heroku addons:create atatus:$planlevel
```
Go to Atatus dashboard by clicking on the Atatus add-on and navigate to the Settings » Account Settings » License Keys in Atatus and copy the Atatus APM License key.
From your terminal, go to your Node.js app directory and set the license key and application name in heroku config as follows.

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```
heroku config:set ATATUS_APP_NAME='Node.js App'

heroku config:set ATATUS_LICENSE_KEY='Your APM License Key'
```
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```
# Verify config
heroku config
```
Install the Node.js agent and save it to your package.json.

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```
npm install atatus-nodejs --save
```
Include Atatus to the first line of the main module of your application.

Option 1: CommonJS (require)

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```
var atatus = require('atatus-nodejs');
atatus.start();
```
Option 2: ES Modules (Babel, TypeScript)

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```
import atatus from "atatus-nodejs/start";
// startMonitor is different from "start" function. It is used only when you are using Babel(Typescript) or ES6.
atatus.startMonitor();
```
Run the following commands to commit the changes.

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```
git add .
git commit -m "Add Atatus Agent"
git push heroku main && heroku logs --tail
```
Access your server from your web app or mobile app or curl. You will visualize your application's metrics within minutes.