If you are using yarn or npm, you can add our package as a dependency:

# Using yarn
$ yarn add @sentry/node@5.16.0

# Using npm
$ npm install @sentry/node@5.16.0
import connect from 'connect';
import * as Sentry from '@sentry/node';

// or using CommonJS
// const connect = require('connect');
// const Sentry = require('@sentry/node');

// Must configure Sentry before doing anything else with it
Sentry.init({ dsn: '___PUBLIC_DSN___' });

function mainHandler(req, res) {
  throw new Error('My first Sentry error!');

function onError(err, req, res, next) {
  // The error id is attached to `res.sentry` to be returned
  // and optionally displayed to the user for support.
  res.statusCode = 500;
  res.end(res.sentry + "\n");

  // The request handler be the first item


  // The error handler must be before any other error middleware

  // Optional fallthrough error handler

requestHandler accepts some options that let you decide what data should be included in the event sent to Sentry.

Possible options are:

// keys to be extracted from req
request?: boolean | string[]; // default: true = ['cookies', 'data', 'headers', 'method', 'query_string', 'url']
// server name
serverName?: boolean; // default: true
// generate transaction name
//   path == request.path (eg. "/foo")
//   methodPath == request.method + request.path (eg. "GET|/foo")
//   handler == function name (eg. "fooHandler")
transaction?: boolean | 'path' | 'methodPath' | 'handler'; // default: true = 'methodPath'
// keys to be extracted from req.user
user?: boolean | string[]; // default: true = ['id', 'username', 'email']
// client ip address
ip?: boolean; // default: false
// node version
version?: boolean; // default: true
// timeout for fatal route errors to be delivered
flushTimeout?: number; // default: 2000

For example, if you want to skip the server name and add just user, you would use requestHandler like this:

  serverName: false,
  user: ['email']

By default, errorHandler will capture only errors with a status code of 500 or higher. If you want to change it, provide it with the shouldHandleError callback, which accepts middleware errors as its argument and decides, whether an error should be sent or not, by returning an appropriate boolean value.

  shouldHandleError(error) {
    // Capture all 404 and 500 errors
    if (error.status === 404 || error.status === 500) {
      return true
    return false
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