Node.js SDK

The Sentry Node.js SDK provides comprehensive error monitoring and performance tracking for Node.js applications using OpenTelemetry instrumentation.

Installation

npm install @sentry/node

Basic Setup

Create an instrumentation file and import it before any other code:

// instrument.js
import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  
  // Performance Monitoring
  tracesSampleRate: 1.0,
  
  // Profiling
  profilesSampleRate: 1.0,
});

Import the instrumentation file first in your application:

// app.js
import './instrument.js';
import express from 'express';

const app = express();

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(3000);

Or use Node.js --import flag:

node --import ./instrument.js app.js

Express Integration

Automatic instrumentation for Express.js:

import * as Sentry from '@sentry/node';
import express from 'express';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.expressIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const app = express();

// Add Sentry error handler - must be before other error handlers
app.use(Sentry.expressErrorHandler());

// Other error handlers
app.use((err, req, res, next) => {
  res.status(500).send('Internal Server Error');
});

app.listen(3000);

Framework Integrations

Fastify
Koa
Hapi
Connect

import * as Sentry from '@sentry/node';
import Fastify from 'fastify';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.fastifyIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const fastify = Fastify();

// Add error handler
fastify.setErrorHandler(Sentry.setupFastifyErrorHandler(fastify));

fastify.listen({ port: 3000 });

import * as Sentry from '@sentry/node';
import Koa from 'koa';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.koaIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const app = new Koa();

// Add error handler middleware
app.use(Sentry.setupKoaErrorHandler(app));

app.listen(3000);

import * as Sentry from '@sentry/node';
import Hapi from '@hapi/hapi';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.hapiIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const server = Hapi.server({ port: 3000 });

// Add error handler
await server.register({
  plugin: Sentry.setupHapiErrorHandler(server),
});

await server.start();

import * as Sentry from '@sentry/node';
import connect from 'connect';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.connectIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const app = connect();

// Add error handler
app.use(Sentry.setupConnectErrorHandler());

app.listen(3000);

Database Integrations

import * as Sentry from '@sentry/node';
import { PrismaClient } from '@prisma/client';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.prismaIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const prisma = new PrismaClient();

// Database queries are automatically tracked
const users = await prisma.user.findMany();

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.mongoIntegration(),
  ],
  tracesSampleRate: 1.0,
});

// MongoDB operations are automatically tracked

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.mongooseIntegration(),
  ],
  tracesSampleRate: 1.0,
});

// Mongoose operations are automatically tracked

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.postgresIntegration(),    // pg library
    Sentry.postgresJsIntegration(),  // postgres.js library
  ],
  tracesSampleRate: 1.0,
});

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.mysqlIntegration(),   // mysql library
    Sentry.mysql2Integration(),  // mysql2 library
  ],
  tracesSampleRate: 1.0,
});

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.redisIntegration(),
  ],
  tracesSampleRate: 1.0,
});

AI SDK Integrations

OpenAI
Anthropic
Google GenAI
LangChain
LangGraph

import * as Sentry from '@sentry/node';
import OpenAI from 'openai';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.openAIIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const client = new OpenAI();

// Automatically tracked
const completion = await client.chat.completions.create({
  model: 'gpt-4',
  messages: [{ role: 'user', content: 'Hello!' }],
});

import * as Sentry from '@sentry/node';
import Anthropic from '@anthropic-ai/sdk';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.anthropicAIIntegration(),
  ],
  tracesSampleRate: 1.0,
});

const client = new Anthropic();

// Automatically tracked
const message = await client.messages.create({
  model: 'claude-3-opus-20240229',
  messages: [{ role: 'user', content: 'Hello!' }],
});

import * as Sentry from '@sentry/node';
import { GoogleGenAI } from '@google/generative-ai';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.googleGenAIIntegration(),
  ],
  tracesSampleRate: 1.0,
});

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.langChainIntegration(),
  ],
  tracesSampleRate: 1.0,
});

// Use callback handler
const handler = Sentry.createLangChainCallbackHandler();

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.langGraphIntegration(),
  ],
  tracesSampleRate: 1.0,
});

// Instrument your graph
Sentry.instrumentLangGraph(graph);

Performance Monitoring

Automatic Instrumentation

The SDK automatically instruments:

HTTP/HTTPS requests
Express/Fastify/Koa routes
Database queries
File system operations
Child processes

Custom Spans

import * as Sentry from '@sentry/node';

async function processData() {
  return await Sentry.startSpan(
    {
      name: 'process-data',
      op: 'function',
    },
    async () => {
      // Your code here
      const result = await heavyOperation();
      return result;
    },
  );
}

Nested Spans

import * as Sentry from '@sentry/node';

await Sentry.startSpan(
  { name: 'parent-operation', op: 'task' },
  async () => {
    await Sentry.startSpan(
      { name: 'child-operation-1', op: 'db.query' },
      async () => {
        await db.query('SELECT * FROM users');
      },
    );
    
    await Sentry.startSpan(
      { name: 'child-operation-2', op: 'http.client' },
      async () => {
        await fetch('https://api.example.com/data');
      },
    );
  },
);

Error Handling

Automatic Capture

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.onUncaughtExceptionIntegration(),
    Sentry.onUnhandledRejectionIntegration(),
  ],
});

// Uncaught exceptions are automatically captured
throw new Error('This will be captured');

Manual Capture

import * as Sentry from '@sentry/node';

try {
  riskyOperation();
} catch (error) {
  Sentry.captureException(error, {
    tags: {
      section: 'data-processing',
    },
    extra: {
      operation: 'user-import',
    },
  });
}

Context & Scope

User Context

import * as Sentry from '@sentry/node';

app.use((req, res, next) => {
  if (req.user) {
    Sentry.setUser({
      id: req.user.id,
      email: req.user.email,
      username: req.user.username,
    });
  }
  next();
});

Request Isolation

import * as Sentry from '@sentry/node';

app.get('/user/:id', async (req, res) => {
  // Use isolation scope for request-specific context
  Sentry.withIsolationScope((scope) => {
    scope.setTag('user_id', req.params.id);
    scope.setContext('request', {
      method: req.method,
      url: req.url,
    });
    
    // Process request
  });
});

Profiling

Enable CPU profiling:

import * as Sentry from '@sentry/node';
import { profiler } from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  
  integrations: [
    profiler(),
  ],
  
  tracesSampleRate: 1.0,
  profilesSampleRate: 1.0,
});

Cron Monitoring

Monitor scheduled jobs:

import * as Sentry from '@sentry/node';

// Wrap your cron job
await Sentry.withMonitor(
  'my-cron-job',
  async () => {
    // Your cron job logic
    await performScheduledTask();
  },
  {
    schedule: {
      type: 'crontab',
      value: '0 * * * *', // Every hour
    },
    checkinMargin: 5, // minutes
    maxRuntime: 30, // minutes
    timezone: 'America/New_York',
  },
);

Local Variables

Capture local variables in stack traces:

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.localVariablesIntegration(),
  ],
});

Context Lines

Capture source code context:

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  integrations: [
    Sentry.contextLinesIntegration(),
  ],
});

Best Practices

Import First

Always import the instrumentation file before any other code.

Use Integrations

Enable framework-specific integrations for automatic instrumentation.

Request Isolation

Use isolation scopes to separate context between requests.

Sampling

Adjust sample rates in production to control costs.

Configuration

Complete Configuration

import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: 'YOUR_DSN_HERE',
  
  // Environment
  environment: 'production',
  release: 'my-app@1.0.0',
  serverName: process.env.HOSTNAME,
  
  // Performance
  tracesSampleRate: 0.2,
  profilesSampleRate: 0.2,
  
  // Integrations
  integrations: [
    Sentry.httpIntegration(),
    Sentry.expressIntegration(),
    Sentry.prismaIntegration(),
    Sentry.contextLinesIntegration(),
    Sentry.localVariablesIntegration(),
  ],
  
  // Error filtering
  ignoreErrors: [
    'ECONNRESET',
    'EPIPE',
  ],
  
  beforeSend(event, hint) {
    // Filter or modify events
    if (event.exception) {
      console.log('Error captured:', hint.originalException);
    }
    return event;
  },
});

Next Steps

Express

Express.js integration guide

Prisma

Prisma integration guide

OpenTelemetry

OpenTelemetry setup

Profiling

CPU profiling guide

Browser & Frontend

Server & Backend

Full-Stack Frameworks

Serverless & Edge

Installation

Basic Setup

Express Integration

Framework Integrations

Database Integrations

AI SDK Integrations

Performance Monitoring

Automatic Instrumentation

Custom Spans

Nested Spans

Error Handling

Automatic Capture

Manual Capture

Context & Scope

User Context

Request Isolation

Profiling

Cron Monitoring

Local Variables

Context Lines

Best Practices

Import First

Use Integrations

Request Isolation

Sampling

Configuration

Next Steps

Express

Prisma

OpenTelemetry

Profiling

Browser & Frontend

Server & Backend

Full-Stack Frameworks

Serverless & Edge

​Installation

​Basic Setup

​Express Integration

​Framework Integrations

​Database Integrations

​AI SDK Integrations

​Performance Monitoring

​Automatic Instrumentation

​Custom Spans

​Nested Spans

​Error Handling

​Automatic Capture

​Manual Capture

​Context & Scope

​User Context

​Request Isolation

​Profiling

​Cron Monitoring

​Local Variables

​Context Lines

​Best Practices

Import First

Use Integrations

Request Isolation

Sampling

​Configuration

​Next Steps

Express

Prisma

OpenTelemetry

Profiling

Installation

Basic Setup

Express Integration

Framework Integrations

Database Integrations

AI SDK Integrations

Performance Monitoring

Automatic Instrumentation

Custom Spans

Nested Spans

Error Handling

Automatic Capture

Manual Capture

Context & Scope

User Context

Request Isolation

Profiling

Cron Monitoring

Local Variables

Context Lines

Best Practices

Configuration

Next Steps