MongoDB Atlas
What is MongoDB Atlas?
MongoDB Atlas is the fully managed cloud database service built by MongoDB. It handles provisioning, patching, backups, monitoring, and scaling automatically — so you can focus on building your application. Atlas runs on AWS, Google Cloud, and Azure, and offers a free tier (M0) with 512MB storage and no credit card required.
Atlas Features Overview
| Feature | Description |
|---|---|
| Atlas Clusters | Managed MongoDB replica sets on AWS, GCP, or Azure |
| Atlas Search | Full-text search powered by Apache Lucene, integrated with MongoDB |
| Atlas Data API | RESTful HTTP API to read/write data without a driver |
| Atlas Triggers | Run serverless functions in response to database events |
| Atlas Charts | Built-in data visualization and dashboards |
| Atlas Device Sync | Sync data between mobile devices and the cloud |
| Atlas Vector Search | Semantic search using vector embeddings for AI applications |
| Backups | Continuous backups with point-in-time restore |
Connection Strings
// Standard connection string (SRV format — recommended)
mongodb+srv://username:password@cluster0.abc123.mongodb.net/myDatabase
// Standard connection string (non-SRV)
mongodb://username:password@cluster0-shard-00-00.abc123.mongodb.net:27017,
cluster0-shard-00-01.abc123.mongodb.net:27017,
cluster0-shard-00-02.abc123.mongodb.net:27017/myDatabase?ssl=true&replicaSet=atlas-xyz&authSource=admin
// Connect with mongosh
mongosh "mongodb+srv://username:password@cluster0.abc123.mongodb.net/myDatabase"
// Connection string with options
mongodb+srv://username:password@cluster0.abc123.mongodb.net/myDatabase?retryWrites=true&w=majority// Install the MongoDB Node.js driver
// npm install mongodb
const { MongoClient, ServerApiVersion } = require("mongodb")
const uri = "mongodb+srv://username:password@cluster0.abc123.mongodb.net/?retryWrites=true&w=majority"
const client = new MongoClient(uri, {
serverApi: {
version: ServerApiVersion.v1,
strict: true,
deprecationErrors: true
}
})
async function run() {
try {
await client.connect()
await client.db("admin").command({ ping: 1 })
console.log("Connected to MongoDB Atlas!")
const db = client.db("myapp")
const users = db.collection("users")
// Insert a document
const result = await users.insertOne({ name: "Alice", email: "alice@example.com" })
console.log("Inserted:", result.insertedId)
// Find documents
const allUsers = await users.find({}).toArray()
console.log("Users:", allUsers)
} finally {
await client.close()
}
}
run().catch(console.dir)// Install PyMongo: pip install pymongo
// Python connection example
from pymongo import MongoClient
from pymongo.server_api import ServerApi
uri = "mongodb+srv://username:password@cluster0.abc123.mongodb.net/?retryWrites=true&w=majority"
client = MongoClient(uri, server_api=ServerApi("1"))
try:
client.admin.command("ping")
print("Connected to MongoDB Atlas!")
db = client["myapp"]
users = db["users"]
# Insert a document
result = users.insert_one({"name": "Alice", "email": "alice@example.com"})
print("Inserted:", result.inserted_id)
# Find documents
for user in users.find({"active": True}):
print(user)
finally:
client.close()