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MongoDB C++ Driver

On this page

  • Introduction
  • Installation
  • Connect to MongoDB Atlas
  • Connect to a MongoDB Server on Your Local Machine
  • Compatibility

Welcome to the documentation site for the official MongoDB C++ driver. You can add the driver to your application to work with MongoDB using the C++11 or later standard. Download the library, mongocxx, from or set up a runnable project by following our tutorial.

See Installing the mongocxx driver.

To connect to a MongoDB Atlas cluster, use the Atlas connection string for your cluster:

#include <mongocxx/client.hpp>
#include <mongocxx/instance.hpp>
mongocxx::instance inst{}; // This should be done only once.
mongocxx::client conn{
mongocxx::database db = conn["test"];


For information about connecting to Atlas Serverless, see the Serverless Instance Limitations page for the minimum driver version you need.

If you need to run a MongoDB server on your local machine for development purposes instead of using an Atlas cluster, you need to complete the following:

  1. Download the Community or Enterprise version of MongoDB Server.

  2. Install and configure MongoDB Server.

  3. Start the server.


Always secure your MongoDB server from malicious attacks. See our Security Checklist for a list of security recommendations.

After you successfully start your MongoDB server, specify your connection string in your driver connection code.

If your MongoDB Server is running locally, you can use the connection string "mongodb://localhost:<port>" where <port> is the port number you configured your server to listen for incoming connections.

If you need to specify a different hostname or IP address, see our Server Manual entry on Connection Strings.

To test whether you can connect to your server, replace the connection string in the Connect to MongoDB Atlas code example and run it.

The following compatibility table specifies the recommended version(s) of the MongoDB C++ driver for use with a specific version of MongoDB.

The first column lists the driver version(s).

All features are supported.
The Driver version will work with the MongoDB version, but not all new MongoDB features are supported.
No mark
The Driver version is not tested with the MongoDB version.
C++ Driver Version
MongoDB 6.0
MongoDB 5.0
MongoDB 4.4
MongoDB 4.2
MongoDB 4.0
MongoDB 3.6
MongoDB 3.4
MongoDB 3.2
MongoDB 3.0
MongoDB 2.6
MongoDB 2.4

The driver does not support older versions of MongoDB.

The following compatibility table specifies the recommended version(s) of the MongoDB C++ driver for use with a specific version of C++.

The first column lists the driver version(s).

C++ Driver Version

For more information on how to read the compatibility tables, see our guide on MongoDB Compatibility Tables.

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