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Fundamentals

Stable API

On this page

  • Overview
  • Enable the Stable API on a MongoDB Client
  • Stable API Options

Note

The Stable API feature requires MongoDB Server 5.0 or later.

Use the Stable API feature only if all the MongoDB servers you are connecting to support this feature.

Overview

In this guide, you can learn how to specify the Stable API when connecting to a MongoDB instance or replica set. You can use the Stable API feature to force the server to run operations with behavior compatible with the specified API version. An API version defines the expected behavior of the operations it covers and the format of server responses. If you change to a different API version, the operations are not guaranteed to be compatible and the server responses are not guaranteed to be similar.

When you use the Stable API feature with an official MongoDB driver, you can update your driver or server without worrying about backward compatibility issues of the commands covered by the Stable API.

See the MongoDB reference page on the Stable API for more information including a list of commands it covers.

The following sections describe how you can enable the Stable API for your MongoDB client and the options that you can specify.

Enable the Stable API on a MongoDB Client

To enable the Stable API, you must specify an API version in the MongoClientOptions passed to your MongoClient. Once you instantiate a MongoClient instance with a specified API version, all commands you run with that client use that version of the Stable API.

Tip

You must create a new client for each version of the Stable API on
which you want to run a command.

To run commands that are not covered by the Stable API, make sure the "strict" option is disabled. See the section on Stable API Options for more information.

The example below shows how you can instantiate a MongoClient that sets the Stable API version and connects to a server by performing the following operations:

  • Specify a server URI to connect to.

  • Specify a Stable API version in the MongoClientOptions object, using a constant from the ServerApiVersion object.

  • Instantiate a MongoClient, passing the URI and the MongoClientOptions to the constructor.

const { MongoClient, ServerApiVersion } = require("mongodb");
const uri = "mongodb+srv://<user>:<password>@<cluster-url>?retryWrites=true&w=majority";
const client = new MongoClient(uri, { serverApi: ServerApiVersion.v1 });

Warning

If you specify an API version and connect to a MongoDB server that does not support the Stable API, your application may throw an error when connecting to your MongoDB server with the following text:

MongoParseError: Invalid server API version=...

For more information on the methods and classes referenced in this section, see the following API Documentation:

Stable API Options

You can enable or disable optional behavior related to the Stable API as described in the following table.

Option Name
Description
version
Required. Specifies the version of the Stable API.

Default: null
strict
Optional. When set, if you call a command that is not part of the declared API version, the driver raises an exception.

Default: false
deprecationErrors
Optional. When set, if you call a command that is deprecated in the declared API version, the driver raises an exception.

Default: false

The following example shows how you can set the options of the ServerApi interface.

const { MongoClient, ServerApiVersion } = require("mongodb");
const uri = "mongodb+srv://<user>:<password>@<cluster-url>?retryWrites=true&w=majority";
const client = new MongoClient(uri,
    {
        serverApi: {
            version: ServerApiVersion.v1,
            strict: true,
            deprecationErrors: true,
        }
    });

For more information on the options in this section, see the following API Documentation:

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