Connect from any application

When connecting to Neon from an application or client, you will need to connect to a database in your Neon project. In Neon, a database belongs to a branch, which may the root branch of your project (main) or a child branch. The root branch in a Neon project has a default database named neondb.

To connect to a database, you must connect to the branch where the database resides, and you must do so by connecting through an endpoint, which is the compute instance associated with the branch.

Project
    |----root branch (main) ---- endpoint (compute) <--- application/client
             |    |
             |    |---- database (neondb)
             |
             ---- child branch ---- endpoint (compute) <--- application/client
                            |
                            |---- database (mydb)

You can obtain the connection details that you require from the Connection Details widget on the Neon Dashboard. Select a branch, a user, and the database you want to connect to. A connection string is constructed for you.

Connection details widget

A Neon connection string includes the user, the endpoint hostname, and the database name.

postgres://casey@ep-square-sea-260584.us-east-2.aws.neon.tech/neondb
             ^                       ^                          ^
             |- <user>               |- <endpoint_hostname>     |- <database>

note

When an application or client requires a PostgreSQL host, it is the endpoint hostname that you should provide. An endpoint hostname, such as the one shown above, is comprised of an endpoint_id (ep-square-sea-260584), a region slug (us-east-2), the cloud platform (aws), and the Neon domain (neon.tech).

You can use the details from the connection string or the connection string itself to configure a connection. For example, you might place the connection details in an .env file, assign the connection string to a variable, or pass the connection string on the command-line, as shown:

.env file:

PGHOST='ep-square-sea-260584.us-east-2.aws.neon.tech'
PGDATABASE='neondb'
PGUSER='casey'
PGPASSWORD='<password>'
PGPORT='5432'

Variable:

DATABASE_URL="postgres://casey:<password>@ep-square-sea-260584.us-east-2.aws.neon.tech:5432/neondb"

Command-line:

psql postgres://casey:<password>@ep-square-sea-260584.us-east-2.aws.neon.tech/neondb

note

For information about connecting with psql, see Connect with psql. Please be aware that some older client libraries and drivers, including older psql executables, are built without SNI support and require a workaround. For more information, see Connecting from older clients.

Some Java-based tools that use the pgJDBC driver for connecting to PostgreSQL, such as DBeaver, DataGrip, and CLion, do not support inclusion of a user name and password in a database connection string. When you find that a full connection string is not accepted, try entering the user name and password values in the appropriate fields in the tool's UI when configuring a connection to Neon.

Certain applications and clients such as Prisma Client or Prisma Migrate may require adjusting your connection string or your Neon connection pooling configuration. For more information, see Connection pooling.

Where do I obtain a password?

A password was provided to you when you created your Neon project. If you have misplaced your password, refer to Reset a password for password reset instructions.

What port does Neon use?

Neon uses the default PostgreSQL port, 5432.

Connection examples

The Connection Details widget on the Neon Dashboard also provides connection examples for different languages and frameworks, constructed for the branch, database, and user that you select. Click connection examples in the Connection Details widget to view or copy the examples.

Connection details widget

Connection examples for various languages and frameworks are also provided in our Guides documentation.

Need help?

Send a request to support@neon.tech, or join the Neon community forum.