> ## Documentation Index
> Fetch the complete documentation index at: https://docs.formal.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Smart Routing

> How to use smart routing to connect to multiple resources through a single port

Smart routing is a feature that allows you to connect to multiple resources through a single port, e.g. when a "Technology" listener is configured for the Connector.

This is particularly useful when you want to simplify your connection management and reduce the number of ports you need to open.

#### PostgreSQL

For PostgreSQL, use `<db_name>@<resource-name>` as database name to specify the resource.

Example:

```bash theme={null}
psql -h HOSTNAME_OF_CONNECTOR -p 5432 -d DATABASE_NAME@RESOURCE_NAME -U idp:formal:human:john@joinformal.com
```

#### MySQL

For MySQL, use `<db_name>@<resource-name>` as database name to specify the resource.

Example:

```bash theme={null}
mysql -h HOSTNAME_OF_CONNECTOR -P 3306 -u 'idp:formal:human:john@joinformal.com' -p DATABASE_NAME@RESOURCE_NAME
```

#### MongoDB

For MongoDB, use `formal_resource_name=<resource-name>` as appName name to specify the resource.

Example:

```bash theme={null}
mongosh "mongodb://HOSTNAME_OF_CONNECTOR:27017/?appName=formal_resource_name=RESOURCE_NAME"
```

#### HTTP or S3

For HTTP or S3 use `<resource-name>.<host>:<port>` to specify the resource.

<Warning>
  Make sure your DNS entries are properly configured to handle the subdomain routing, i.e. that `*.<host>` targets your Connector.
</Warning>

Example:

```bash theme={null}
curl https://RESOURCE_NAME.HOSTNAME_OF_CONNECTOR:443/api/endpoint
```

<Note>
  If a single S3 resource is available, `<host>:<port>` can be used instead of `<resource-name>.<host>:<port>` for simplicity.
</Note>