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# Type of request: This is a ...

[x ] bug report
[ ] feature request

# Detailed description

Not able to use the edge service to write metric data to cloudwatch via the javascript aws-sdk.

However, It **DOES** work when using the deprecated cloudwatch port.

## Expected behavior

Metric data to be visible when calling `awslocal cloudwatch list-metrics`

## Actual behavior

404 from edge service. No metric data is persisted, localstack instance logs the following info:

```
INFO:localstack.services.edge: Unable to determine forwarding port for API "monitoring" - please make sure this API is enabled via the SERVICES configuration
```

# Steps to reproduce

Run JS code in "Client code" section.
See 404 Error

## Command used to start LocalStack

`TMPDIR=/tmp/localstack docker-compose up`

## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

```js
const AWS = require('aws-sdk')
const cw = new AWS.CloudWatch({
  endpoint: 'http://localhost:4566',
})

const data = {
  Namespace: 'ns',
  MetricData: [
    {
      MetricName: 'metric-name',
      Timestamp: new Date(),
      Value: 12345,
      Unit: 'Milliseconds',
      Dimensions: [
        { Name: 'Environment', Value: 'local' },
      ]
    }
  ]
}

cw.putMetricData(data, (err, data) => {
  if (err) {
      console.log('Error', err)
  } else {
      console.log('Success', JSON.stringify(data))
  }
})
```

]
}
"""
THIS_FOLDER = os.path.dirname(os.path.realpath(__file__))
TEST_LAMBDA_ECHO_FILE = os.path.join(THIS_FOLDER, 'lambdas', 'lambda_echo.py')
TEST_MESSAGE_ATTRIBUTES = {
    'City': {
        'DataType': 'String',
        'StringValue': 'Any City'
    },
    'Population': {
        'DataType': 'Number',
        'StringValue': '1250800'
    }
}
class SQSTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.client = aws_stack.connect_to_service('sqs')
    def test_list_queue_tags(self):
        
        
        queue_info = self.client.create_queue(QueueName=TEST_QUEUE_NAME)
        queue_url = queue_info['QueueUrl']
        result = self.client.list_queue_tags(QueueUrl=queue_url)
        
        self.assertNotIn('Tags', result)
        
        self.client.delete_queue(QueueUrl=queue_url)
    def test_publish_get_delete_message(self):