API or node SDK to get content for transactional Emails with message id or delivery ID

Hey suman,

regarding the status of the transactional messages you can check out Get transactional message deliveries or for campaign emails Reporting Webhooks.

I am not sure if you can get the html / body of the delivered email. Do you need the exact words or is a description enough?

In order to see the emails myself I created a Slack notification and simply linked the delivery URL in the message. Not sure if that would fit your needs: https://fly.customer.io/workspaces/123456789/journeys/outbox/deliveries/abcdefgh==

Thanks for your response,
Couple of follow ups, 
Get transactional message deliveries - returns metrics of all messages, is there a way I can filter out metrics by using only message id or delivery id.
Also which key I should refer to if I am interested to know if a message is sent to the recipent or not.
https://docs.customer.io/api/app/#operation/getArchivedMessage - in order to get the content of the email I have got this API are there any another apis similar to this? The problem with this API is its rate limited to only 100 requests per day.