Pocket Casts supports the following URL schemes that you can use with third party apps like Workflow and Launch Center:
Open Pocket Casts
pktc://open
Play the podcast episode that is currently paused in Pocket Casts
pktc://play
Pause the podcast episode that is currently playing in Pocket Casts
pktc://pause
Open Pocket Casts and subscribe to the podcast specified by the feed url. Note: don’t include http:// in front of the URL.
pktc://subscribe/feed_url_without_http_goes_here