Monster Stat Block
GET http://www.dnd5eapi.co/api/monsters/{{monster_name}}/
Update the variable with a monster name to get back the stats for that monster. (UPDATE: It appears there is no longer a numerical ID associated with each record.)
Run in Qodex, click Send
and the Body > Visualizer tab to view the response as a stat block, just like in the D&D Monster Manual.