Monkeylearn.com is an awesome tool to help noncoders perform machine learning algorithms. The challenge is that the regular Monkeylearn integration in Zapier does not give you all the API data that you may want. For example, the Extract tool only gives the extracted keywords, but not the relevance, nor the position in text.
So, if instead of using the Monkeylearn zap in Zapier you build your own custom POST request, then you can get all the regular API output in JSON format. Make sure to choose "Custom Request" in the Webhooks by Zapier zap, NOT "POST". Once you are in the "Custom Request" zap, then choose POST as your method.
The image explains all the steps: