The "Protocol" dropdown in request body of all three API steps has been replaced with a "Format" dropdown.
In addition to JSON and GraphQL, Parabola now supports plain text, form-data, and x-www-form-urlencoded formatting types.
When using these options, if an API step does not already have a "Content-Type" header included, we will also now automatically add the right one, according to the last selection in the "Format" field.
This is available on all API steps - Pull from AP, Enrich with API, and Send to API
Utilize merge tags, columns referenced by name and wrapped in {curly braces}, within the value field of a custom header to merge in values for each API call from the input data.
Available in the Enrich with API and Send to API steps.
Source: https://parabola.io/updates/send-more-types-of-api-requests