Forms for Actions HTTP Request in Flows Forces the Body to Be in JSON Format

Last Updated: Sep 10, 2025

Overview

When trying to create a Flow for a Form using the HTTP Request action and choosing the application/x-www-form-urlencoded content type, the body of the request seems to require a JSON object instead of the format. "key1=value1&key2=value2"

If the body is not in JSON format, the following error is received:

Body is not a valid JSON

Screenshot 2024-05-29 at 2.55.08 PM.png

Applies To

Forms for Actions

Cause

The body of the HTTP request when creating this Flow needs to be in JSON format, regardless of the chosen Content-Type. When making the HTTP request, Auth0 will transform the body into the selected format.

Solution

Format the body of the HTTP request in JSON format.