[Feature Request]: Support application/x-www-form-urlencoded Requests in MCP Gateway UI for OAuth2 / Keycloak Integration #1111
Description
Hi Team,
We are attempting to integrate an OAuth2 token request via the MCP Gateway UI, specifically with a Keycloak-based authentication service at the endpoint:
/auth/realms//protocol/openid-connect/token
This endpoint expects a POST request with the following characteristics:
Content-Type: application/x-www-form-urlencoded
Body:
grant_type=password&username=[email protected]&password=
Currently, the MCP Gateway UI only supports input through JSON Schema (via Schema Builder or raw JSON input). This limitation prevents us from sending properly encoded x-www-form-urlencoded requests.
Problem
All attempts result in the body being improperly encoded as JSON.
Keycloak rejects the request with errors such as:
400 Bad Request: {"error":"invalid_request","error_description":"Missing form parameter: grant_type"}
Feature Request
Add support in the MCP Gateway UI for:
Selecting Content-Type: application/x-www-form-urlencoded
Sending properly encoded form parameters (not JSON-wrapped) in the request body