Trello MCB Server Returning HTML Responses Instead of JSON Data

[engmsaleh]

Issue Overview
When attempting to access Trello data through the MCB server, all API requests are returning HTML documents instead of the expected JSON responses. This occurs despite successful authorization and connection establishment.

Steps to Reproduce
Established a connection to Trello using TRELLO_INITIATE_CONNECTION
Completed OAuth authorization process via the redirect URL
Verified connection status is "ACTIVE" using TRELLO_CHECK_ACTIVE_CONNECTION
Attempted to retrieve data using various endpoints:
TRELLO_GET_MEMBERS_BOARDS_BY_ID_MEMBER
TRELLO_GET_MEMBERS_BY_ID_MEMBER
TRELLO_GET_BOARDS_BY_ID_BOARD
TRELLO_ADD_BOARDS

Current Behavior
All requests return HTML content instead of JSON. The HTML appears to be the Trello web application's HTML response, suggesting the API calls are not being properly formatted or authenticated.

Expected Behavior
API calls should return structured JSON data containing the requested Trello information.

Technical Details
The connection status shows as "ACTIVE" with ID: "8a7fb13a-7c00-4741-b840-a724f948bed3"
OAuth flow completes successfully
The HTML responses include messaging about "browser being unable to load all of Trello's resources"

Possible Causes
Incorrect API endpoint formatting in the MCB server
Authentication token not properly passed in the requests
CORS or proxy issues with the MCB server
Trello API version compatibility issues
This issue prevents any meaningful interaction with Trello data through the MCB integration.