Are we able to get USEPylon.com approved for MCP usage? I just tried to authorize it, and it looks like ShipHero is blocking the callback URL.
Hi Eric, I hope you are doing well!
Good news! The Pylon callback URL (https://callback.usepylon.com/mcp/oauth-callback) has since been added to the allowed callback URLs for the ShipHero MCP, so this should no longer be blocked. Please try the authorization flow again from Pylon.
A couple of notes from a recent rollout that may be relevant:
- We also fixed an issue where the MCP OAuth flow wasn’t issuing refresh tokens, which caused connections to drop and require manual re-authentication. This fix is live, so new authorizations will renew silently in the background. If you had connected before and were seeing repeated re-auth prompts, simply re-authenticating once should get you a refresh token going forward.
- If you still get the “callback URL not allowed” error after retrying, please reach out to support with your account ID so we can verify the configuration for your account, callback URL approvals may need to be enabled per account.
Best regards, Luciano.