McpAuthorizationError message means Zapier could not verify the sign-in for your AI client. This usually means an app connection on your server has expired and needs to be reauthenticated.
Symptom
Your AI client shows the errorMcpAuthorizationError when trying to connect to Zapier MCP.
Causes
- An app connection on the server has expired or been revoked.
- The connection token saved in your AI client is out of date.
How to fix it
First, try reconnecting the app that is failing:1
Open your server
In the left sidebar of the Zapier MCP dashboard, select your server.
2
Select the app menu
Select the menu icon beside the name of the app.
3
Reauthenticate
Select Update authentication and follow the prompts to reconnect.
4
Test again
Try the action in your AI client again.
1
Open your server
Go to the Zapier MCP dashboard and select your server.
2
Go to the Connect tab
In the top menu bar, select the Connect tab.
3
Rotate your token
Select Rotate token to generate a new connection token.
4
Update your client
Copy the new server URL and update it in your AI client’s configuration.
5
Restart and test
Restart your AI client and try connecting again.
If you are using the TypeScript or Python SDK with an API key, this error can occur if the key is revoked. Generate a new API key from the Zapier MCP dashboard and update it in your SDK configuration.
Still need help?
- Ask in the Zapier Community for advice from experienced Zapier users.
- Contact the Zapier MCP team for feedback or help.