What does this problem usually mean?
An MCP connection can fail because the server process is not starting, the client configuration points to the wrong command or endpoint, or required environment variables are missing.
What to check first
- 1
Confirm that the MCP server can start independently of the AI client.
- 2
Check the configured command, arguments or endpoint.
- 3
Verify required environment variables without exposing secrets.
- 4
Review client logs for transport or initialization errors.
- 5
Test one simple MCP tool or resource after the connection is restored.
Important: verify the result
Change one thing at a time and repeat the same test afterwards. A successful command is not proof of a fix; verify that the original failure can no longer be reproduced.
Never include full API keys, passwords, seed phrases or private keys in screenshots, logs or support requests.
Note: Provider features, limits and versions can change. For version-specific questions, always verify the current vendor documentation.