Authentication Issues
Use this section if your client reaches the server but cannot complete sign-in.
Step 1: Verify external client app configuration
If your client requires an external client app, make sure that setup exactly matches the Salesforce Hosted MCP Server requirements.
Step 2: If using Vibes
If you are using Vibes as your MCP client, an external client app is not required. Follow Vibes documentation for setup and troubleshooting.
Step 3: Verify callback/redirect URL
Make sure the callback (redirect) URL in your client exactly matches what is configured in Salesforce.
Step 4: Confirm OAuth support
Your MCP client must support an OAuth flow compatible with Salesforce Hosted MCP Servers.
Step 5: Isolate client-specific problems
Try the same connection/sign-in in Postman or MCP Inspector.
- If it works there, review your MCP client’s authentication setup.
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