Based on the knowledge sources, the Mixpanel MCP Server does not use Service Account authentication. Instead, it uses OAuth (specifically the Authorization Code flow with PKCE).
When connecting to the MCP server:
Users authenticate with their own Mixpanel credentials via an OAuth flow. [MCP Permissions]
For built-in integrations (Claude, ChatGPT, Cursor, etc.), you complete a Mixpanel OAuth flow during setup. [MCP Connecting]
For custom integrations, Mixpanel's MCP server supports Authorization Code + PKCE (S256) with standard OAuth endpoints. [MCP OAuth]
Service Accounts are used for authenticating against other Mixpanel APIs (e.g., Ingestion API, Query API, Export API), but the MCP Server specifically relies on OAuth-based user authentication, not Service Accounts.
