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Prerequisites

  • Published on Jul 29, 2026
  • 1 minute(s) read
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Before you can use the Polarity MCP, confirm the following conditions are met:

  • Polarity Server is running and accessible over HTTPS.

  • At least one integration is running on the server.

    • The MCP only returns useful data if integrations are active and subscribed to by the authenticated user.

  • AI is enabled in the server's Model Settings in the UI (see Enabling the MCP Server).

    • Without this, the conversations/chat API and MCP reducers will not function, though the MCP endpoint itself will still route.

  • You have a valid Polarity user account and can obtain a JWT token for API authentication (see Authenticating with the MCP Endpoint).

  • Ensure MCP is enabled in the Server by navigating to the .env file and adding in the line HERMES\_MCP\_SERVER=true

  • Your MCP client supports StreamableHTTP transport.

    • The Polarity MCP does not use STDIOtransport.  Confirm that your client or SDK supports HTTP-based MCP connections.