JSON

{
  "mcpServers": {
    "gessa": {
      "command": "npx",
      "args": ["-y", "@gessa/mcp-server"],
      "env": {
        "GESSA_API_KEY": "mcpkey_xxx",
        "GESSA_API_URL": "https://api.gessa.ai"
      }
    }
  }
}

Verification: Restart Claude Desktop and confirm Gessa appears in the tools menu.

Common failures are a missing GESSA_API_KEY, an API URL without https://, or a revoked key.