~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json~/.config/Claude/claude_desktop_config.json{
"mcpServers": {
"mailchimp": {
"command": "bunx",
"args": [
"@cyanheads/mailchimp-mcp-server@latest"
],
"env": {
"MCP_TRANSPORT_TYPE": "stdio",
"MCP_LOG_LEVEL": "info",
"MAILCHIMP_API_KEY": "your-key-with-dc-suffix-e.g.-us22"
}
}
}
}