OneSignal

The OneSignal MCP server provides a comprehensive interface for managing push notifications, emails, and SMS through the OneSignal REST API. Developed by Weirdbrains, this implementation supports all major OneSignal operations including sending notifications, managing user devices, creating segments, and working with templates. A key feature is its multi-app support, allowing users to configure and switch between multiple OneSignal applications within a single server instance. The server includes robust error handling, detailed logging, and organization-level operations through the OneSignal Organization API Key, making it ideal for developers who need to manage notifications across multiple applications or platforms.