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# Trigger blocks overview

*Trigger blocks* include the following:

* [**Output**](/flows/reference/blocks/output-module/)
* [**Request**](/flows/reference/blocks/request/)
* [**Response**](/flows/reference/blocks/response/)
* [**Schedule**](/flows/reference/blocks/schedule/)
* [**Start**](/flows/reference/blocks/start/)
* [**MCP**](/flows/reference/blocks/mcp/)

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