> For the complete documentation index, see [llms.txt](https://help.1msg.io/platform-1msg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.1msg.io/platform-1msg/use-guide/send-message.md).

# Send Message

- [Customer consent (opt-in)](https://help.1msg.io/platform-1msg/use-guide/send-message/customer-consent-opt-in.md)
- [24-hour conversation window](https://help.1msg.io/platform-1msg/use-guide/send-message/24-hour-conversation-window.md)