> For the complete documentation index, see [llms.txt](https://docs.openalgo.in/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openalgo.in/api-documentation/v1/utilities-api.md).

# Utilities API

Calendar and messaging resources provide market schedules and opt-in alert delivery.

| Endpoint                                                    | Purpose                                 |
| ----------------------------------------------------------- | --------------------------------------- |
| [Holidays](/api-documentation/v1/utilities-api/holidays.md) | Read exchange holidays                  |
| [Timings](/api-documentation/v1/utilities-api/timings.md)   | Read the market schedule for a date     |
| [Telegram](/api-documentation/v1/utilities-api/telegram.md) | Configure and operate Telegram delivery |
| [WhatsApp](/api-documentation/v1/utilities-api/whatsapp.md) | Send a WhatsApp notification            |