> For the complete documentation index, see [llms.txt](https://guide.plumber.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.plumber.gov.sg/user-guides.md).

# User guides

- [Start the workflow](https://guide.plumber.gov.sg/user-guides/start-the-workflow.md): Choose how you want to start you workflows:
- [FormSG](https://guide.plumber.gov.sg/user-guides/start-the-workflow/formsg.md)
- [FormSG (Multi-Respondent Form) integration](https://guide.plumber.gov.sg/user-guides/start-the-workflow/formsg-multi-respondent-form-integration.md)
- [Scheduler](https://guide.plumber.gov.sg/user-guides/start-the-workflow/scheduler.md)
- [Webhook](https://guide.plumber.gov.sg/user-guides/start-the-workflow/webhook.md)
- [Ownself Gather](https://guide.plumber.gov.sg/user-guides/start-the-workflow/ownself-gather.md)
- [Actions](https://guide.plumber.gov.sg/user-guides/actions.md): Choose what action you want to perform when your workflow starts:
- [Email by Postman](https://guide.plumber.gov.sg/user-guides/actions/email-by-postman.md)
- [SMS by Postman](https://guide.plumber.gov.sg/user-guides/actions/sms-by-postman.md)
- [Pair](https://guide.plumber.gov.sg/user-guides/actions/pair.md): Coming soon!
- [LetterSG](https://guide.plumber.gov.sg/user-guides/actions/lettersg.md)
- [Telegram](https://guide.plumber.gov.sg/user-guides/actions/telegram.md)
- [Slack](https://guide.plumber.gov.sg/user-guides/actions/slack.md)
- [Tiles](https://guide.plumber.gov.sg/user-guides/actions/tiles.md)
- [M365 Excel (.gov.sg Agencies only)](https://guide.plumber.gov.sg/user-guides/actions/m365-excel-.gov.sg-agencies-only.md)
- [Formatter](https://guide.plumber.gov.sg/user-guides/actions/formatter.md)
- [Only continue if](https://guide.plumber.gov.sg/user-guides/actions/only-continue-if.md)
- [If-then](https://guide.plumber.gov.sg/user-guides/actions/if-then.md)
- [For each item](https://guide.plumber.gov.sg/user-guides/actions/for-each-item.md)
- [Delay](https://guide.plumber.gov.sg/user-guides/actions/delay.md)
- [PaySG](https://guide.plumber.gov.sg/user-guides/actions/paysg.md)
- [Ownself Gather](https://guide.plumber.gov.sg/user-guides/actions/ownself-gather.md)
- [Custom API](https://guide.plumber.gov.sg/user-guides/actions/custom-api.md)
- [Toolbox](https://guide.plumber.gov.sg/user-guides/actions/toolbox.md): Toolbox contains a selection of useful actions, such as conditional logic, that enables you to control what actions your pipes run.
- [Calculator](https://guide.plumber.gov.sg/user-guides/actions/calculator.md): Use Calculator to perform math operations on numbers in your pipe. No connection is required.
- [Executions page](https://guide.plumber.gov.sg/user-guides/executions-page.md): This page will guide you on how to interpret the status and information on the executions page.
- [Pipe settings](https://guide.plumber.gov.sg/user-guides/pipe-settings.md): This page can be found within each pipe. To access this page, enter your pipe and click on the Gear icon on the top right corner of the page.