> For the complete documentation index, see [llms.txt](https://help.3sigmacrm.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.3sigmacrm.com/whatsapp-business-api.md).

# Whatsapp business API

- [Intro- Whatsapp business API](https://help.3sigmacrm.com/whatsapp-business-api/intro-whatsapp-business-api.md)
- [WABA API onboarding](https://help.3sigmacrm.com/whatsapp-business-api/waba-api-onboarding.md)
- [Inbox](https://help.3sigmacrm.com/whatsapp-business-api/inbox.md)
- [Templates](https://help.3sigmacrm.com/whatsapp-business-api/templates.md)
- [Campaigns](https://help.3sigmacrm.com/whatsapp-business-api/campaigns.md)
- [Common errors and FAQ's](https://help.3sigmacrm.com/whatsapp-business-api/common-errors-and-faqs.md)
- [Common template/payment issues](https://help.3sigmacrm.com/whatsapp-business-api/common-template-payment-issues.md)
- [Green Tick Verification Badge: What It Is and How to Get It](https://help.3sigmacrm.com/whatsapp-business-api/green-tick-verification-badge-what-it-is-and-how-to-get-it.md)