> For the complete documentation index, see [llms.txt](https://kasplo.gitbook.io/kasplo-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kasplo.gitbook.io/kasplo-doc/channels.md).

# Channels

- [Email Marketing](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing.md)
- [API Authentication](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/api-authentication.md)
- [GET List API](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/get-list-api.md)
- [GET Tag API](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/get-tag-api.md)
- [Add Contact API](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/add-contact-api.md)
- [GET Custom-field API](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/get-custom-field-api.md)
- [Error Handling](https://kasplo.gitbook.io/kasplo-doc/channels/email-marketing/error-handling.md)
- [SMS](https://kasplo.gitbook.io/kasplo-doc/channels/sms.md)
- [Whatsapp](https://kasplo.gitbook.io/kasplo-doc/channels/whatsapp.md)
- [Transactional (API/SMTP)](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp.md)
- [Advanced Features](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/advanced-features.md)
- [Kasplo Bounce Processing](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/kasplo-bounce-processing.md)
- [Email API](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api.md)
- [API Custom header](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api/api-custom-header.md)
- [API Bcc & CC emails](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api/api-bcc-and-cc-emails.md): Send emails with support for single recipients or multiple recipients with CC/BCC functionality.
- [Sending Transactional Emails](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api/sending-transactional-emails.md): To send transactional emails, simply add the type parameter with the value "transactional" at the root level of the request body.
- [Scheduled Send via API](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api/scheduled-send-via-api.md)
- [API Errors & Status Codes](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/email-api/api-errors-and-status-codes.md)
- [SMTP Send](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/smtp-send.md)
- [SMTP Custom header](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/smtp-send/smtp-custom-header.md)
- [SMTP Bcc & CC emails](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/smtp-send/smtp-bcc-and-cc-emails.md)
- [Sending Transactional Emails](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/smtp-send/sending-transactional-emails.md)
- [Scheduled Send via SMTP](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/smtp-send/scheduled-send-via-smtp.md)
- [AMP Email](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/amp-email.md)
- [Override Link Tracking](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/override-link-tracking.md)
- [Code Samples](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples.md)
- [Python](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/python.md)
- [Ruby](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/ruby.md)
- [PHP](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/php.md)
- [Golang](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/golang.md)
- [Node](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/node.md)
- [Java](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/java.md)
- [C#](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/code-samples/c.md)
- [Webhooks](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/webhooks.md)
- [Sample webhook response](https://kasplo.gitbook.io/kasplo-doc/channels/transactional-api-smtp/webhooks/sample-webhook-response.md)
- [Email Intelligence](https://kasplo.gitbook.io/kasplo-doc/channels/email-intelligence.md)
- [Email Verification](https://kasplo.gitbook.io/kasplo-doc/channels/email-verification.md)
- [Status Guide](https://kasplo.gitbook.io/kasplo-doc/channels/email-verification/status-guide.md)