# API reference

* [channel-groups](https://docs.bird.com/api/channels-api/api-reference/channel-groups "mention")
* [messaging](https://docs.bird.com/api/channels-api/api-reference/messaging "mention")
* [channels-management](https://docs.bird.com/api/channels-api/api-reference/channels-management "mention")
* [channel-connectors](https://docs.bird.com/api/channels-api/api-reference/channel-connectors "mention")
* [navigators](https://docs.bird.com/api/channels-api/api-reference/navigators "mention")
* [compliance-keywords-messages](https://docs.bird.com/api/channels-api/api-reference/compliance-keywords-messages "mention")
* [sending-emails](https://docs.bird.com/api/channels-api/supported-channels/programmable-email/sending-emails "mention")
  * [#send-a-plain-text-email](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-a-plain-text-email "mention")
  * [#send-an-html-email](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-an-html-email "mention")
  * [#send-an-email-to-multiple-participants](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-an-email-to-multiple-participants "mention")
  * [#html-metadata](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#html-metadata "mention")
  * [#send-a-html-message-with-attachments](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-a-html-message-with-attachments "mention")
  * [#send-an-html-message-with-inline-images](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-an-html-message-with-inline-images "mention")
  * [#send-a-message-with-a-template](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-a-message-with-a-template "mention")
  * [#send-a-message-specifying-the-use-case](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-a-message-specifying-the-use-case "mention")
  * [#send-a-message-with-tags](https://docs.bird.com/api/supported-channels/programmable-email/sending-emails#send-a-message-with-tags "mention")
* [sending-sms-messages](https://docs.bird.com/api/channels-api/supported-channels/programmable-sms/sending-sms-messages "mention")
* [sending-whatsapp-messages](https://docs.bird.com/api/channels-api/supported-channels/programmable-whatsapp/sending-whatsapp-messages "mention")