# Sinch Conversation API
You don't have to think about which type of message works with which channel – the **Sinch Conversation API** transcodes the messages automatically to match the target channel. Easy peasy!
## Supported channels
You will find a complete list of the channels supported by the Sinch Conversation API is [here](https://developers.sinch.com/docs/conversation/channel-support/).
How to deal with variables across channels
f multiple channels are connected to your Conversation API app, it can be useful to be able to send a specific flow depending on the channel the bot user is on. To do that, you can use the `internal.sinchConversationAPI.channelIdentifier` [variable](https://docs.chatlayer.ai/navigation/settings/secure-variables-gdpr).
The possible values for the channel are:
```
internal.sinchConversationAPI.channelIdentifier:
"CHANNEL_UNSPECIFIED"
"WHATSAPP"
"RCS"
"SMS"
"MESSENGER"
"VIBER"
"VIBERBM"
"MMS"
"TELEGRAM"
"LINE"
"INSTAGRAM"
```
Furthermore, there are a few other variables that store data coming from the Sinch Conversation API that might be useful to guide your flow:
```
internal.sinchConversationAPI.channelIdentity: 'USER_PHONE_NUMBER_OR_ID',
internal.sinchConversationAPI.contactId: 'CONTACT_ID_CONV_API',
internal.sinchConversationAPI.appId: 'APP_ID_CONV_API',
internal.sinchConversationAPI.conversationId: 'CONVERSATION_ID_CONV_API',
internal.sinchConversationAPI.metadata: string or key + value pair
```
You can learn more about how to use variables to guide your flow [here](https://docs.chatlayer.ai/buildabot/tips-and-best-practices/route-your-flow-depending-on-the-channel).
{% hint style="warning" %}
Bear in mind that different channels accepts different [message types](https://developers.sinch.com/docs/conversation/message-types/).
{% endhint %}
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