> ## Documentation Index
> Fetch the complete documentation index at: https://docs.groundforge.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Channels

> Understand the messaging providers available and how a Channel connects to an Agent.

A Channel is the entry and delivery point for an Agent. It receives a provider callback, verifies it, converts the message into a common GroundForge input, sends the request to the attached Agent, and delivers the final response.

The Channel owns transport settings and provider credentials. The Agent owns model and tool credentials.

## Available Channels

| Twilio WhatsApp                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | Mailgun email                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | Slack                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | JSON webhook                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  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| <img src="https://mintcdn.com/groundforgeai/V4bCNZADLwZmOUhb/images/logos/twilio.svg?fit=max&auto=format&n=V4bCNZADLwZmOUhb&q=85&s=23137771bd5787e2f879be0b011b0f6f" alt="Twilio WhatsApp" width="180" height="52" data-path="images/logos/twilio.svg" /> | <img src="https://mintcdn.com/groundforgeai/V4bCNZADLwZmOUhb/images/logos/mailgun.svg?fit=max&auto=format&n=V4bCNZADLwZmOUhb&q=85&s=e44f0beff51cba2ce8e643efff40199b" alt="Mailgun email" width="190" height="52" data-path="images/logos/mailgun.svg" /> | <img src="https://mintcdn.com/groundforgeai/V4bCNZADLwZmOUhb/images/logos/slack.svg?fit=max&auto=format&n=V4bCNZADLwZmOUhb&q=85&s=bbd3c9f49d4ac80988ae7897c35bca1e" alt="Slack" width="170" height="52" data-path="images/logos/slack.svg" /> | <img src="https://mintcdn.com/groundforgeai/V4bCNZADLwZmOUhb/images/logos/webhook.svg?fit=max&auto=format&n=V4bCNZADLwZmOUhb&q=85&s=d78ae7cf3160792c859045b3c88be684" alt="JSON webhook" width="180" height="52" data-path="images/logos/webhook.svg" /> |

| Channel         | Typical use                                         |
| --------------- | --------------------------------------------------- |
| Twilio WhatsApp | Receive and reply to WhatsApp messages              |
| Mailgun         | Receive and reply to email                          |
| Slack           | Connect a Slack conversation to an Agent            |
| JSON webhook    | Connect an application that sends and receives JSON |

Create and configure them from [Channels in the platform](/platform/channels).

## Callback URL

After you attach a Channel and publish the Agent, GroundForge shows the recommended provider callback URL:

```text theme={null}
https://platform.groundforge.ai/v1/agents/{agent_id}/channels/{channel_id}/callback
```

The IDs are stable even if you rename the Agent or Channel. Copy the generated URL from the Channel or published Agent page rather than typing it manually.

Twilio may also use a separate status callback when status reporting is enabled:

```text theme={null}
https://platform.groundforge.ai/v1/integrations/twilio/whatsapp/status/{channel_id}
```

## Example

<Card title="groundforgeai/demo" icon="github" iconType="brands" href="https://github.com/groundforgeai/demo" horizontal cta="Open repository">
  Attach Twilio WhatsApp or Mailgun to the LangChain weather Agent and ask for the weather in a city.
</Card>

Continue with [Twilio WhatsApp](/guides/twilio-whatsapp), [Mailgun](/guides/mailgun), or [LangChain Agent Example](/examples/langchain-agent).


## Related topics

- [Channels](/platform/channels.md)
- [Get Channel](/api-reference/endpoints/channels/get-channel.md)
- [Test Channel](/api-reference/endpoints/channels/test-channel.md)
- [Update Channel](/api-reference/endpoints/channels/update-channel.md)