# Messaging and Voice Channels

To make your assistant available on a messaging platform you need to provide credentials in a `credentials.yml` file. An example file is created when you run `rasa init`, so it’s easiest to edit that file and add your credentials there. Here is an example with Facebook credentials:

```
facebook:
  verify: "rasa-bot"
  secret: "3e34709d01ea89032asdebfe5a74518"
  page-access-token: "EAAbHPa7H9rEBAAuFk4Q3gPKbDedQnx4djJJ1JmQ7CAqO4iJKrQcNT0wtD"
```

Learn how to make your assistant available on:

- [Your Own Website](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/your-own-website/)
- [Facebook Messenger](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/facebook-messenger/)
- [Slack](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/slack/)
- [Telegram](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/telegram/)
- [Twilio](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/twilio/)
- [Microsoft Bot Framework](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/microsoft-bot-framework/)
- [Cisco Webex Teams](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/cisco-webex-teams/)
- [RocketChat](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/rocketchat/)
- [Mattermost](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/mattermost/)
- [Google Hangouts Chat](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/hangouts/)
- [Custom Connectors](https://legacy-docs-v1.rasa.com/1.9.1/user-guide/connectors/custom-connectors/)

## Testing Channels on Your Local Machine with Ngrok

You can use [ngrok](https://ngrok.com/) to create a connection to your local computer that is publicly available on the internet. You don’t need this when running Rasa on a server because, you can set up a domain name to point to that server’s IP address, or use the IP address itself.

After installing ngrok, run:

```
ngrok http 5005; rasa run
```

Your webhook address will look like the following:

- `https://yyyyyy.ngrok.io/webhooks/<CHANNEL>/webhook`, e.g.
- `https://yyyyyy.ngrok.io/webhooks/facebook/webhook`

**Warning**  
With the free-tier of ngrok, you can run into limits on how many connections you can make per minute. As of writing this, it is set to 40 connections / minute.