# Connect n8n to Mattermost

Source: https://langbot.app/docs/en/recipes/n8n/mattermost

Step-by-step guide to running your n8n app as a Mattermost bot with LangBot: n8n setup, bot credentials, networking, testing and troubleshooting.

This recipe puts your n8n app behind a Mattermost bot. LangBot receives messages from Mattermost, runs them through a pipeline, and sends the answer back, so you do not write any platform code.

n8n runs the workflow; LangBot handles the chat platform, sessions and delivery and calls your workflow through a webhook for every message.

## What you need

- A running LangBot instance: [LangBot Cloud](https://space.langbot.app/cloud) (no server needed) or a [self-hosted deployment](https://langbot.app/docs/en/deploy/langbot/docker.md) with Docker or `uvx langbot`.
- A n8n account or instance that LangBot can reach over the network.
- A Mattermost **bot account** (role `Member`) and its access token, plus your Mattermost server URL.

## Networking

LangBot only needs to reach your Mattermost server; Mattermost does not need to reach LangBot.

## 1. Prepare n8n

1. Start the workflow with a **Webhook** or **On chat message** trigger. Set **Response Mode** to **Streaming** if you want streamed replies.
2. Answer with an **AI Agent** node (streaming) or a **Respond to Webhook** node whose response key matches LangBot's output key.
3. Click **Active** to enable the workflow and copy its production webhook URL.

## 2. Create a pipeline

Open **Pipelines** in the LangBot WebUI, create a pipeline (or edit the default one) and set **AI** as follows. If the runner is not listed, install the official runner plugin from **Plugins** or the [LangBot Space marketplace](https://space.langbot.app/market).

| Field               | Value                                                      |
| ------------------- | ---------------------------------------------------------- |
| Runner              | **n8n** (official n8n workflow runner plugin)              |
| Webhook URL         | The workflow's production webhook URL                      |
| Authentication Type | None, Basic Auth, JWT or Header, matching the trigger node |

## 3. Create the Mattermost bot

1. Create the bot account in Mattermost (choose `post:all` for direct messages) and copy its token; it is shown only once.
2. Create a bot with the **Mattermost** adapter, enter the server address and token, and bind a pipeline.

## 4. Bind and test

Open the bot, select the pipeline you created, save and make sure the bot is enabled.

Send the bot a direct message, or mention it in a channel it has joined.

## Troubleshooting

- Empty replies: the key in **Respond to Webhook** must match the output key configured in LangBot.
- The test URL only works while the n8n editor is listening; use the production URL of an active workflow.
- Administrator-related features are not supported; keep the bot role as `Member`.
- Disable streaming on the bot if your pipeline or AI provider does not support it.
- Check **Monitoring** in the WebUI: every message, pipeline run and error is recorded there.

## FAQ

### Do I need a server with a public IP for Mattermost?

No. LangBot only needs to reach your Mattermost server; Mattermost does not need to reach LangBot.

### Does the Mattermost bot support streaming replies?

Yes. Enable streaming on the bot; the AI back end must also stream. See the [platform feature matrix](https://langbot.app/docs/en/insight/platform-features.md) for details.

### Can the same n8n setup serve other platforms too?

Yes. A pipeline can be bound to many bots, so one configuration can answer on several platforms at once.

## Related guides

- [Full Mattermost setup guide](https://langbot.app/docs/en/usage/platforms/mattermost.md)
- [Full n8n runner guide](https://langbot.app/docs/en/usage/pipelines/n8n.md)
- Other AI back ends on Mattermost: [Dify](https://langbot.app/docs/en/recipes/dify/mattermost.md) · [Coze](https://langbot.app/docs/en/recipes/coze/mattermost.md) · [Langflow](https://langbot.app/docs/en/recipes/langflow/mattermost.md) · [DeepSeek](https://langbot.app/docs/en/recipes/deepseek/mattermost.md) · [OpenAI (ChatGPT models)](https://langbot.app/docs/en/recipes/openai/mattermost.md)
- n8n on other platforms: [Telegram](https://langbot.app/docs/en/recipes/n8n/telegram.md) · [Discord](https://langbot.app/docs/en/recipes/n8n/discord.md) · [Slack](https://langbot.app/docs/en/recipes/n8n/slack.md) · [Lark (Feishu)](https://langbot.app/docs/en/recipes/n8n/lark.md) · [DingTalk](https://langbot.app/docs/en/recipes/n8n/dingtalk.md) · [WeCom (internal app)](https://langbot.app/docs/en/recipes/n8n/wecom.md)