n8n-nodes-linewebhook

This is a community node for n8n that allows you to interact with the LINE Messaging API. It lets you create a LINE chatbot with n8n, often without any coding required.

Documentation Versions

• English (This document)
• ภาษาไทย (Thai Version)

Table of Contents

• Installation
• Nodes and Operations
• Credentials
• Example Workflow
• Running Locally

Installation

Community Nodes (Recommended)

1. Go to Settings > Community Nodes.
2. Select Install.
3. Enter n8n-nodes-line-messaging-api in the Enter npm package name field.

4. Agree to the risks of using community nodes by selecting I understand the risks of installing unverified code from a public source.
5. Select Install

After installing, the node will appear in the Nodes panel and can be used like any other node.

!Community node installation

Manual Installation

To install this node manually, install the package in your n8n root directory:

npm install n8n-nodes-linewebhook

For Docker-based deployments, add the following line to your n8n Dockerfile before the font installation command:

Nodes and Operations

This package includes two main nodes:

1. Line Webhook (Trigger Node)

This trigger node starts your workflow when your bot receives an event from the LINE Platform.

!Line Webhook Node !Line Webhook Settings

Supported Event Types:

• message (with subtypes: text, image, video, audio, location, sticker)
• postback
• join / leave
• memberJoined / memberLeft

2. Line (Regular Node)

This node performs actions using the LINE Messaging API.

Operation: Send Message

Sends a message. You can specify a replyToken to reply to an event from the webhook trigger, or a targetRecipient (like a User ID or Group ID) to push a message.

You can compose various message types, including:

• Text
• Image
• Video
• Audio
• Location
• Sticker
• Flex Message (using the JSON editor)

Operation: Get Message Content

When a webhook event contains a multimedia message (like an image or video), it only includes a messageId. Use this operation with the messageId to retrieve the actual file content. This is useful for saving user-submitted images to a service like AWS S3 or processing audio files.

See the official API documentation for more details.

Operation: Get User Profile

Retrieves a user's profile information (display name, picture URL, status message) using their User ID.

See the official API documentation for more details.

Operation: Get Group Chat Summary

Retrieves the summary of a group chat (group name and picture URL) using its Group ID.

See the official API documentation for more details.

Credentials

You'll need credentials from the LINE Developer Console for your Messaging API channel.

Webhook Credentials

Used by the Line Webhook trigger to verify that incoming requests are from LINE.

1. In your LINE Developer Console, navigate to your channel's Messaging API settings.
2. Copy the Channel secret.
3. In the n8n Line Webhook node, create a new credential and paste the Channel Secret into the corresponding field.
4. Copy the webhook URL from the n8n node and paste it into the Webhook URL field in your LINE channel settings.

!Set up channel secret

Messaging API Credentials

Used by the Line node to make authenticated API calls (e.g., sending messages).

1. In your LINE Developer Console, go to the Messaging API settings page.
2. Find and copy the Channel access token (you may need to issue one if it doesn't exist).
3. In the n8n Line node, create a new credential and paste this token into the Channel Access Token field.

!Credential example for Line Messaging API node

Example Workflow

A common use case is to receive a message and send an immediate reply.

1. Add a Line Webhook trigger node to your canvas. Configure its credentials and copy the webhook URL to your LINE channel.
2. Add a Line node.
3. Connect the output of the trigger to the input of the Line node.
4. In the Line node, set the operation to Send Message.
5. For the Reply Token parameter, use an expression to get the token from the trigger node: {{ $json.events[0].replyToken }}.
6. Compose your reply message in the Messages parameter.

!Connect message node to api node !Set up the api node to send message

Running Locally

When running n8n on your local machine, the webhook URL (e.g., http://localhost:5678) is not accessible from the internet. To receive webhooks from LINE, you need a tunneling service to expose your local n8n instance to the web.

Popular options include:

• ngrok
• Cloudflare Zero Trust Tunnels