Turn your LINE inbox into a smart helper that answers questions, checks your calendar, and looks up email details. It keeps chats moving fast and gives clear replies without you switching apps. Great for support teams and small businesses that talk to customers on LINE.

Messages come into n8n from a LINE webhook. A switch checks if the message is text. If not, a friendly reply asks for text. If yes, an AI Agent reads the message and keeps the chat context by user ID. The agent uses GPT 4o mini, can read Gmail, check or create Google Calendar events, and pull facts from Wikipedia. A second OpenAI step condenses the answer into a short and readable message. A text cleaning step removes extra line breaks, then a reply is sent back to LINE using the official API. If anything goes wrong, an error path sends a safe fallback reply.

Setup needs a LINE Messaging API channel, an OpenAI API key, and Google access for Calendar and Gmail. After connecting credentials, set your LINE webhook to the n8n URL and paste your LINE channel access token into the reply nodes. Expect faster first responses, fewer tab switches, and less manual scheduling. Use it for booking, FAQ replies, inbox checks, and simple research in one chat thread.

• LINE webhook receives incoming messages and passes them into n8n
• Message type filter routes non text messages to a friendly fallback reply
• AI Agent with per user memory keeps context across the conversation
• GPT 4o mini generates helpful answers with natural language
• Gmail tool reads emails to fetch details mentioned in the chat
• Google Calendar tools read and create events for scheduling
• Wikipedia tool adds general knowledge for quick facts
• OpenAI post processing condenses the answer into a clear format
• Text cleansing removes extra line breaks before sending
• HTTP reply to the LINE Messaging API returns the final message

• Reduce first response time on LINE from minutes to seconds
• Automate up to 70 percent of repetitive replies and lookups
• Cut double booking by creating events directly from chat
• Handle up to 5 times more chat volume with the same team
• Connect LINE, Gmail, Google Calendar, and Wikipedia in one flow

1. Import the template into n8n: Create a new workflow in n8n > Click the three dots menu > Select 'Import from File' > Choose the downloaded JSON file.
2. You'll need accounts with LINE Messaging API, OpenAI, Google Calendar, Gmail and Wikipedia. See the Tools Required section above for links to create accounts with these services.
3. Open the AI model node and create an OpenAI credential: in the Credential dropdown click Create new credential, paste your OpenAI API key from the OpenAI API keys page, and save.
4. Connect Google: open the Google Calendar Read and Google Calendar Create nodes, and the Gmail Read tool node. For each, choose Create new credential, select your Google account, and approve the requested scopes.
5. In the two HTTP Request nodes that send replies to LINE, paste your LINE channel access token into the Authorization header value as Bearer YOUR_TOKEN and save.
6. In the Line Receiving webhook node, copy the Production URL. In the LINE Developers console for your Messaging API channel, enable webhooks and set the webhook URL to this address, then verify the connection.
7. In the Google Calendar nodes, select the correct calendar to read from and create events in. Save the node settings.
8. Review the AI Agent system message and tools. Ensure the memory node is connected so each user keeps conversation context.
9. Run a test: send a text message to your LINE bot. You should get a concise reply. Try a non text message and confirm you receive the fallback message.
10. If you see no reply, check the LINE webhook verification status. If you get 401 errors on the reply nodes, confirm the LINE token. If Google actions fail, reauthenticate the Google credentials.