Connecting to LINE

Supported Message Types

Version v4.17.0.

Message Type	Receive Support	Send Support	Notes
Text	Yes	Yes
Image	Yes	Yes
Voice	Yes	Yes
Video	Yes	Yes
File	Yes	Yes
Sticker	Yes	No

Proactive message push: Supported.

Create a LINE Messaging API Channel

1. Open the LINE Developers Console
2. Create or select a Provider
3. Create a Messaging API channel (not a LINE Login channel)
4. Complete bot initialization on the Messaging API page

Get Credentials

You need the following values:

• channel_secret
• channel_access_token

How to get them:

1. Open your channel settings page
2. Get Channel secret from Basic settings
3. Issue a Channel access token on the Messaging API page

Configure AstrBot

1. Open the AstrBot admin panel
2. Click Bots in the left sidebar
3. Click + Create Bot
4. Select line

Fill in these fields:

• ID: Custom identifier to distinguish instances
• Enable: Checked
• LINE Channel Access Token: your channel_access_token
• LINE Channel Secret: your channel_secret
• LINE Bot User ID: optional; if empty, AstrBot uses webhook destination

Click Save.

Configure Callback URL (Unified Webhook)

The LINE adapter supports unified webhook mode only.

After saving, click View Webhook URL on the bot card and copy the URL.

Then in LINE Developers Console:

1. Open Messaging API
2. Paste the URL into Webhook settings -> Webhook URL
3. Click Verify
4. Enable Use webhook

[!TIP] If AstrBot is not publicly reachable, set up a public domain and reverse proxy first so LINE can access your webhook URL.

Test

1. Add your Official Account as a friend in LINE
2. Send a message to the bot (for example, hi)
3. If the bot replies, setup is successful

If you want to use it in a group, invite the Official Account to the group first.