Setup guide

This connects your company's LINE Official Account to your CRM: customer LINE messages appear in your CRM inbox, and staff reply to LINE directly from the CRM.

1. You will collect two secret values from the LINE Developers Console — think of them as two passwords.
2. Channel Secret — found in the “Basic settings” tab.
3. Channel Access Token (long-term) — found at the very bottom of the “Messaging API” tab.
4. Use a computer (the LINE console is hard to use on a phone) and have your regular LINE login ready.

⚠️ Handle both values like passwords — only paste them into the LINE settings page of your CRM. If a token ever leaks, you can invalidate it and get a new one (see Troubleshooting).

1. Open https://developers.line.biz/console/ and click Log in with LINE account.
2. No LINE account yet? Install the LINE app on your phone, register an account (a phone number is required), then come back here.
3. First time here? LINE asks you to register as a developer — enter your name and email address, and agree to the terms. This is a one-time step.
4. You land on the Console home. Your company name appears in the left sidebar under Providers.

If your channel list already shows a channel with a green “Messaging API” badge, skip to the next section.

1. Click your provider name (your company) in the sidebar.
2. Click Create a Messaging API channel.
3. Fill in the form — channel name (your LINE account name), a short description, a business category, and an email address — and confirm. LINE creates the channel and the matching LINE Official Account that customers will add as a friend.

1. In the sidebar, click your provider, then your channel name.
2. Open the first tab, Basic settings.
3. Scroll all the way down — the secret sits near the bottom, just above Your user ID.
4. Click the copy icon 📄 next to Channel secret.
5. Paste it into the Channel Secret field on the LINE Integration settings page (in your business account's left sidebar) — click Edit first if the fields aren't shown yet.

1. Open the second tab, Messaging API.
2. Scroll to the very bottom — past the QR code and the webhook switches — until you reach Channel access token (long-term).
3. See an Issue button? Click it once and a long token string appears. See Reissue instead? A token already exists — just copy the string.
4. Click the copy icon 📄.
5. Paste it into the Channel Access Token field on the same settings page.

⚠️ Reissuing instantly invalidates the old token — the connection stops working until the new one is saved on the settings page. Only reissue when needed.

1. Once both fields are filled, click Save.
2. Green confirmations appear: Saved, plus “The Webhook URL was registered automatically” — the connection address is set for you; you never type the Webhook URL by hand.
3. Only changing one value? Leave the other field blank — blank means “keep the current value”.
4. A mistyped token is rejected immediately with an error, so you can simply retry.
5. The badges at the top of the settings page should now show App connected and LINE configured. If the Webhook line mentions a different URL, click Edit → Save once more.

1. Back in the Developers Console, Messaging API tab (the same place as section 4), scroll to Webhook settings.
2. Turn ON (green): Use webhooks — the most important one; without it, no messages arrive.
3. Turn ON: Webhook redelivery — retries failed deliveries.
4. Optional check: click Verify under the Webhook URL — “Success” confirms the connection is live.

1. On your phone, scan the QR code at the top of the Messaging API tab with the LINE app and add your Official Account as a friend.
2. Send it any message, e.g. “Hello”.
3. The message should appear in your CRM inbox within a few seconds.
4. Reply from the CRM — the reply arrives on your phone's LINE.

Wondering what the app adds to your business account? It creates contacts for LINE users (with a generated +1000… phone number for conversation threading) and workflow components. The full reference explains each one.

“The LINE token is invalid” when saving — The token was copied incompletely or has expired. In section 4, click Reissue, copy the new token, and save it above.

Webhook status says “Use webhooks: OFF” — Turn on Use webhooks (section 6).

Messages reach LINE but never appear in the CRM — Check section 6 first (the #1 cause). Then make sure the settings page doesn't warn about a different URL — re-save if it does.

Replies from the CRM never reach LINE — The token was likely reissued or invalidated — reissue and save again.

Customers get automatic answers staff never sent — Those are LINE's built-in automatic replies — they are sent by LINE and never appear in the CRM. Edit or disable them in the LINE Official Account Manager (see the notice on the LINE settings page).

Messages I send from the LINE app don't appear in the CRM — This is a LINE platform limitation: anything LINE itself sends (chat from the LINE Official Account Manager app, broadcasts, automated and greeting messages) is never shown in the CRM — LINE provides no data about it. Reply from the CRM instead (inbox or mobile app).

Still stuck — Contact your account manager with a screenshot of the settings page.