Before you begin, confirm these four items
LINE Pay merchant account
Online payments must be enabled. An in-store QR Code account cannot connect directly.
Two server IPs
Both IP addresses must be allowlisted.
Channel ID
Available in LINE Pay under Manage Link Key.
Channel Secret Key
Treat this as sensitive information and never share it publicly.
Sign in to LINE Pay Merchant Center
Make sure you can access the merchant administration interface.
Open LINE Pay Merchant Center and sign in with the merchant administrator account. You should see the store name, transaction summary, and navigation on the left.
LINE Pay Merchant Center
Configure payment server IPs
Add both MeFresh servers to the LINE Pay allowlist.
Expand Developer Tools and select Manage Payment Server IP. Add each IP address on a separate row.
- Enter the first IP in the four fields, then select Add.
- Add a new row and enter the second IP.
- Keep the default Mask value of 32 unless instructed otherwise.
- Confirm both entries were added successfully.
Get the LINE Pay link keys
Copy two values to use in MeFresh.
Open Developer Tools → Manage Link Key and select Search. Complete email verification when prompted, then copy the integration values.
Channel IDChannel Secret KeyCopy each value exactly without leading or trailing spaces. The Channel Secret Key is the merchant integration password; only paste it into MeFresh and never send it in a public chat.
Finish the integration in MeFresh
Reset the Channel details, save, and run a test payment.
Return to the LINE Pay merchant application page in MeFresh. Find the application marked Channel update available and choose Reset. Enter the Channel ID and the complete Channel Secret, then submit the settings.
- Confirm the application says Channel update available
- Enter the Channel ID
- Re-enter the complete Channel Secret
- Submit the settings and run a test booking with a deposit payment
If you get stuck
Manage Payment Server IP is missing
Your account may only support in-store QR payments. Contact LINE Pay to apply for online payments.
The connection still fails after adding the IPs
Confirm that both IPs are present on separate rows and keep the Mask value at 32 unless otherwise specified.
Key validation fails
Check that Channel ID and Channel Secret Key are not reversed, contain no extra spaces, and are not Sandbox credentials.
The verification email did not arrive
Check the contact email registered in LINE Pay Merchant Center, including its spam folder.
Still not connected? We'll look with you
Send MeFresh the error message and the steps that caused it. Always hide the Channel Secret Key before sharing a screenshot.
Contact MeFresh