LINE

Our business messaging API supports sending and receiving LINE messages.

Being able to send LINE messages requires requesting access via the Channels portal. Without onboarding LINE via the portal, you can not make use of this part of the API.

Fact sheet

Feature	Support	Remarks
text messages	yes	The maximum length of a LINE message is 5.000 characters, and it must be UTF-8 encoded.
media	yes	The media name attribute should end in the proper file extension. Only one media file is allowed per message. When the linked media doesn't exist/can't be found, the message will not be sent at all.
media: images	yes	Maximum file size for an uploaded image is 10 MB. Supported formats: png, jpeg and jpg.
media: videos	yes	Maximum file size for an uploaded image is 200 MB. Supported formats: mp4.
media: audio	no
rich card message	no
rich card carousel	no
quick replies	no
sticker message	no
location message	no

Onboarding

Onboarding pages for LINE are in development, in the meantime you are welcome to onboard for LINE via your customer success manager.

Sending messages

Input matrix

Text	Media	Suggestions	Header	Output
x	x	x	x	Not supported
√	x	x	x	Text message
x	√	x	x	Media message

Text

Direct message with plain text content

The example below will send a simple text-only LINE message.

{
    "messages": {
        "authentication": {
            "producttoken": "Your product token"
        },
        "msg": [
            {
                "from": "Your Channel ID",
                "to": [
                    {
                        "number": "Recipients ID"
                    }
                ],
                "allowedChannels": [
                    "Line"
                ],
                "body": {
                    "content": ""
                },
                "richContent": {
                    "conversation": [
                        {
                            "text": "CM.com - Be part of it."
                        }
                    ]
                }
            }
        ]
    }
}

Media

Media type	Supported formats	Mime type	Supported size maximum
Image	png, jpeg, jpg	image/png, image/jpeg, image/jpg	10MB
Video	mp4	video/mp4	200MB

Direct message with image

In the example below, we send a simple rich content message that contains an image.

{
    "messages": {
        "authentication": {
            "producttoken": "Your product token"
        },
        "msg": [
            {
                "from": "Your Channel ID",
                "to": [
                    {
                        "number": "Recipients ID"
                    }
                ],
                "body": {
                    "content": ""
                },
                "allowedChannels": [
                    "Line"
                ],
                "richContent": {
                    "conversation": [
                        {
                            "media": {
                                "mediaName": "cm.png",
                                "mediaUri": "https://www.cm.com/cdn/cm/cm.png",
                                "mimeType": "image/png"
                            }
                        }
                    ]
                }
            }
        ]
    }
}

Direct message with video

In the example below, we send a simple rich content message that contains a video.

{
    "messages": {
        "authentication": {
            "producttoken": "Your product token"
        },
        "msg": [
            {
                "from": "Your Channel ID",
                "to": [
                    {
                        "number": "Recipients ID"
                    }
                ],
                "body": {
                    "content": ""
                },
                "allowedChannels": [
                    "Line"
                ],
                "richContent": {
                    "conversation": [
                        {
                            "media": {
                                "mediaName": "your-video.mp4",
                                "mediaUri": "your-video-url.mp4",
                                "mimeType": "video/mp4"
                            }
                        }
                    ]
                }
            }
        ]
    }
}

Receiving messages / Inbound flow

Since LINE is used for 2-way communication (chat) it is important to also implement an Inbound flow. You can find more information about how to do this using our API documentation of the Inbound webhook.