--- title: "Setting Up LINE Messaging API for Uptime Kuma Service Alerts" description: "How to apply for the LINE Messaging API and integrate it with Uptime Kuma so that service-monitoring alerts are pushed automatically to LINE." canonical_url: "https://blog.markkulab.net/en/post/line-messaging-for-uptime-kuma" author: "Mark Ku" author_url: "https://blog.markkulab.net/en/author/mark-ku" site: "Mark Ku's Tech Notes" date_published: "2022-01-04 01:01:01 +0800" category: "DevOps" tags: ["line", "messaging api", "uptime kuma", "monitoring", "notification", "devops", "alert"] language: "en" license: "CC BY 4.0" license_url: "https://creativecommons.org/licenses/by/4.0/" attribution: "when reusing or quoting, credit the author and link back to the original" --- # Setting Up LINE Messaging API for Uptime Kuma Service Alerts ## What this solves Earlier I wrote a post about using [Uptime Kuma](https://blog.markkulab.net/2021/12/11/application-monitor-uptime-kuma/) to monitor whether sites and services are running properly. I later found out it supports LINE notifications, so I'm taking the chance to document the application process here. ### To use LINE notifications in Uptime Kuma, we need to obtain a user ID and access token from the LINE Messaging API ![Uptime Kuma Line Messenger notification settings with API fields](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/0lMu89n.png) ### Sign in / register a LINE Bot developer account [[LINE Developers site]](https://manager.line.biz/) ### Create a new chat group > Create a new channel ![LINE Developers console showing App Monitor channels and creation option](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/QlN1UkJ.png) ### Fill in the required fields > Channel type > Messaging API Submit. ![LINE Developers create new channel form for LetGo App Monitor](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/nsXkjNW.png) ### Switch to the Basic settings tab ![LINE App Monitor Basic settings tab highlighted](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/EwiZhGW.png) ### Scroll to the bottom of the page and copy the user ID we'll use later ![LINE Developers Basic settings page with highlighted user ID field](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/0hjTHoi.png) ### Switch to the Messaging API tab ![LINE App Monitor interface with Messaging API tab highlighted](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/NRn2ND0.png) ### Scroll to the bottom and click the Issue button ![LINE Developers Messaging API tab, 'Issue' button for channel token](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/pkQpAeU.png) ### After clicking Issue, the LINE bot's access token is generated — copy it ![LINE Developers console showing generated channel access token](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/U9MhBCA.png) ### Back at the top of the Messaging API tab, scan the provided QR code with your phone and add the bot as a friend ![LINE Developers console Messaging API tab with bot QR code](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/4UmXn3i.png) ### Paste the user ID and token into Uptime Kuma's notification settings, then click Test — a test message should arrive in your LINE app ![LINE chat showing multiple Test Successful and an UptimeKuma alert](https://blog.markkulab.net/content/markku/posts/line-messaging-for-uptime-kuma/images/Rwnyx1I.png) ## How LINE push messaging works We can also learn how various community push integrations are wired up by reading [Uptime Kuma's source](https://github.com/louislam/uptime-kuma/blob/master/server/notification-providers). Looking at the code, you just need to send your message payload to LINE's API and it pushes it to the user. However, LINE enforces CORS restrictions. Sending from the backend avoids the CORS issue. Alternatively, open a browser to [LINE's API endpoint](https://api.line.me/v2/bot/message/push) and run the following in the console: ``` fetch("https://api.line.me/v2/bot/message/push", { body: JSON.stringify( { "to": 'your line bot id', // linebot id "messages": [ { "type": "text", "text": "Test Successful!" } ] }), // must match 'Content-Type' header cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached credentials: 'same-origin', // include, same-origin, *omit headers: { 'content-type': 'application/json', 'Authorization':'Bearer api token' // api token }, method: 'POST', // *GET, POST, PUT, DELETE, etc. }) .then(response => response.json()) // 輸出成 json ``` Your LINE app will then receive the message from the bot. --- ## About this article and its author Originally published on [Mark Ku's Tech Notes](https://blog.markkulab.net/en/post/line-messaging-for-uptime-kuma) License: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) — when reusing or quoting, credit the author and link back to the original ### About the author **[Mark Ku](https://blog.markkulab.net/en/author/mark-ku)** — Software Solution Provider - 10+ years senior software engineer, now an AI Builder - Focused on large-platform architecture — North-American e-commerce, AI SaaS subscription billing - Combining AI Agents and automation to build evolvable product foundations ### Free tools built by the author All of these are free to use: - [Free PDF Sign Tool](https://blog.markkulab.net/en/tools/pdf-sign): Online PDF sign tool — draw, type, or upload a signature, then drag, resize, and download. 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