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< meta property = "og:description" content = "ntfy is a simple HTTP-based pub-sub notification service. It allows you to send desktop notifications via scripts from any computer, entirely without signup or cost. Made with ❤ by Philipp C. Heckel, Apache License 2.0, source at https://heckel.io/ntfy." / >
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< h1 > ntfy.sh - simple HTTP-based pub-sub< / h1 >
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< p >
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< b > ntfy< / b > (pronounce: < i > notify< / i > ) is a simple HTTP-based < a href = "https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern" > pub-sub< / a > notification service.
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It allows you to send < b > desktop notifications via scripts from any computer< / b > , entirely < b > without signup or cost< / b > .
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It's also < a href = "https://github.com/binwiederhier/ntfy" > open source< / a > if you want to run your own.
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< / p >
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< p id = "error" > < / p >
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< h2 > Subscribe to a topic< / h2 >
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< p >
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Topics are created on the fly by subscribing to them. You can create and subscribe to a topic either in this web UI, or in
your own app by subscribing to an < a href = "https://developer.mozilla.org/en-US/docs/Web/API/EventSource" > EventSource< / a > ,
a JSON feed, or raw feed.
< / p >
< p >
Because there is no sign-up, < b > the topic is essentially a password< / b > , so pick something that's not easily guessable.
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< / p >
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< h3 > Subscribe via web< / h3 >
< p >
If you subscribe to a topic via this web UI in the field below, messages published to any subscribed topic
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will show up as < b > desktop notification< / b > .
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< / p >
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< form id = "subscribeForm" >
< p >
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< label for = "topicField" > Subscribe to topic:< / label >
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< input type = "text" id = "topicField" placeholder = "Letters, numbers, _ and -" pattern = "[-_A-Za-z]{1,64}" / >
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< input type = "submit" id = "subscribeButton" value = "Subscribe" / >
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< / p >
< / form >
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< p id = "topicsHeader" > Topics:< / p >
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< ul id = "topicsList" > < / ul >
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< audio id = "notifySound" src = "static/sound/mixkit-message-pop-alert-2354.mp3" > < / audio >
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< h3 > Subscribe via your app, or via the CLI< / h3 >
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< p class = "smallMarginBottom" >
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Using < a href = "https://developer.mozilla.org/en-US/docs/Web/API/EventSource" > EventSource< / a > , you can consume
notifications like this (see < a href = "https://github.com/binwiederhier/ntfy/tree/main/examples" > full example< / a > ):
< / p >
< code >
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const eventSource = new EventSource('https://ntfy.sh/mytopic/sse');< br / >
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eventSource.onmessage = (e) => {< br / >
// Do something with e.data< br / >
};
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< / code >
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< p class = "smallMarginBottom" >
Or you can use < tt > curl< / tt > or any other HTTP library. Here's an example for the < tt > /json< / tt > endpoint,
which prints one JSON message per line (keepalive and open messages have an "event" field):
< / p >
< code >
$ curl -s ntfy.sh/mytopic/json< br / >
{"time":1635359841,"event":"open"}< br / >
{"time":1635359844,"message":"This is a notification"}< br / >
{"time":1635359851,"event":"keepalive"}
< / code >
< p class = "smallMarginBottom" >
Using the < tt > /sse< / tt > endpoint (SSE, server-sent events stream):
< / p >
< code >
$ curl -s ntfy.sh/mytopic/sse< br / >
event: open< br / >
data: {"time":1635359796,"event":"open"}< br / > < br / >
data: {"time":1635359803,"message":"This is a notification"}< br / > < br / >
event: keepalive< br / >
data: {"time":1635359806,"event":"keepalive"}
< / code >
< p class = "smallMarginBottom" >
Using the < tt > /raw< / tt > endpoint (empty lines are keepalive messages):
< / p >
< code >
$ curl -s ntfy.sh/mytopic/raw< br / >
< br / >
This is a notification
< / code >
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< h2 > Publishing messages< / h2 >
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< p class = "smallMarginBottom" >
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Publishing messages can be done via PUT or POST using. Here's an example using < tt > curl< / tt > :
< / p >
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< code >
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curl -d "long process is done" ntfy.sh/mytopic
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< / code >
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< p class = "smallMarginBottom" >
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Here's an example in JS with < tt > fetch()< / tt > (see < a href = "https://github.com/binwiederhier/ntfy/tree/main/examples" > full example< / a > ):
< / p >
< code >
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fetch('https://ntfy.sh/mytopic', {< br / >
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method: 'POST', // PUT works too< br / >
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body: 'Hello from the other side.'< br / >
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})
< / code >
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< p >
Messages published to a non-existing topic or a topic without subscribers will not be delivered later.
There is (currently) no buffering of any kind. If you're not listening, the message won't be delivered.
< / p >
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< h2 > FAQ< / h2 >
< p >
< b > Isn't this like ...?< / b > < br / >
Who knows. I didn't do a lot of research before making this. It was fun making it.
< / p >
< p >
< b > Can I use this in my app? Will it stay free?< / b > < br / >
Yes. As long as you don't abuse it, it'll be available and free of charge. I do not plan on monetizing
the service.
< / p >
< p >
< b > What are the uptime guarantees?< / b > < br / >
Best effort.
< / p >
< p >
< b > Will you know what topics exist, can you spy on me?< / b > < br / >
If you don't trust me or your messages are sensitive, run your own server. It's < a href = "https://github.com/binwiederhier/ntfy" > open source< / a > .
That said, the logs do not contain any topic names or other details about you. Check the code if you don't believe me.
< / p >
< center id = "ironicCenterTagDontFreakOut" > < i > Made with ❤️ by < a href = "https://heckel.io" > Philipp C. Heckel< / a > < / i > < / center >
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