Self-hosted
Your server, your data.
$0forever
- Run the server on a Raspberry Pi, a VPS, a NAS or an old Android phone
- Every feature, unlimited messages and agents
- The iOS and Android apps
- Push relay for iPhone included, fair use
The inbox for your scripts and AI agents
Anything that can make an HTTP request can send you a card, ask you a question, show live progress or ring your phone. You answer with a tap, and your code gets the answer back.
Think Pushover, built for agents. Run it on your own server or just use the app.
Apps for iOS and Android are in development. Today Hark runs on any Android phone through Termux.
deploy.sh
ready
9:41
Hark
FeedThreadsAlarms
✎
NoteNote, or / for commands
- 1Your code sends a request
One HTTP call from a script, a cron job, CI or an agent. No SDK needed.
- 2Hark delivers it to your phone
A rich card in your inbox and a notification with buttons you can tap.
- 3Your answer goes straight back
Your code is waiting. It gets your choice, form values or text as plain JSON.
What your scripts and agents can do with Hark
Pick one. Every example below is live: tap, hold and type in the card, and see the exact code your script would run.
Your script receiveswaiting
Uses Hark's Python client, a single file with no dependencies. Every call is also plain HTTP.
One small API, any language
Hark is a plain HTTP server. If your tool can run curl, it can talk to your phone.
- Wait for the answer, however you like
- Block on a long-poll with
?wait=600, get a webhook, or watch the live event stream. - Signed webhooks with delivery receipts
- Every callback carries an HMAC-SHA256 signature and is retried if your server is down. The card shows whether your agent actually got the answer.
- Update, pin and dismiss from code
- Edit a card in place, pin it to the board, mark it seen, dismiss it or delete it.
- A live stream your own app can use
- The Hark app runs on the same server-sent event stream that you can subscribe to.
- Clients and a CLI
- A single-file Python client, PowerShell helpers, and a
harkcommand for shell scripts.
On the roadmap
An MCP server so Claude Code and other agents can ask you questions directly, scheduled jobs and monitors, and native iOS and Android apps.
How Hark is different from Pushover and ntfy
Both are good at sending a notification to your phone. Hark is built for the other direction too: your code asking you things and waiting for the answer.
| Pushover | ntfy | Hark | |
|---|---|---|---|
| Send a notification from a script | Yes | Yes | Yes |
| Self-host it | No | Yes | Yes |
| Questions, forms and free text your code waits on | Acknowledge only | Action buttons | Yes |
| Live cards that update in place | No | Partial | Yes |
| Threads and chat with each agent | No | No | Yes |
| Alarms and timers your code can set | No | No | Yes |
| Native iOS and Android apps | Yes | Yes | In development |
Based on each project's public documentation, October 2026.
Free to self-host. Pay only if you want us to run it.
The server, the apps and every feature are free if you host it yourself. Cloud is for people who would rather not.
Cloud
Best for most peopleWe run it. You just send.
$4per month
Billed $48 once a year
- Nothing to install, patch or keep online
- 25,000 messages a month
- Unlimited agents and devices
- 90 days of history and search
- Everything in Self-hosted
Team
Later this yearFor people who approve things together.
$12per user, per month
- Everything in Cloud
- Shared agents and inboxes
- Send approvals to a person or a group
- An audit log of every question and answer
- Priority support
Prefer to pay once, like Pushover?
The first 500 founding members get Cloud for life for $99, one time.
Questions
Get early access
Join the list for the iOS and Android apps and the hosted version. We'll email you when your invite is ready.
Already comfortable with Termux on Android? Say so in your reply and we'll send you the early build.