AI-first · MCP-native · Multi-channel

Your agents work.
You stay informed.

Give Claude, your scripts, or any automation one URL. They notify you instantly — push, Telegram, WhatsApp. No dashboard-watching. No missed events.

Start free — no card needed See how it works ↓

Built for developers, AI builders & indie hackers

terminal — bash

# Claude just finished your code review

$curl -X POST \

https://open-notifier.io/api/v1/notifications \

-H "X-Api-Key: onk_7f3k..." \

-d '{"title":"Review done","body":"3 issues"}'

# response

{

"success": true,

"status": "QUEUED",

"id": "019daa59-edf4-7481..."

}

# delivered to your phone, Telegram & WhatsApp

$ ▋

<200ms

Avg delivery

Push · TG · WA

Channels

~2 min

Setup time

Sign up & get your API key

Create a free account. One API key is generated immediately — no card, no setup wizard, no waiting.

POST /auth/signup
→ { accessToken, apiKey: "onk_..." }

Connect where you want to receive

Download the mobile app for push notifications (free). Upgrade to Pro to also receive on your personal Telegram and WhatsApp.

Push  → install app, sign in
TG    → connect your account  [Pro]
WA    → enter your number     [Pro]

Give your agent the URL

Paste your MCP URL into Claude Desktop, Cursor, or any MCP-compatible agent. Or use the REST API from any script.

# MCP config (Claude Desktop)
"url": "https://mcp.open-notifier.io
         /mcp?api_key=onk_..."

Get notified — instantly

Your agent calls send_notification. Notification queues immediately, delivers in under 200ms. You know — without checking anything.

{ "success": true,
  "status": "QUEUED",
  "id": "019d..." }

// what you get

Everything your
notifications need.

Built from scratch for the world where AI agents do work on your behalf and need to reach you.

Push Notifications

Free

Firebase-backed push to any device. Download the app, sign in, and notifications start arriving — even when the screen is off.

Android · iOS · Background delivery

Deploy succeeded

v2.4.1 is live on production

just now

ML training done

Accuracy: 94.2% — model saved

2m ago

New signup

ravi@example.com joined via API

5m ago

Pro

Notifications land in your DMs. High open rates, instant delivery, rich formatting.

Personal · Rich text · Instant

Pro

Send to your personal number. Reach yourself where you're most reachable.

Phone number · Global reach

MCP Native

Paste one URL into Claude Desktop, Cursor, or any MCP-compatible agent. Your agent notifies you the same way it calls any other tool.

Claude Desktop · Cursor · Windsurf

REST API

One POST request from any script, cron job, CI pipeline, or webhook. No SDK required. Works in bash, Python, Go.

curl-friendly · API key auth

Reliable Queue

BullMQ on Valkey with automatic retries, exponential backoff, and a dead letter queue. Notifications don't get lost.

5× retry · Circuit breaker · DLQ

// use cases

Anything async.
Any event.

If something happens while you're not watching, Open Notifier makes sure you find out.

See all use cases

AI Agents

→Task completion alerts
→Decision checkpoints
→Error notifications
→Daily summaries

DevOps & CI/CD

→Build pass/fail
→Deploy notifications
→Server health alerts
→Cron job failures

Business Events

→New signup
→Payment received
→Churn alert
→Support escalation

Data & Scripts

→Pipeline complete
→ML training done
→Scraping finished
→Report ready

// pricing

Start free.
Pay for channels.

Push notifications are always free. Upgrade when you want Telegram and WhatsApp.

Free

$0/forever

Push your way in — no card, no commitment.

Push notifications (unlimited)
1 API key
MCP integration
90-day history
Community support

Get started free

Pro

Your agents work.You stay informed.