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

api.open-notifier.io/api/v1/notifications

-H "X-Api-Key: onk_••••••••••••••••••••"

-H "Content-Type: application/json"

-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.

No credit cardInstant keyFree forever on push

POST /api/v1/auth/signup

"accessToken": "eyJhbGci..."

"apiKey": "onk_••••••••••••••"

Connect where you want to receive

Download the mobile app for push notifications. Connect Telegram or WhatsApp to receive there too — all free.

PushInstall app, sign in

TelegramConnect your account

WhatsAppEnter your number

Give your agent the URL

Paste your MCP URL into Claude Desktop, Cursor, or Windsurf. Or call the REST API from any script or CI job.

Claude DesktopCursorWindsurfAny REST client

// mcp_config.json

"open-notifier": {

"type": "sse",

"url": "https://mcp.open-notifier.io

/mcp?api_key=onk_••••"

}

Get notified — instantly

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

< 200ms deliveryPush · TG · WA90-day history

// response

"success": true

"status": "QUEUED"

"id": "019daa59..."

// 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

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

Personal · Rich text · Instant

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

Your agents work.You stay informed.