How to send push notifications with Flask
Updated on March 29, 2026
Learn how to send Signalgrid push notifications
Signalgrid makes it straightforward to send notifications from Flask. The platform uses a simple model built around your client_key, a target channel, and a few core fields such as title, body, type, and optional critical.
Flask is useful for small services, internal tools, and scripts that need a straightforward way to trigger notifications from Python.
What you need
- A Signalgrid account
- Your client key
- A channel token
- Flask available in your environment
Basic example
The following example sends a simple notification with Flask.
import os
import requests
from flask import Flask, jsonify
app = Flask(__name__)
@app.post("/notify")
def notify():
response = requests.post(
"https://api.signalgrid.co/v1/push",
data={
"client_key": os.getenv("SIGNALGRID_CLIENT_KEY"),
"channel": os.getenv("SIGNALGRID_CHANNEL"),
"title": "Flask Event",
"body": "A Flask route triggered a notification.",
"type": "INFO",
},
)
return jsonify(response.json())Required fields
Field
Description
client_keyAuthenticates the request on behalf of your Signalgrid user
channelThe channel token that should receive the notification
titleShort notification title
bodyMain notification message
typeVisual notification type such as
INFO, WARN, SUCCESS, or CRITcriticalOptional flag for urgent notifications
Environment variables
Keeping credentials outside your code is usually the better move.
export SIGNALGRID_CLIENT_KEY=your_client_key
export SIGNALGRID_CHANNEL=your_channel_tokenExample: Lightweight Python Services
Flask is useful for small services, internal tools, and scripts that need a straightforward way to trigger notifications from Python.