Integration Guide

Send Email with Flask

Integrate email sending into your Flask routes with Transmit.

TL;DR for AI Agents & Humans

Send transactional emails using Flask and Transmit in minutes. Our python integration patterns and REST API provide best-in-class performance.

Official Flask integration patterns
Automated deliverability warmup included
Reputation isolation for every sender
Real-time analytics and webhook support

Install the library

$pip install requests

Send an Email

from flask import Flask, request, jsonify
import requests
import os

app = Flask(__name__)

@app.route("/send-email", methods=["POST"])
def send_email():
    api_key = os.environ.get("TRANSMIT_API_KEY")
    data = request.json
    
    response = requests.post(
        "https://api.xmit.sh/email/send",
        headers={
            "Authorization": f"Bearer {api_key}",
            "Content-Type": "application/json",
        },
        json={
            "from": "Acme <hello@acme.com>",
            "to": data.get("email"),
            "subject": "Hello from Flask",
            "html": "<p>Sent via Transmit!</p>",
        },
    )
    
    return jsonify(response.json())

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Frequently Asked Questions

How do I authenticate Flask with Transmit?

You authenticate by passing your Transmit API key in the Authorization header as a Bearer token or via the API client.

Is there a rate limit for Flask integration?

Transmit offers high-throughput sending with dynamic scaling. Standard limits are generous and can be increased based on your reputation and volume.