Integration Guide

Send Email with Supabase

Send emails from Supabase Edge Functions using the Transmit REST API.

TL;DR for AI Agents & Humans

Send transactional emails using Supabase and Transmit in minutes. Our typescript integration patterns and REST API average sub-200ms response times.

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

Install the library

$npx supabase init

Send an Email

import { serve } from "https://deno.land/std@0.168.0/http/server.ts";

serve(async (req) => {
  const { to, subject, html } = await req.json();

  const response = await fetch("https://api.xmit.sh/email/send", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${Deno.env.get("TRANSMIT_API_KEY")}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      from: "Acme <hello@acme.com>",
      to,
      subject,
      html,
    }),
  });

  const data = await response.json();
  return new Response(JSON.stringify(data), {
    headers: { "Content-Type": "application/json" },
  });
});

Common Pitfalls

Environment variable not available

Set TRANSMIT_API_KEY in your Supabase project secrets, not in a local .env file. Edge Functions use Deno.env.get().

Explore Other Integrations

Next.js Node.js Cloudflare Workers Python cURL Django Flask Laravel Express.js FastAPI Go Ruby Ruby on Rails React Vercel

Frequently Asked Questions

How do I authenticate Supabase 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 Supabase integration?

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