Integrate Magic Link with Resend

The complete guide to connecting Magic Link and Resend in Next.js 15.

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Magic Link + Resend
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Secure Webhook & API Handlers (with error logging).

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Technical Proof & Alternatives

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AI Architecture Guide

This technical blueprint outlines a robust integration between Next.js 15 (App Router), Supabase (PostgreSQL), and Upstash (Redis) for a high-performance, edge-compatible architecture. It leverages Server Actions for secure data mutations, Upstash for global rate limiting, and Supabase for persistent storage, specifically optimized for the React 19 / Next.js 15 'use cache' and 'use server' paradigms.

lib/integration.ts

1import { createClient } from '@supabase/supabase-js';
2import { Redis } from '@upstash/redis';
3import { revalidatePath } from 'next/cache';
4
5// 2026-ready TypeScript configuration
6const supabase = createClient(
7  process.env.NEXT_PUBLIC_SUPABASE_URL!,
8  process.env.SUPABASE_SERVICE_ROLE_KEY!
9);
10
11const redis = new Redis({
12  url: process.env.UPSTASH_REDIS_REST_URL!,
13  token: process.env.UPSTASH_REDIS_REST_TOKEN!,
14});
15
16export async function registerEventAction(formData: FormData) {
17  'use server';
18  
19  const userId = formData.get('userId') as string;
20  const eventId = formData.get('eventId') as string;
21
22  // Atomic Rate Limiting via Redis
23  const limitKey = `ratelimit:${userId}`;
24  const currentRequestCount = await redis.incr(limitKey);
25  if (currentRequestCount === 1) await redis.expire(limitKey, 60);
26  if (currentRequestCount > 5) throw new Error('Rate limit exceeded');
27
28  // Transactional Persistence via Supabase
29  const { data, error } = await supabase
30    .from('registrations')
31    .insert([{ user_id: userId, event_id: eventId }])
32    .select();
33
34  if (error) throw new Error(`Database error: ${error.message}`);
35
36  revalidatePath('/events/[id]', 'page');
37  return { success: true, data };
38}

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