Astro

// src/pages/api/signup.ts
import type { APIRoute } from 'astro';

export const POST: APIRoute = async ({ request }) => {
  const { email } = await request.json();

  try {
    const r = await fetch(
      `https://api.disposableguard.com/v1/check?email=${encodeURIComponent(email)}`,
      { headers: { Authorization: `Bearer ${import.meta.env.DG_KEY}` } }
    );
    if (r.ok) {
      const data = await r.json();
      if (data.is_disposable) {
        return new Response(
          JSON.stringify({ error: 'Please use a real email address.' }),
          { status: 400 }
        );
      }
    }
  } catch {
    // fail-open
  }

  // ...signup logic
  return new Response(JSON.stringify({ ok: true }));
};