SvelteKit Form Action Email Verification Guide

Add real-time email verification and disposable-email blocking to SvelteKit Form Action with the VeriShield Edge API. The snippet below gates a signup and returns the canonical email identity.

Language

TypeScript

Ecosystem

Vite / Svelte

Latency

< 85ms

Install

Shell

npm create svelte@latest

Verification code

TypeScript

import { fail } from '@sveltejs/kit';
import { RAPIDAPI_KEY } from '$env/static/private';

export const actions = {
  signup: async ({ request }) => {
    const form = await request.formData();
    const email = String(form.get('email'));
    const res = await fetch('https://verishield-edge-api.p.rapidapi.com/v1/verify', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', 'X-RapidAPI-Key': RAPIDAPI_KEY },
      body: JSON.stringify({ email })
    });
    const report = await res.json();
    if (report.fraud_risk.recommendation === 'BLOCK') return fail(403, { error: 'Blocked' });
    return { canonicalEmail: report.canonical_email };
  }
};

What this protects against

Disposable and temporary inboxes, Gmail dot-trick and plus-alias multi-accounting, high-entropy bot usernames, and freshly registered fraud domains. The API returns a 0-100 fraud score with an ALLOW, CHALLENGE_2FA or BLOCK recommendation.

Related Domain Reports