How to Receive SendGrid Webhooks in Laravel

Exclude webhook routes from CSRF + use getContent for raw bytes

Laravel is the dominant PHP framework for SaaS development in 2026. Out of the box, the VerifyCsrfToken middleware blocks any POST without a token — including webhooks. The fix is to exclude the webhook URI from CSRF and read $request->getContent() for the raw bytes that HMAC verification needs. This guide walks through the Laravel setup for SendGrid webhooks end to end: capturing the raw body, verifying the signature, handling retries idempotently, and iterating locally without redeploying. Cross-reference the SendGrid Webhooks overview for the event catalog and sample payload.

1. Set Up the Laravel Endpoint

The endpoint needs to do three things, in this order: read the raw body, verify the signature against those exact bytes, and only then parse the JSON for your business logic.

// app/Http/Middleware/VerifyCsrfToken.php — exclude webhook URIs
class VerifyCsrfToken extends Middleware
{
    protected $except = ['webhooks/*'];
}

// routes/web.php (or routes/api.php)
Route::post('/webhooks/{service}', [WebhookController::class, 'receive']);

// app/Http/Controllers/WebhookController.php
namespace App\Http\Controllers;

use Illuminate\Http\Request;

class WebhookController extends Controller
{
    public function receive(Request $request, string $service)
    {
        // IMPORTANT: getContent() returns the raw body BEFORE parsing.
        $rawBody = $request->getContent();
        $signature = $request->header('X-Signature-Header');

        // 1. Verify HMAC over $rawBody
        // 2. Parse JSON only after verification passes
        // 3. Process the event idempotently (use the event id as your key)

        $event = json_decode($rawBody, true);
        logger()->info('Verified webhook', ['type' => $event['type'] ?? null]);

        return response('ok', 200);
    }
}

2. Verify the SendGrid Signature

PHP verification

// composer require sendgrid/eventwebhook
use SendGrid\EventWebhook\EventWebhook;

class WebhookController extends Controller
{
    public function sendgrid(Request $request)
    {
        $payload = $request->getContent();
        $signature = $request->header('X-Twilio-Email-Event-Webhook-Signature', '');
        $timestamp = $request->header('X-Twilio-Email-Event-Webhook-Timestamp', '');

        $ew = new EventWebhook();
        $publicKey = $ew->convertPublicKeyToECDSA(
            env('SENDGRID_WEBHOOK_PUBLIC_KEY'),
        );
        if (!$ew->verifySignature($publicKey, $payload, $signature, $timestamp)) {
            abort(403);
        }
        $events = json_decode($payload, true);
        return response()->json([
            'ok' => true,
            'count' => count($events),
        ]);
    }
}

Wire this verification call into the Laravel handler from section 1. The pattern is identical across Laravel versions: read raw body, verify, parse JSON, dispatch.

See SendGrid's official signing docs for the canonical reference, or the cross-service signature verification guide for the same pattern in Ruby and other languages.

3. Make the Handler Idempotent

SendGrid can — and will — send the same event twice. Network blips, your server returning a 5xx mid-processing, deploy windows: any of these triggers a retry, and your handler will see the same event id again. Build for that on day one rather than chasing duplicate-charge bugs in production.

The simplest pattern is a unique constraint on the event id in your database. The handler does the work inside a transaction, and the insert into the events table is the last step — if a retry arrives, the unique-constraint violation tells you the event already committed and you can return 200 without re-running the side effects.

4. SendGrid Retry Behaviour

Combine the retry numbers above with the idempotency pattern in section 3: aim to acknowledge fast (return 200 under the timeout) and let the idempotency table absorb any duplicates from in-flight retries. The full pattern, including dead-letter queues and replay-from-capture, lives in the Webhook Retry Strategies guide.

5. Test Locally Without Deploying

The fastest iteration loop for any webhook handler is: capture a real SendGrid event with HookRay, then replay that captured request against your local Laravel server until the verification + business logic both pass. No need to retrigger the event in SendGrid, no need to redeploy.

1. Get a free webhook URL at hookray.com — no signup.
2. Paste the URL into your SendGriddashboard's webhook settings.
3. Trigger a test event. HookRay shows the headers, raw body, and parsed payload in real time.
4. Use HookRay's replay feature to send the captured request against http://localhost:3000/api/webhooks/sendgrid (or wherever your Laravel app is listening) — iterate on your code without re-poking the SendGrid dashboard.

Deploying the Laravel Handler

Laravel runs comfortably on Forge/Vapor, traditional VPS (Render, DigitalOcean App Platform), and Docker containers. Octane (Swoole / RoadRunner) keeps boot warm for webhook traffic — at scale, an Octane worker handles incoming webhooks several times faster than per-request PHP-FPM. For low volume, classic LAMP / PHP-FPM is fine.

Need a host that boots quickly enough to absorb webhook bursts? DigitalOcean droplets stay warm, support raw-body proxies cleanly, and avoid the cold-start traps of some serverless runtimes.