diff --git a/server/src/routes/webhook-sms.ts b/server/src/routes/webhook-sms.ts
index 3a4e718..2161cee 100644
--- a/server/src/routes/webhook-sms.ts
+++ b/server/src/routes/webhook-sms.ts
@@ -54,6 +54,24 @@ export function createWebhookSmsRouter(deps: WebhookSmsRouterDeps): Router {
     // Respond quickly — Vonage expects a 200 within a few seconds
     res.status(200).json({ status: 'received' });
 
+    const body = (req.body ?? {}) as Record<string, unknown>;
+    const rawText = typeof body.text === 'string' ? body.text : '';
+    logger.info(
+      {
+        event: 'sms.webhook_inbound_payload',
+        contentType: req.headers['content-type'],
+        bodyKeys: Object.keys(body),
+        bodyRedacted: {
+          ...body,
+          from: typeof body.from === 'string' ? maskPhone(body.from) : body.from,
+          to: typeof body.to === 'string' ? maskPhone(body.to) : body.to,
+          msisdn: typeof body.msisdn === 'string' ? maskPhone(body.msisdn) : body.msisdn,
+          text: rawText ? `${rawText.slice(0, 80)}${rawText.length > 80 ? '…' : ''}` : body.text,
+        },
+      },
+      'Inbound webhook payload (redacted)'
+    );
+
     // Process async
     handleInbound(req.body, deps).catch(err => {
       logger.error({ event: 'sms.handler_error', error: (err as Error).message }, 'SMS handler error');