Square Webhook Tester

Test Square webhooks in real-time — no signup, no tunnels.

Get a free webhook URL in one click, paste it into your Square dashboard, and watch events stream in live. Verify x-square-hmacsha256-signature signatures automatically, replay any request to your local server, and debug payloads with search and filters.

Get a free Square webhook URL Full Square setup guide

Why test Square webhooks with HookSense

Real-time WebSocket stream

Events appear the instant Square sends them. No polling, no refresh button.

HMAC-SHA256 (over notification URL + raw body) verification

Paste your signing secret once — HookSense verifies every Square request automatically.

One-click replay

Send any captured webhook back to your local server or production — rerun your handler without triggering new events.

CLI forwarding, no ngrok

Forward directly to localhost:3000 with npx hooksense listen.

Quick start — 3 steps

1
Get your free webhook URL
Create a free endpoint at hooksense.com. You get a unique URL instantly — no credit card, no config.
2
Paste it into Square
In the Square dashboard, add the URL as your webhook endpoint and pick the events you want (payment.created, payment.updated, etc.).
3
Trigger an event and watch it arrive
Fire a test event from Square — it lands in HookSense within milliseconds. Inspect headers, body, and signature. Replay when ready.

Forward to localhost

npx hooksense listen -p 3000 --path /api/integrations/square

Common Square webhook events

payment.created

payment.updated

refund.created

refund.updated

order.created

order.updated

invoice.payment_made

customer.created

Testing tips specific to Square

Square's signature is computed over the notification URL + raw body — the exact endpoint URL matters
Use a constant-time comparison when verifying signatures to avoid timing attacks
Sandbox and production use separate signature keys — keep them straight in HookSense
Replay captured events to retest your handler without re-running a sandbox payment

Test webhooks from other providers

Start testing Square webhooks now

Free plan includes 100 requests/day, 7-day retention, real-time streaming. No credit card.

Create a free endpoint