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Payment Webhook Simulator

Simulate payment callbacks from Alipay, WeChat Pay, and Stripe. Fill in parameters, generate a signed POST request, and send it to your webhook URL for testing.

Webhook URL

Callback Parameters

Out Trade No

Trade No (Platform)

Amount (CNY)

Subject

Status

Secret Key (for signing)

Generated cURL Command

curl -X POST "https://your-domain.com/api/payment/webhook" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d 'out_trade_no=OUT20260617T9KK9K&total_amount=99.99&subject=VIP%20Membership&trade_no=T202606177Q92LV&trade_status=TRADE_SUCCESS&timestamp=2026-06-17T13%3A41%3A18.132Z&sign_type=HMAC-SHA256&sign=%5Bcalculated%20using%20HMAC%20Generator%5D'

Replace the URL with your actual webhook endpoint

This tool generates sample payment callback payloads for testing. Verify signatures with HMAC Signature Generator.

The send test feature sends the generated payload to your endpoint. For localhost endpoints, use a tunnel service.

Payment Webhook Simulator - CodeTools Toolbox - Free online developer tools.