PayPal沙箱环境「Invoicing invoice paid」Webhook无事件触发问题咨询

Key Checks for Missing Events #

• Double-check that you explicitly selected the Invoicing invoice paid event when configuring your webhook. It’s common to miss this if you only selected a general group of events instead of the specific one for paid invoices.
• Confirm the sandbox payment was fully completed. Creating an invoice isn’t enough—you need to use a sandbox payer account to go through the entire payment flow, and verify the invoice status shows as "Paid" in your sandbox dashboard.
• Ensure your receive URL is publicly accessible over HTTPS. PayPal doesn’t send webhooks to HTTP endpoints, even in sandbox. Test the endpoint with curl to confirm it returns a 200 OK response within 3 seconds:

  curl -X POST https://your-webhook-endpoint.com -d '{"test_payload": "sample"}'
  

• Verify the webhook is linked to the correct sandbox application. If you have multiple apps in your PayPal sandbox, it’s possible the webhook was attached to a different one than the one generating your invoices.
• Check the webhook event log filters. Make sure you’re viewing the correct time range and have selected the Invoicing invoice paid event type—default filters might hide the events you’re looking for.
• Rule out IPN confusion. If you’re also using Instant Payment Notification (IPN), don’t mix it up with webhooks; the two systems are separate, and invoice paid events won’t come through IPN unless you specifically configured it.

Secondary Checks #

• Ensure your sandbox merchant account has full permissions to send invoice events. Incomplete sandbox account setup can block event delivery.
• Confirm your endpoint is set up to handle PayPal’s signature verification. If your endpoint rejects requests due to invalid signatures, PayPal won’t log the event and will stop retrying after a few attempts.

内容的提问来源于stack exchange，提问作者SwordOfSouls