Verify Webhook Signature

auth_algostringRequired

The algorithm that PayPal uses to generate the signature and that you can use to verify the signature. Extract this value from the `PAYPAL-AUTH-ALGO` response header, which is received with the webhook notification.

Match^[a-zA-Z0-9]+$Length0 <= length <= 100

cert_urlstringRequired

The X.509 public key certificate. Download the certificate from this URL and use it to verify the signature. Extract this value from the `PAYPAL-CERT-URL` response header, which is received with the webhook notification.

FormaturiLength0 <= length <= 500

transmission_idstringRequired

The ID of the HTTP transmission. Contained in the `PAYPAL-TRANSMISSION-ID` header of the notification message.

Match^(?!\d+$)\w+\S+Length0 <= length <= 50

transmission_sigstringRequired

The PayPal-generated asymmetric signature. Appears in the `PAYPAL-TRANSMISSION-SIG` header of the notification message.

Match^(?!\d+$)\w+\S+Length0 <= length <= 500

transmission_timestringRequired

The date and time of the HTTP transmission, in [Internet date and time format](https://tools.ietf.org/html/rfc3339#section-5.6). Appears in the `PAYPAL-TRANSMISSION-TIME` header of the notification message.

Formatdate-timeLength0 <= length <= 100

webhook_idstringRequired

The ID of the webhook as configured in your Developer Portal account.

Match^[a-zA-Z0-9]+$Length0 <= length <= 50

webhook_eventobject<event>Required

A webhook event notification.

event properties

link_description properties

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Verify Webhook Signature

event properties

link_description properties

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Verify Webhook Signature

event properties

link_description properties

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On this page

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Verify Webhook Signature

event properties

link_description properties

Back to top

On this page