Webhooks are used to notify your application any time an event happens on your account. An example would be a notification triggered after a customer is created. You can register a webhook endpoint through your admin dashboard. We will notify this URL any time an event happens in your account. When the event occurs, an event object is created which contains all the relevant information about what happened, including the type of the event and the data related to that event.


You can register to a webhook URL from the platform settings page, as shown below. You can either subscribe to all events or specific events you want to subscribe to. Note that you can also subscribe to webhooks via our API.


When registering the URL, it must respond with HTTP 200 status code to the POST requests in order to pass the initial validation. Once you register a webhook URL with Pelcro, we will issue an HTTP POST request to the URL specified every time that event occurs.

Structure of a Webhook

The webhook contains a payload formatted as JSON and the applicable HTTP headers. Webhook data is sent as JSON in the POST request body which will contain the data relevant to the event that triggered the request.

Below you can find a sample payload that will be sent to the webhook endpoint:

  • Request

    • Headers

        X-Pelcro-Hmac-SHA256: pdvcCMQA5298lNhqp7i52StRjHEKgY7Z77yU+f+lfGQ=
    • Body

            "type": "subscription.created",
            "id": "evt_ybR5i5QwSVvoWy28ndD4q6hA",
            "created": 1542034347,
            "data": [
                            "object": "subscription",
                            "id": 6807,
                            "user_id": 40864,
                            "plan_id": 386,
                            "cancel_at_period_end": null,
                            "canceled_at": null,
                            "current_period_end": null,
                            "current_period_start": null                                

Webhook Signatures

Pelcro signs the webhook events it sends to the specified endpoints.

We do so by including a signature in each event’s X-Pelcro-Hmac-SHA256 header. This allows you to validate that the events were sent by Pelcro, not by a third party. Pelcro generates signatures using a hash-based message authentication code (HMAC) with SHA-256.

To verify the signature, you need to:

Step 1: Extract the signature from the header.

The signature can be extracted from the X-Pelcro-Hmac-SHA256 header. Please note that the signature is encoded with MIME base64.

Step 2: Determine the expected signature.

To achieve this you need to compute an HMAC with the SHA256 hash function. Use the endpoint’s signing secret as the key, and use the JSON payload (the request’s body) as the message.

This is a PHP example for the step 2:
base64_encode(hash_hmac('sha256', JSON_PAYLOAD , THE_WEBHOOK_SECRET, true))

Step 3: Compare signatures.

You can compare the generated signature with the signature extracted from the request header.

Step 4: Responding to a webhook

To acknowledge receipt of a webhook, your endpoint should return a 2xx HTTP status code. All response codes outside this range, including 3xx codes, will indicate to Pelcro that you did not receive the webhook. Pelcro will retry the request 5 times in the case of failure.

Webhook Notifications

Below is a list of all notifications we currently send to your configured webhook endpoint. Select a notification to see an example of the excepted JSON payload. Please note that we may change, delete, or add more at any time. While developing and maintaining your code, keep an eye on the changelog.




When a new address record is created and added to an end user's account information.


When an existing address record has been updated or modified on an end user's account information.


When an end-user's credit card has failed upon submitting a charge. This could be due to insufficient funds on the card or an expired card.


When an end-user's credit card has been credited with a refund via the Pelcro Platform.


When an end-user's credit card has been successfully charged.


When an end-user registers via the Pelcro Platform, and a user record has been created with a unique email address, password and customer ID associated to it.


When an end-user's information gets updated or modified via the Pelcro Platform (e.g. first or last name, company, or title information).


When an end-user requests a password reset. This will contain the Password reset token which can be used to reset the password.


When a customer successfully updates their password.


When a customer creates a new account and they are requested to verify their email.


When a customer successfully verifies their email.


When a customer requests to login via Passwordless Login


When an invoice is created. (e.g. when a subscription is created, when a new future phase starts or when the billing cycle changes on a subscription).


When an invoice payment attempt fails. This could be due to a declined payment or lack of a stored payment method.


When an invoice payment attempt succeeds.


When an invoice is updated.


When a member activates their membership under a certain subscription that they have been invited to.


When a member is invited to be a member under a subscription.


When a newsletter record gets created for an end-user on the Pelcro Platform.


When a newsletter record gets updated for an end-user on the Pelcro Platform.


When a new e-commerce order gets created for the end-user on the Pelcro Platform or the SDK.


When an end-user's card expires. This event can be used to inform the client that their Payment source expired and that they need to update it.


When an end-user's payment source or card is created or added to the Pelcro Platform.


Thirty days before an end-user's card or payment source expires.


When an end-user's payment source or card is updated on the Pelcro Platform.


When an end-user cancels a subscription.


When an end-user creates a new subscription.


When a subscription expires. This notification is controlled by the expiry date on the end-user's subscription.


When a subscription renews, and a new phase is added to the subscription.


Three days before a subscription's trial period is scheduled to end, or when a trial is ended immediately.


When a subscription is updated, or transitions from one status to another (e.g. a subscription gets renewed, a subscription is updated from the platform, a change in the subscription billing cycle)

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