How webhooks works

Set up your webhooks in less than 1 minute.

Webhooks are automatic notifications essential for system integration, as they notify your server directly, eliminating the need to constantly check the status of an operation. With webhooks, you can:

  • Reduce repetitive API queries to check the status of a document (commonly known as polling);

  • Synchronize systems and integrations, ensuring that information between different platforms is always up to date and consistent;

  • Automate post-event processes so that subsequent tasks are performed automatically.

Do I need to have an API Plan to use webhooks? No, webhooks are freely available to all users. But API users are strongly recommended to use webhooks instead of polling.


ZapSign supports webhooks to notify you of events such as document creation, signature, document rejection, document completion, or email delivery failure. When such an event occurs, we send an HTTP POST request to the URL configured in your application containing details about the event in JSON format.

Your application should return status 200 when receiving a webhook, otherwise, ZapSign will retry the sending, generating duplicates and/or unnecessary requests.

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