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Webhooks and API access are available to Enterprise customers. Using webhooks as a Developer? Apply to become a certified Developer. For consultation on how to best use webhooks and the NationBuilder API, please email [email protected].

Webhooks Overview

Webhooks provide a way for NationBuilder to inform your application or service about certain events as they occur within your nation. To accept a webhook, you need to set up a web server that can receive HTTP POST connections from NationBuilder, and to register your endpoint URL within your nation settings. Whenever an event occurs, NationBuilder will send an appropriate payload to your endpoint.

You can use this, for example, to synchronize external representations of resources with events that happen in NationBuilder.

This is the list of webhook events that NationBuilder supports:

  • People
    • Person created
    • Person changed
    • Person contacted
    • Person merged
  • Donations
    • Donation succeeded
    • Donation changed
    • Donation canceled

In order to determine whether to trust a request your server receives, you can attach a shared secret token to your nation which will be attached to the payload via the key token. For this to be effective, make sure that your webhook recipient application uses HTTPS to communicate.


All webhooks are associated with a payload version. When you register your webhook, you will be associating it with the then-current payload version. A version guarantees that fields in the payload will not be removed, nor will their format or meaning be changed. Fields may, however, be added from time to time.

If at any point in time NationBuilder must change the meaning or format of a field, or remove it from the payload, we will increment the version number for newly-created webhooks, while continuing to send the older data to existing webhooks. If you would like to upgrade to the latest version, edit the webhook and increment the payload version.


Nations with subnations can register webhooks that will be triggered only by events that happen in their subnations. These requests will be accompanied by the webhook token belonging to the parent nation.

Testing webhooks

Feel free to check out our guide on how to test webhooks using ngrok here.

Custom Fields

If custom fields are set for your nation they will be included in the POST request body along with the other person or donation fields.


If, for example, your nation happened to care about the height of a person and you registered a custom field 'height' then it would be visible in the POST request body which gets sent to the URI defined for your registered webhook:

  "token": "sharedsecret",
  "payload": {
    "signup": {
      "nationbuilder_id": 85462,
      "first_name": "John",
      "last_name": "Doe",
      "full_name": "John Doe",
      "email1": "[email protected]",


      "height": 72

Usage pattern

fire_webhooks flag is default set to "true" for all API requests. Setting to "false" will disable the firing of any webhooks that could result from that API request. Example: POST: