Squarespace Webhook Events

asyncapi: 2.6.0
info:
  title: Squarespace Webhook Events
  description: 'The Squarespace webhook system delivers real-time event notifications to registered endpoint
    URLs when commerce activity occurs on a merchant site. Supported events include order creation, order
    updates, and extension uninstalls. Each notification includes a unique identifier, the website ID,
    subscription ID, topic, and a data payload specific to the event type. Notifications are signed using
    HMAC-SHA256 with the subscription secret, enabling receivers to verify authenticity via the Squarespace-Signature
    header.


    Updated 2026-08-13: the six contact.* and address.* topics released 2026-04-15 were added, with payload
    schemas lifted verbatim from Squarespace''s own published OpenAPI contract rather than hand-written.
    Note an inconsistency Squarespace ships in those newer payloads — the subscription identifier is named
    `subscriptionsId` (plural) in the contact and address envelopes, while the documented webhook envelope
    and the older order/extension payloads use `subscriptionId`.'
  version: '1.1'
  contact:
    name: Squarespace Developer Support
    url: https://developers.squarespace.com/webhooks/overview
  termsOfService: https://www.squarespace.com/terms-of-service
  x-generated: '2026-08-13'
  x-method: derived
  x-source: https://developers.squarespace.com/webhooks/overview + openapi/squarespace-commerce-api-v2-openapi.json
externalDocs:
  description: Squarespace Webhooks Documentation
  url: https://developers.squarespace.com/webhooks/overview
servers:
  squarespace:
    url: https://api.squarespace.com
    protocol: https
    description: Squarespace sends webhook notifications as HTTP POST requests from this origin. Receiving
      endpoints must be publicly accessible HTTPS URLs registered via the Webhook Subscriptions API.
    security:
    - hmacSignature: []
channels:
  /webhook:
    description: The endpoint on the subscriber's server that receives webhook notifications from Squarespace.
      Squarespace sends HTTP POST requests with JSON payloads and a Squarespace-Signature header for verification.
    publish:
      operationId: receiveWebhookNotification
      summary: Receive a webhook notification from Squarespace
      description: Squarespace sends this message to the subscriber's registered endpoint URL when a subscribed
        event occurs on the merchant site. The receiver should validate the Squarespace-Signature header
        before processing the payload. Squarespace expects a 2xx response within a short timeout window.
      message:
        oneOf:
        - $ref: '#/components/messages/OrderCreateNotification'
        - $ref: '#/components/messages/OrderUpdateNotification'
        - $ref: '#/components/messages/ExtensionUninstallNotification'
        - $ref: '#/components/messages/ContactCreateNotification'
        - $ref: '#/components/messages/ContactUpdateNotification'
        - $ref: '#/components/messages/ContactDeleteNotification'
        - $ref: '#/components/messages/AddressCreateNotification'
        - $ref: '#/components/messages/AddressUpdateNotification'
        - $ref: '#/components/messages/AddressDeleteNotification'
components:
  securitySchemes:
    hmacSignature:
      type: httpApiKey
      name: Squarespace-Signature
      in: header
      description: HMAC-SHA256 signature generated by signing the raw request body with the webhook subscription
        secret as the key. Recipients must compute the same signature and compare it to the header value
        to verify the notification originated from Squarespace.
  messages:
    OrderCreateNotification:
      name: order.create
      title: Order Create Notification
      summary: Notification sent when a new order is created on the merchant site
      description: Squarespace sends this notification when a customer places a new order on the merchant
        site. The data payload contains the unique order ID. Use the Orders API to retrieve full order
        details using this ID.
      contentType: application/json
      headers:
        type: object
        properties:
          Squarespace-Signature:
            type: string
            description: HMAC-SHA256 signature of the request body using the subscription secret as the
              key. Used to verify notification authenticity.
      payload:
        $ref: '#/components/schemas/OrderCreatePayload'
    OrderUpdateNotification:
      name: order.update
      title: Order Update Notification
      summary: Notification sent when an existing order is updated on the merchant site
      description: Squarespace sends this notification when an order is modified, such as when fulfillment
        status changes or the order is refunded. The data payload contains the order ID and an update
        type description.
      contentType: application/json
      headers:
        type: object
        properties:
          Squarespace-Signature:
            type: string
            description: HMAC-SHA256 signature of the request body using the subscription secret as the
              key. Used to verify notification authenticity.
      payload:
        $ref: '#/components/schemas/OrderUpdatePayload'
    ExtensionUninstallNotification:
      name: extension.uninstall
      title: Extension Uninstall Notification
      summary: Notification sent when a Squarespace Extension is uninstalled from a site
      description: Squarespace sends this notification when a merchant uninstalls a Squarespace Extension.
        Receiving this event should trigger cleanup of any stored data or active resources associated
        with the merchant's site in the extension's backend systems.
      contentType: application/json
      headers:
        type: object
        properties:
          Squarespace-Signature:
            type: string
            description: HMAC-SHA256 signature of the request body using the subscription secret as the
              key. Used to verify notification authenticity.
      payload:
        $ref: '#/components/schemas/ExtensionUninstallPayload'
    ContactCreateNotification:
      name: contact.create
      title: Contact Create Notification
      summary: Notification sent for the contact.create event
      description: Squarespace sends this notification when a contact is created on the merchant site.
        The data payload is the full Contact resource.
      contentType: application/json
      headers: &id001
        type: object
        properties:
          Squarespace-Signature:
            type: string
            description: HMAC-SHA256 signature of the request body using the subscription secret as the
              key. Used to verify notification authenticity.
      payload:
        $ref: '#/components/schemas/ContactCreatePayload'
    ContactUpdateNotification:
      name: contact.update
      title: Contact Update Notification
      summary: Notification sent for the contact.update event
      description: Squarespace sends this notification when a contact is modified. The data payload is
        the full Contact resource after the change.
      contentType: application/json
      headers: *id001
      payload:
        $ref: '#/components/schemas/ContactUpdatePayload'
    ContactDeleteNotification:
      name: contact.delete
      title: Contact Delete Notification
      summary: Notification sent for the contact.delete event
      description: Squarespace sends this notification when a contact is removed. The data payload carries
        only the deleted contact id and deletedOn timestamp.
      contentType: application/json
      headers: *id001
      payload:
        $ref: '#/components/schemas/ContactDeletePayload'
    AddressCreateNotification:
      name: address.create
      title: Address Create Notification
      summary: Notification sent for the address.create event
      description: Squarespace sends this notification when address book entries are added to a contact.
        The data payload carries the contactId and the created entries.
      contentType: application/json
      headers: *id001
      payload:
        $ref: '#/components/schemas/AddressCreatePayload'
    AddressUpdateNotification:
      name: address.update
      title: Address Update Notification
      summary: Notification sent for the address.update event
      description: Squarespace sends this notification when address book entries on a contact change.
        The data payload carries the contactId and the entries after the update.
      contentType: application/json
      headers: *id001
      payload:
        $ref: '#/components/schemas/AddressUpdatePayload'
    AddressDeleteNotification:
      name: address.delete
      title: Address Delete Notification
      summary: Notification sent for the address.delete event
      description: Squarespace sends this notification when address book entries are removed from a contact.
        The data payload carries the contactId and the deleted entry ids.
      contentType: application/json
      headers: *id001
      payload:
        $ref: '#/components/schemas/AddressDeletePayload'
  schemas:
    NotificationBase:
      type: object
      description: Common fields present in all Squarespace webhook notification payloads
      required:
      - notificationId
      - websiteId
      - subscriptionId
      - topic
      - createdOn
      properties:
        notificationId:
          type: string
          description: Unique identifier for this specific notification delivery
        websiteId:
          type: string
          description: Unique identifier of the Squarespace website that triggered the notification
        subscriptionId:
          type: string
          description: Unique identifier of the webhook subscription that received this event
        topic:
          type: string
          description: The event topic that triggered this notification
          enum:
          - order.create
          - order.update
          - extension.uninstall
        createdOn:
          type: string
          format: date-time
          description: ISO 8601 UTC timestamp when the notification was created
    OrderCreatePayload:
      allOf:
      - $ref: '#/components/schemas/NotificationBase'
      - type: object
        description: Payload for an order.create webhook notification
        required:
        - data
        properties:
          topic:
            type: string
            enum:
            - order.create
          data:
            type: object
            description: Data payload for the order create event
            required:
            - orderId
            properties:
              orderId:
                type: string
                description: Unique identifier of the newly created order. Use this ID with the Orders
                  API to retrieve full order details.
    OrderUpdatePayload:
      allOf:
      - $ref: '#/components/schemas/NotificationBase'
      - type: object
        description: Payload for an order.update webhook notification
        required:
        - data
        properties:
          topic:
            type: string
            enum:
            - order.update
          data:
            type: object
            description: Data payload for the order update event
            required:
            - orderId
            properties:
              orderId:
                type: string
                description: Unique identifier of the updated order. Use this ID with the Orders API to
                  retrieve the current order state.
              orderUpdate:
                type: string
                description: A string describing the type of update that was made to the order, such as
                  fulfillment status changes or refunds.
    ExtensionUninstallPayload:
      allOf:
      - $ref: '#/components/schemas/NotificationBase'
      - type: object
        description: Payload for an extension.uninstall webhook notification
        required:
        - data
        properties:
          topic:
            type: string
            enum:
            - extension.uninstall
          data:
            type: object
            description: Data payload for the extension uninstall event
            properties:
              clientId:
                type: string
                description: The client ID of the extension that was uninstalled
    AcceptsMarketing:
      type: object
      properties:
        acceptsMarketing:
          type: boolean
          description: Whether the contact accepts marketing email.
        joinedOn:
          type: string
          description: The date and time the contact was added to the marketing list.The value returned
            in the creation response is a near-real-time estimate; the Get Contact endpoint should be
            used to verify the exact persisted timestamp.
          format: date-time
        leftOn:
          type: string
          description: The date and time the contact left Marketing list
          format: date-time
      description: Marketing subscription state for the contact's email.
    AddressBookEntry:
      type: object
      properties:
        address:
          $ref: '#/components/schemas/ContactAddress'
        defaultShipping:
          type: boolean
          description: Whether this entry is the current default shipping address. When the contact has
            any address book entries, exactly one entry has this value set to true.
        id:
          type: string
          description: The address book entry's ID.
          readOnly: true
          examples:
          - 5f8d0d55b54764421b7156aa
      description: An address book entry for a contact.
    AddressCreateData:
      required:
      - addressBookEntries
      - contactId
      type: object
      properties:
        addressBookEntries:
          type: array
          description: The address book entries that were created.
          items:
            $ref: '#/components/schemas/AddressBookEntry'
        contactId:
          type: string
          description: The contact's ID.
          examples:
          - 64a7e3d2c8f1b95e30a14d2b
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of the address book entries.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
      description: The address data for the created address book entries.
    AddressCreatePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        data:
          $ref: '#/components/schemas/AddressCreateData'
        id:
          type: string
          description: Unique notification id.
          examples:
          - 5c2ba184b63ed3cb411ce2b1
        subscriptionsId:
          type: string
          description: Unique Webhook Subscriptions id.
          examples:
          - 5f3c2155d947844beedda991
        topic:
          type: string
          description: 'Description of the event that triggered the notification.

            * `order.create`        - always value for OrderCreatePayload.topic ref

            * `order.update`        - always value for OrderUpdatePayload.topic

            * `extension.uninstall` - always value for ExtensionUninstallPayload.topic

            * `contact.create`      - always value for ContactCreatePayload.topic

            * `contact.update`      - always value for ContactUpdatePayload.topic

            * `contact.delete`      - always value for ContactDeletePayload.topic

            * `address.create`      - always value for AddressCreatePayload.topic

            * `address.update`      - always value for AddressUpdatePayload.topic

            * `address.delete`      - always value for AddressDeletePayload.topic

            '
          default: address.create
          enum:
          - address.create
          examples:
          - address.create
        websiteId:
          type: string
          description: Squarespace website id that triggered the notification.
          examples:
          - 5f3c3d55ac435e1a051f77b3
    AddressDeleteData:
      required:
      - addressBookEntryIds
      - contactId
      type: object
      properties:
        addressBookEntryIds:
          type: array
          description: The IDs of the deleted address book entries.
          items:
            type: string
            description: The IDs of the deleted address book entries.
        contactId:
          type: string
          description: The contact's ID.
          examples:
          - 64a7e3d2c8f1b95e30a14d2b
        deletedOn:
          type: string
          description: Deletion date and time in UTC (ISO 8601 format) of the address book entries.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
      description: Identifiers and metadata for the deleted address book entries.
    AddressDeletePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        data:
          $ref: '#/components/schemas/AddressDeleteData'
        id:
          type: string
          description: Unique notification id.
          examples:
          - 5c2ba184b63ed3cb411ce2b1
        subscriptionsId:
          type: string
          description: Unique Webhook Subscriptions id.
          examples:
          - 5f3c2155d947844beedda991
        topic:
          type: string
          description: 'Description of the event that triggered the notification.

            * `order.create`        - always value for OrderCreatePayload.topic ref

            * `order.update`        - always value for OrderUpdatePayload.topic

            * `extension.uninstall` - always value for ExtensionUninstallPayload.topic

            * `contact.create`      - always value for ContactCreatePayload.topic

            * `contact.update`      - always value for ContactUpdatePayload.topic

            * `contact.delete`      - always value for ContactDeletePayload.topic

            * `address.create`      - always value for AddressCreatePayload.topic

            * `address.update`      - always value for AddressUpdatePayload.topic

            * `address.delete`      - always value for AddressDeletePayload.topic

            '
          default: address.delete
          enum:
          - address.delete
          examples:
          - address.delete
        websiteId:
          type: string
          description: Squarespace website id that triggered the notification.
          examples:
          - 5f3c3d55ac435e1a051f77b3
    AddressUpdateData:
      required:
      - addressBookEntries
      - contactId
      type: object
      properties:
        addressBookEntries:
          type: array
          description: The address book entries after the update.
          items:
            $ref: '#/components/schemas/AddressBookEntry'
        contactId:
          type: string
          description: The contact's ID.
          examples:
          - 64a7e3d2c8f1b95e30a14d2b
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of the address book entries.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        updatedOn:
          type: string
          description: Last update date and time in UTC (ISO 8601 format) of the address book entries.
          format: date-time
          examples:
          - '2024-02-15T14:30:00Z'
      description: The address data after the update.
    AddressUpdatePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        data:
          $ref: '#/components/schemas/AddressUpdateData'
        id:
          type: string
          description: Unique notification id.
          examples:
          - 5c2ba184b63ed3cb411ce2b1
        subscriptionsId:
          type: string
          description: Unique Webhook Subscriptions id.
          examples:
          - 5f3c2155d947844beedda991
        topic:
          type: string
          description: 'Description of the event that triggered the notification.

            * `order.create`        - always value for OrderCreatePayload.topic ref

            * `order.update`        - always value for OrderUpdatePayload.topic

            * `extension.uninstall` - always value for ExtensionUninstallPayload.topic

            * `contact.create`      - always value for ContactCreatePayload.topic

            * `contact.update`      - always value for ContactUpdatePayload.topic

            * `contact.delete`      - always value for ContactDeletePayload.topic

            * `address.create`      - always value for AddressCreatePayload.topic

            * `address.update`      - always value for AddressUpdatePayload.topic

            * `address.delete`      - always value for AddressDeletePayload.topic

            '
          default: address.update
          enum:
          - address.update
          examples:
          - address.update
        websiteId:
          type: string
          description: Squarespace website id that triggered the notification.
          examples:
          - 5f3c3d55ac435e1a051f77b3
    Contact:
      type: object
      properties:
        createdOn:
          type: string
          description: The date and time when the contact was created.
          format: date-time
          readOnly: true
        defaultShippingAddress:
          $ref: '#/components/schemas/AddressBookEntry'
        firstName:
          type: string
          description: The contact's first name.
        id:
          type: string
          description: The contact's ID.
          readOnly: true
          examples:
          - 64a7e3d2c8f1b95e30a14d2b
        lastName:
          type: string
          description: The contact's last name.
        locale:
          type: string
          description: The contact's locale.
          examples:
          - en-US
        primaryEmail:
          $ref: '#/components/schemas/Email'
      description: A contact.
    ContactAddress:
      required:
      - countryCode
      type: object
      properties:
        city:
          type: string
          description: Address' city
          examples:
          - Springfield
        countryCode:
          type: string
          description: ISO 3166 alpha-2 country code string.
          enum:
          - AF
          - AX
          - AL
          - DZ
          - AS
          - AD
          - AO
          - AI
          - AQ
          - AG
          - AR
          - AM
          - AW
          - AU
          - AT
          - AZ
          - BS
          - BH
          - BD
          - BB
          - BY
          - BE
          - BZ
          - BJ
          - BM
          - BT
          - BO
          - BA
          - BW
          - BV
          - BR
          - IO
          - BN
          - BG
          - BF
          - BI
          - BQ
          - KH
          - CM
          - CA
          - CV
          - KY
          - CF
          - TD
          - CL
          - CN
          - CX
          - CC
          - CO
          - KM
          - CG
          - CD
          - CK
          - CR
          - CI
          - CW
          - HR
          - CU
          - CY
          - CZ
          - DK
          - DJ
          - DM
          - DO
          - EC
          - EG
          - SV
          - GQ
          - ER
          - EE
          - ET
          - FK
          - FO
          - FJ
          - FI
          - FR
          - GF
          - PF
          - TF
          - GA
          - GM
          - GE
          - DE
          - GH
          - GI
          - GR
          - GL
          - GD
          - GP
          - GU
          - GT
          - GG
          - GN
          - GW
          - GY
          - HT
          - HM
          - VA
          - HN
          - HK
          - HU
          - IS
          - IN
          - ID
          - IR
          - IQ
          - IE
          - IM
          - IL
          - IT
          - JM
          - JP
          - JE
          - JO
          - KZ
          - KE
          - KI
          - XK
          - KP
          - KR
          - KW
          - KG
          - LA
          - LV
          - LB
          - LS
          - LR
          - LY
          - LI
          - LT
          - LU
          - MO
          - MF
          - MK
          - MG
          - MW
          - MY
          - MV
          - ML
          - MT
          - MH
          - MQ
          - MR
          - MU
          - YT
          - MX
          - FM
          - MD
          - MC
          - MN
          - ME
          - MS
          - MA
          - MZ
          - MM
          - NA
          - NR
          - NP
          - NL
          - AN
          - NC
          - NZ
          - NI
          - NE
          - NG
          - NU
          - NF
          - MP
          - 'NO'
          - OM
          - PK
          - PW
          - PS
          - PA
          - PG
          - PY
          - PE
          - PH
          - PN
          - PL
          - PT
          - PR
          - QA
          - RE
          - RO
          - RU
          - RW
          - BL
          - SH
          - KN
          - LC
          - PM
          - VC
          - WS
          - SM
          - ST
          - SA
          - SN
          - RS
          - SC
          - SL
          - SG
          - SK
          - SI
          - SB
          - SO
          - SX
          - ZA
          - GS
          - ES
          - LK
          - SD
          - SR
          - SJ
          - SS
          - SZ
          - SY
          - SE
          - CH
          - TW
          - TJ
          - TZ
          - TH
          - TL
          - TG
          - TK
          - TO
          - TT
          - TN
          - TR
          - TM
          - TC
          - TV
          - UG
          - UA
          - AE
          - GB
          - US
          - UM
          - UY
          - UZ
          - VU
          - VE
          - VN
          - VG
          - VI
          - WF
          - EH
          - YE
          - ZM
          - ZW
          examples:
          - US
        firstName:
          type: string
          description: Contact's first name
          examples:
          - John
        lastName:
          type: string
          description: Contact's last name
          examples:
          - Doe
        line1:
          type: string
          description: First line of address
          examples:
          - 100 Main St
        line2:
          type: string
          description: Second line of address
          examples:
          - Apt 1A
        phoneNumber:
          type: string
          description: Contact's phone number
          examples:
          - 215-555-4321
        postalCode:
          type: string
          description: zip/postal code
          examples:
          - '10900'
        region:
          type: string
          description: General region (State, Province, County, etc...)
          examples:
          - IL
      description: Address properties for a contact.
    ContactCreatePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        data:
          $ref: '#/components/schemas/Contact'
        id:
          type: string
          description: Unique notification id.
          examples:
          - 5c2ba184b63ed3cb411ce2b1
        subscriptionsId:
          type: string
          description: Unique Webhook Subscriptions id.
          examples:
          - 5f3c2155d947844beedda991
        topic:
          type: string
          description: 'Description of the event that triggered the notification.

            * `order.create`        - always value for OrderCreatePayload.topic ref

            * `order.update`        - always value for OrderUpdatePayload.topic

            * `extension.uninstall` - always value for ExtensionUninstallPayload.topic

            * `contact.create`      - always value for ContactCreatePayload.topic

            * `contact.update`      - always value for ContactUpdatePayload.topic

            * `contact.delete`      - always value for ContactDeletePayload.topic

            * `address.create`      - always value for AddressCreatePayload.topic

            * `address.update`      - always value for AddressUpdatePayload.topic

            * `address.delete`      - always value for AddressDeletePayload.topic

            '
          default: contact.create
          enum:
          - contact.create
          examples:
          - contact.create
        websiteId:
          type: string
          description: Squarespace website id that triggered the notification.
          examples:
          - 5f3c3d55ac435e1a051f77b3
    ContactDeleteData:
      required:
      - deletedOn
      - id
      type: object
      properties:
        deletedOn:
          type: string
          description: Deletion date and time in UTC (ISO 8601 format) of the contact.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        id:
          type: string
          description: The contact's ID.
          examples:
          - 64a7e3d2c8f1b95e30a14d2b
      description: Identifiers and metadata for the deleted contact.
    ContactDeletePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - '2024-01-28T10:44:00Z'
        data:
          $ref: '#/components/schemas/ContactDeleteData'
        id:
          type: string
          description: Unique notification id.
          examples:
          - 5c2ba184b63ed3cb411ce2b1
        subscriptionsId:
          type: string
          description: Unique Webhook Subscriptions id.
          examples:
          - 5f3c2155d947844beedda991
        topic:
          type: string
          description: 'Description of the event that triggered the notification.

            * `order.create`        - always value for OrderCreatePayload.topic ref

            * `order.update`        - always value for OrderUpdatePayload.topic

            * `extension.uninstall` - always value for ExtensionUninstallPayload.topic

            * `contact.create`      - always value for ContactCreatePayload.topic

            * `contact.update`      - always value for ContactUpdatePayload.topic

            * `contact.delete`      - always value for ContactDeletePayload.topic

            * `address.create`      - always value for AddressCreatePayload.topic

            * `address.update`      - always value for AddressUpdatePayload.topic

            * `address.delete`      - always value for AddressDeletePayload.topic

            '
          default: contact.delete
          enum:
          - contact.delete
          examples:
          - contact.delete
        websiteId:
          type: string
          description: Squarespace website id that triggered the notification.
          examples:
          - 5f3c3d55ac435e1a051f77b3
    ContactUpdatePayload:
      required:
      - createdOn
      - id
      - subscriptionsId
      - topic
      - websiteId
      type: object
      properties:
        createdOn:
          type: string
          description: Creation date and time in UTC (ISO 8601 format) of this message.
          format: date-time
          examples:
          - 

# --- truncated at 32 KB (34 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/squarespace/refs/heads/main/asyncapi/squarespace-webhooks-asyncapi.yml