> ## Documentation Index
> Fetch the complete documentation index at: https://developers.hubspot.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Event

> Create a new attention span event in the MediaBridgeService. This endpoint is used to record attention span events, which can be useful for tracking user engagement with media content. The request must include a valid JSON body conforming to the AttentionSpanEventRequest schema.

export const ScopesList = ({scopes = [], description = "This API requires one of the following scopes:"}) => {
  if (!scopes || scopes.length === 0) {
    return null;
  }
  const sortedScopes = scopes.sort((a, b) => a.localeCompare(b));
  return <div>
      <div className="text-sm mb-2">{description}</div>
      <div>
        {sortedScopes.map((scope, index) => <div key={index}>
            <code>
              <span className="text-xs">{scope}</span>
            </code>
          </div>)}
      </div>
    </div>;
};

export const SupportedProducts = ({marketing, sales, service, cms, data, commerce, crm, marketingLevel, salesLevel, serviceLevel, cmsLevel, dataLevel, commerceLevel, crmLevel}) => {
  const translations = {
    description: "Requires one of the following products or higher.",
    productNames: {
      marketing: "Marketing Hub",
      sales: "Sales Hub",
      service: "Service Hub",
      cms: "Content Hub",
      data: "Data Hub",
      commerce: "Revenue Hub",
      crm: "Smart CRM"
    },
    tiers: {
      free: "Free",
      starter: "Starter",
      professional: "Professional",
      enterprise: "Enterprise"
    }
  };
  const translateTier = tier => {
    if (!tier) return '';
    const lowerTier = tier.toLowerCase();
    return translations.tiers[lowerTier] || tier;
  };
  const products = [{
    name: marketing ? translations.productNames.marketing : '',
    level: translateTier(marketingLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/MarketingHub.svg",
    alt: "Marketing Hub"
  }, {
    name: sales ? translations.productNames.sales : '',
    level: translateTier(salesLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/SalesHub.svg",
    alt: "Sales Hub"
  }, {
    name: service ? translations.productNames.service : '',
    level: translateTier(serviceLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/ServiceHub.svg",
    alt: "Service Hub"
  }, {
    name: cms ? translations.productNames.cms : '',
    level: translateTier(cmsLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/ContentHub.svg",
    alt: "Content Hub"
  }, {
    name: data ? translations.productNames.data : '',
    level: translateTier(dataLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/DataHub.svg",
    alt: "Data Hub"
  }, {
    name: commerce ? translations.productNames.commerce : '',
    level: translateTier(commerceLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base/subscription_key_icons/commerce_icon.svg",
    alt: "Revenue Hub"
  }, {
    name: crm ? translations.productNames.crm : '',
    level: translateTier(crmLevel),
    icon: "https://www.hubspot.com/hubfs/Knowledge_Base_2023-24-25/developer/icons/SmartCRM.svg",
    alt: "Smart CRM"
  }].filter(product => product.name && product.level);
  if (products.length === 0) return null;
  return <div>
      <div className="text-sm mb-2">{translations.description}</div>
      <div className={`grid ${products.length === 1 ? 'grid-cols-1' : 'grid-cols-2'} gap-1.5`}>
        {products.map((product, index) => <div key={index} style={{
    display: 'flex',
    alignItems: 'center'
  }}>
            <img src={product.icon} alt={product.alt} className="w-3.5 h-3.5 mr-1.5 mt-2.5 mb-2.5 flex-shrink-0 align-middle" />
            <span className="font-medium mr-1 text-sm">{product.name} -</span>
            <span className="text-sm">{product.level}</span>
          </div>)}
      </div>
    </div>;
};

<AccordionGroup>
  <Accordion title="Supported products" defaultOpen="true" icon="cubes">
    <SupportedProducts marketing={true} sales={true} service={true} cms={true} marketingLevel="FREE" salesLevel="FREE" serviceLevel="FREE" cmsLevel="FREE" />
  </Accordion>

  <Accordion title="Required Scopes" icon="key">
    <ScopesList
      scopes={[
  'media_bridge.write'
]}
    />
  </Accordion>
</AccordionGroup>


## OpenAPI

````yaml specs/2026-09/cms-media-bridge-v2026-09.json POST /media-bridge/2026-09/events/attention-span
openapi: 3.0.1
info:
  title: CMS Media Bridge
  description: Basepom for all HubSpot Projects
  version: 2026-09
  x-hubspot-product-tier-requirements:
    marketing: FREE
    sales: FREE
    service: FREE
    cms: FREE
    commerce: FREE
    crmHub: FREE
    dataHub: FREE
servers:
  - url: https://api.hubapi.com
security: []
tags:
  - name: Advanced
  - name: Basic
  - name: Batch
paths:
  /media-bridge/2026-09/events/attention-span:
    post:
      tags:
        - Advanced
      summary: Create Event
      description: >-
        Create a new attention span event in the MediaBridgeService. This
        endpoint is used to record attention span events, which can be useful
        for tracking user engagement with media content. The request must
        include a valid JSON body conforming to the AttentionSpanEventRequest
        schema.
      operationId: post-/media-bridge/2026-09/events/attention-span
      parameters: []
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AttentionSpanEventRequest'
        required: true
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AttentionSpanEvent'
        default:
          $ref: '#/components/responses/Error'
          description: ''
      security:
        - oauth2:
            - media_bridge.write
components:
  schemas:
    AttentionSpanEventRequest:
      required:
        - mediaType
        - occurredTimestamp
        - rawDataMap
        - sessionId
      type: object
      properties:
        _hsenc:
          type: string
          description: An encoded string used for HubSpot-specific encoding purposes.
        contactId:
          type: integer
          description: The unique identifier for the contact associated with the event.
          format: int64
        contactUtk:
          type: string
          description: The unique tracking key for the contact, used for tracking purposes.
        derivedValues:
          $ref: '#/components/schemas/AttentionSpanCalculatedValues'
        externalId:
          type: string
          description: >-
            An external identifier for the event, typically used to correlate
            with external systems.
        externalPlayContext:
          type: string
          description: >-
            Additional context about the play event, typically used for external
            integrations.
          enum:
            - EMAIL
            - EXTERNAL_PAGE
        mediaBridgeId:
          type: integer
          description: The unique identifier for the media bridge instance.
          format: int64
        mediaName:
          type: string
          description: The name of the media involved in the event.
        mediaType:
          type: string
          description: >-
            The type of media involved in the event. Valid values include
            'VIDEO', 'AUDIO', 'DOCUMENT', 'OTHER', and 'IMAGE'.
          enum:
            - AUDIO
            - DOCUMENT
            - IMAGE
            - OTHER
            - VIDEO
        mediaUrl:
          type: string
          description: The URL of the media involved in the event.
        occurredTimestamp:
          type: integer
          description: >-
            The timestamp when the event occurred, represented as a Unix
            timestamp in milliseconds.
          format: int64
        pageId:
          type: integer
          description: The unique identifier for the page where the event occurred.
          format: int64
        pageName:
          type: string
          description: The name of the page where the event occurred.
        pageUrl:
          type: string
          description: The URL of the page where the event occurred.
        rawDataMap:
          type: object
          additionalProperties:
            type: integer
            format: int32
          description: >-
            A map of raw data key-value pairs providing additional context about
            the event.
        rawDataString:
          type: string
          description: A raw data string containing additional information about the event.
        sessionId:
          type: string
          description: >-
            The unique identifier for the session during which the event
            occurred.
    AttentionSpanEvent:
      required:
        - contactId
        - mediaBridgeId
        - mediaBridgeObjectCoordinates
        - mediaBridgeObjectTypeId
        - mediaName
        - mediaType
        - occurredTimestamp
        - percentRange
        - portalId
        - providerId
        - sessionId
        - totalPercentPlayed
      type: object
      properties:
        contactId:
          type: integer
          description: >-
            A string representing the unique identifier for the contact
            associated with the event.
          format: int64
        externalPlayContext:
          type: string
          description: >-
            A string providing additional context about the play event from an
            external source.
          enum:
            - EMAIL
            - EXTERNAL_PAGE
        mediaBridgeId:
          type: integer
          description: >-
            A string representing the unique identifier for the media bridge
            instance.
          format: int64
        mediaBridgeObjectCoordinates:
          type: string
          description: A string detailing the coordinates of the media bridge object.
        mediaBridgeObjectTypeId:
          type: string
          description: >-
            A string representing the type identifier for the media bridge
            object.
        mediaName:
          type: string
          description: A string representing the name of the media content.
        mediaType:
          type: string
          description: >-
            A string indicating the type of media involved in the event, such as
            'VIDEO', 'AUDIO', etc.
          enum:
            - AUDIO
            - DOCUMENT
            - IMAGE
            - OTHER
            - VIDEO
        mediaUrl:
          type: string
          description: A string containing the URL of the media content.
        occurredTimestamp:
          type: integer
          description: >-
            A string representing the timestamp of when the event occurred, in
            ISO 8601 format.
          format: int64
        pageId:
          type: integer
          description: A string representing the unique identifier for the page.
          format: int64
        pageName:
          type: string
          description: >-
            A string representing the name of the page where the media was
            accessed.
        pageObjectCoordinates:
          type: string
          description: A string detailing the coordinates of the page object.
        pageUrl:
          type: string
          description: >-
            A string containing the URL of the page where the media was
            accessed.
        percentRange:
          type: string
          description: >-
            A string indicating the range of percentages that were played during
            the session.
        portalId:
          type: integer
          description: >-
            An integer representing the unique identifier for the HubSpot
            portal.
          format: int32
        providerId:
          type: integer
          description: A string representing the unique identifier for the media provider.
          format: int32
        rawData:
          type: string
          description: A string containing raw data associated with the event.
        sessionId:
          type: string
          description: >-
            A string representing the unique identifier for the session during
            which the media was played.
        totalPercentPlayed:
          type: number
          description: >-
            A number indicating the total percentage of the media that was
            played.
        totalSecondsPlayed:
          type: integer
          description: A number representing the total seconds of media that were played.
          format: int32
    AttentionSpanCalculatedValues:
      required:
        - totalPercentPlayed
        - totalSecondsPlayed
      type: object
      properties:
        totalPercentPlayed:
          type: number
          description: >-
            The percentage of the media content that was played. This is a
            numerical value indicating how much of the total content was viewed,
            expressed as a percentage.
        totalSecondsPlayed:
          type: integer
          description: >-
            The total duration in seconds that the media content was played.
            This is a numerical value representing the cumulative playtime.
          format: int32
    Error:
      required:
        - category
        - correlationId
        - message
      type: object
      properties:
        category:
          type: string
          description: The error category
        context:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
          description: Context about the error condition
          example: >-
            {invalidPropertyName=[propertyValue], missingScopes=[scope1,
            scope2]}
        correlationId:
          type: string
          description: >-
            A unique identifier for the request. Include this value with any
            error reports or support tickets
          format: uuid
          example: aeb5f871-7f07-4993-9211-075dc63e7cbf
        errors:
          type: array
          description: further information about the error
          items:
            $ref: '#/components/schemas/ErrorDetail'
        links:
          type: object
          additionalProperties:
            type: string
          description: >-
            A map of link names to associated URIs containing documentation
            about the error or recommended remediation steps
        message:
          type: string
          description: >-
            A human readable message describing the error along with remediation
            steps where appropriate
          example: An error occurred
        subCategory:
          type: string
          description: >-
            A specific category that contains more specific detail about the
            error
      description: >-
        Represents an error response returned by the API when an operation
        fails. This component is used in various endpoints to provide detailed
        information about the error encountered.
      example:
        message: Invalid input (details will vary based on the error)
        correlationId: aeb5f871-7f07-4993-9211-075dc63e7cbf
        category: VALIDATION_ERROR
        links:
          knowledge-base: https://www.hubspot.com/products/service/knowledge-base
    ErrorDetail:
      required:
        - message
      type: object
      properties:
        code:
          type: string
          description: The status code associated with the error detail
        context:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
          description: Context about the error condition
          example: '{missingScopes=[scope1, scope2]}'
        in:
          type: string
          description: The name of the field or parameter in which the error was found.
        message:
          type: string
          description: >-
            A human readable message describing the error along with remediation
            steps where appropriate
        subCategory:
          type: string
          description: >-
            A specific category that contains more specific detail about the
            error
      description: >-
        Represents detailed information about an error that occurred in the API.
        This component is used to provide additional context and specifics about
        errors, typically as part of an error response.
  responses:
    Error:
      description: An error occurred.
      content:
        '*/*':
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://app.hubspot.com/oauth/authorize
          tokenUrl: https://api.hubapi.com/oauth/v1/token
          scopes:
            developers-read: ''
            developers-write: ''
            media_bridge.write: ''

````