> ## 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. # Get events by external ID > This endpoint searches the portal for all Marketing Events whose externalEventId matches the value provided in the request. It retrieves the objectId and additional event details for each matching Marketing Event. Since multiple Marketing Events can have the same externalEventId, the endpoint returns all matching results. Note: Marketing Events become searchable by externalEventId a few minutes after creation. > [accordion] Supported products > [accordion] Required Scopes ## OpenAPI ````yaml specs/2026-09/marketing-marketing-events-v2026-09.json GET /marketing/marketing-events/2026-09/{externalEventId}/identifiers openapi: 3.0.1 info: title: Marketing Marketing Events 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: Basic - name: Batch - name: Event Attendees - name: Event Status - name: Identifiers - name: List Associations - name: Participant State - name: Settings - name: Subscriber State Changes paths: /marketing/marketing-events/2026-09/{externalEventId}/identifiers: get: tags: - Identifiers summary: Find Marketing Events by External Event Id description: >- This endpoint searches the portal for all Marketing Events whose externalEventId matches the value provided in the request. It retrieves the objectId and additional event details for each matching Marketing Event. Since multiple Marketing Events can have the same externalEventId, the endpoint returns all matching results. Note: Marketing Events become searchable by externalEventId a few minutes after creation. operationId: >- get-/marketing/marketing-events/2026-09/{externalEventId}/identifiers_searchPortalEvents parameters: - name: externalEventId in: path description: The id of the marketing event in the external event application. required: true style: simple explode: false schema: type: string responses: '200': description: successful operation content: application/json: schema: $ref: >- #/components/schemas/CollectionResponseWithTotalMarketingEventIdentifiersResponse default: $ref: '#/components/responses/Error' description: '' security: - oauth2: - crm.objects.marketing_events.read components: schemas: CollectionResponseWithTotalMarketingEventIdentifiersResponse: required: - results - total type: object properties: paging: $ref: '#/components/schemas/Paging' results: type: array description: >- An array containing the marketing event identifiers. Each item in the array is a MarketingEventIdentifiersResponse object. items: $ref: '#/components/schemas/MarketingEventIdentifiersResponse' total: type: integer description: >- An integer representing the total number of marketing event identifiers. format: int32 Paging: type: object properties: next: $ref: '#/components/schemas/NextPage' prev: $ref: '#/components/schemas/PreviousPage' description: >- Represents the pagination information for navigating through a list of results in the API. It provides details on how to access the previous or next set of results. MarketingEventIdentifiersResponse: required: - externalEventId - marketingEventName - objectId type: object properties: appInfo: $ref: '#/components/schemas/AppInfo' externalAccountId: type: string description: >- The accountId that is associated with this marketing event in the external event application externalEventId: type: string description: >- The ID that is associated with this marketing event in the external event application marketingEventName: type: string description: The name of the marketing event objectId: type: string description: The internal ID of the marketing event in HubSpot CRM 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 NextPage: required: - after type: object properties: after: type: string description: The ID element at the start of the page link: type: string description: Link to the next page description: >- Specifies the paging information needed to retrieve the next set of results in a paginated API response PreviousPage: required: - before type: object properties: before: type: string description: >- A string that serves as a cursor indicating the position before the first item in the current set of results, used to fetch the previous set of results. link: type: string description: A string containing the URL link to the previous page of results. description: >- specifies the paging information needed to retrieve the previous set of results in a paginated API response AppInfo: required: - id - name type: object properties: id: type: string description: The ID of the application name: type: string description: The name of the application 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: crm.objects.marketing_events.read: '' crm.objects.marketing_events.write: '' ````