> ## Documentation Index > Fetch the complete documentation index at: https://docs.tracecat.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Workflow Execution Collection Page > Fetch a bounded page of collection item descriptors. ## OpenAPI ````yaml https://platform.tracecat.com/api/openapi.json post /workspaces/{workspace_id}/workflow-executions/{execution_id}/objects/collection/page openapi: 3.1.0 info: title: Tracecat API summary: Tracecat API description: The open source AI automation platform for security teams and agents. termsOfService: >- https://docs.google.com/document/d/e/2PACX-1vQvDe3SoVAPoQc51MgfGCP71IqFYX_rMVEde8zC4qmBCec5f8PLKQRdxa6tsUABT8gWAR9J-EVs2CrQ/pub contact: name: Tracecat Founders email: founders@tracecat.com license: name: AGPL-3.0 url: https://www.gnu.org/licenses/agpl-3.0.html version: '1' servers: - url: /api security: [] tags: - name: public description: Public facing endpoints - name: workflows description: Workflow management - name: actions description: Action management - name: triggers description: Workflow triggers - name: secrets description: Secret management - name: variables description: Workspace variable management paths: /workspaces/{workspace_id}/workflow-executions/{execution_id}/objects/collection/page: post: tags: - workflow-executions summary: Get Workflow Execution Collection Page description: Fetch a bounded page of collection item descriptors. operationId: workflow-executions-get_workflow_execution_collection_page parameters: - name: workspace_id in: path required: true schema: type: string format: uuid title: Workspace Id - name: execution_id in: path required: true schema: type: string title: Execution Id requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/WorkflowExecutionCollectionPageRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/WorkflowExecutionCollectionPageResponse' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' security: - APIKeyCookie: [] - ServiceAccountApiKeyBearer: [] components: schemas: WorkflowExecutionCollectionPageRequest: properties: event_id: type: integer minimum: 1 title: Event Id description: Temporal history event ID field: $ref: '#/components/schemas/WorkflowExecutionObjectField' default: action_result offset: type: integer minimum: 0 title: Offset description: Page start index (0-indexed) default: 0 limit: type: integer maximum: 100 minimum: 1 title: Limit description: Maximum number of items to return default: 25 type: object required: - event_id title: WorkflowExecutionCollectionPageRequest WorkflowExecutionCollectionPageResponse: properties: collection: $ref: '#/components/schemas/CollectionObject' description: Collection metadata for the requested result offset: type: integer minimum: 0 title: Offset description: Requested page offset limit: type: integer minimum: 1 title: Limit description: Requested page size next_offset: anyOf: - type: integer minimum: 0 - type: 'null' title: Next Offset description: Offset to use for next page, or null if no more items items: items: $ref: '#/components/schemas/WorkflowExecutionCollectionPageItem' type: array title: Items description: Collection page descriptors type: object required: - collection - offset - limit title: WorkflowExecutionCollectionPageResponse HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError WorkflowExecutionObjectField: type: string enum: - action_result title: WorkflowExecutionObjectField CollectionObject: properties: typename: anyOf: - type: string - type: 'null' title: Typename type: type: string const: collection title: Type manifest_ref: $ref: '#/components/schemas/ObjectRef' count: type: integer title: Count chunk_size: type: integer title: Chunk Size element_kind: type: string enum: - value - stored_object title: Element Kind schema_version: type: integer title: Schema Version default: 1 index: anyOf: - type: integer - type: 'null' title: Index type: object required: - type - manifest_ref - count - chunk_size - element_kind title: CollectionObject description: >- Handle to a collection manifest stored in blob storage. Represents huge collections without embedding list[StoredObject] in history. The manifest contains chunk references for paged access. This is a small, history-safe handle. The actual data lives in chunked blobs referenced by the manifest. Attributes: manifest_ref: Reference to the manifest blob containing chunk refs. count: Total number of elements in the collection. chunk_size: Number of items per chunk. element_kind: Whether elements are raw values or StoredObject handles. schema_version: Manifest schema version for forward compatibility. WorkflowExecutionCollectionPageItem: properties: index: type: integer minimum: 0 title: Index description: Collection index for this item kind: $ref: '#/components/schemas/WorkflowExecutionCollectionPageItemKind' description: Descriptor type for this collection page item stored: anyOf: - oneOf: - $ref: '#/components/schemas/InlineObject' - $ref: '#/components/schemas/ExternalObject' - $ref: '#/components/schemas/CollectionObject' discriminator: propertyName: type mapping: collection: $ref: '#/components/schemas/CollectionObject' external: $ref: '#/components/schemas/ExternalObject' inline: $ref: '#/components/schemas/InlineObject' - type: 'null' title: Stored description: StoredObject descriptor when kind is stored_object_ref value_preview: anyOf: - type: string - type: 'null' title: Value Preview description: UTF-8 preview of serialized inline value when kind is inline_value value_size_bytes: anyOf: - type: integer minimum: 0 - type: 'null' title: Value Size Bytes description: Serialized inline value size in bytes when kind is inline_value truncated: type: boolean title: Truncated description: Whether value_preview was truncated default: false type: object required: - index - kind title: WorkflowExecutionCollectionPageItem ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError ObjectRef: properties: backend: type: string const: s3 title: Backend default: s3 bucket: type: string title: Bucket key: type: string title: Key size_bytes: type: integer title: Size Bytes sha256: type: string title: Sha256 content_type: type: string title: Content Type default: application/json encoding: type: string enum: - json - json+zstd - json+gzip title: Encoding default: json created_at: type: string format: date-time title: Created At type: object required: - bucket - key - size_bytes - sha256 title: ObjectRef description: >- Reference to an externalized object in blob storage. This is a typed reference that replaces large payloads in workflow context. Only dereference ObjectRef instances created by Tracecat - never arbitrary URIs. WorkflowExecutionCollectionPageItemKind: type: string enum: - stored_object_ref - inline_value title: WorkflowExecutionCollectionPageItemKind InlineObject: properties: typename: anyOf: - type: string - type: 'null' title: Typename type: type: string const: inline title: Type data: title: Data type: object required: - type - data title: InlineObject description: Data stored inline (not externalized). ExternalObject: properties: typename: anyOf: - type: string - type: 'null' title: Typename type: type: string const: external title: Type ref: $ref: '#/components/schemas/ObjectRef' type: object required: - type - ref title: ExternalObject description: Data externalized to blob storage. securitySchemes: APIKeyCookie: type: apiKey in: cookie name: fastapiusersauth ServiceAccountApiKeyBearer: type: http description: Tracecat service account API key. scheme: bearer ````