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

# Preview a creative tag sheet (names, declared sizes, destination needs)



## OpenAPI

````yaml /openapi/buyer.yaml post /api/v2/buyer/creatives/tag-sheet-preview
openapi: 3.1.0
info:
  title: Semicola Exchange buyer API
  version: 2.0.0
  description: >-
    Buyer endpoints: advertisers, storefronts and connections, product
    discovery, campaigns, proposals, media buys, creatives and reporting. Every
    write accepts an Idempotency-Key header.
servers:
  - url: https://api.semicola.com
security:
  - bearerAuth: []
  - sessionCookie: []
tags:
  - name: Advertisers
  - name: Storefronts
  - name: Product Discovery
  - name: Campaigns
  - name: Media Buys
  - name: Update Proposals
  - name: Optimization Suggestions
  - name: Creatives
  - name: Catalogs
  - name: Reporting
  - name: Event Sources
  - name: Webhooks
  - name: Tasks
  - name: Audit Logs
  - name: Activity
paths:
  /api/v2/buyer/creatives/tag-sheet-preview:
    post:
      tags:
        - Creatives
      summary: Preview a creative tag sheet (names, declared sizes, destination needs)
      operationId: postBuyerCreativesTagSheetPreview
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                asset:
                  type: object
                  properties:
                    data_url:
                      type: string
                      maxLength: 7340032
                      pattern: ^data:[^,]*;base64,
                    asset_type:
                      type: string
                      enum:
                        - IMAGE
                        - VIDEO
                        - AUDIO
                        - HTML
                        - VAST
                        - ZIP
                    name:
                      type: string
                      minLength: 1
                      maxLength: 255
                    declared_sizes:
                      maxItems: 30
                      type: array
                      items:
                        type: object
                        properties:
                          width:
                            type: integer
                            exclusiveMinimum: 0
                            maximum: 9007199254740991
                          height:
                            type: integer
                            exclusiveMinimum: 0
                            maximum: 9007199254740991
                        required:
                          - width
                          - height
                  required:
                    - data_url
              required:
                - asset
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    anyOf:
                      - type: object
                        properties:
                          filename:
                            type: string
                          creative_count:
                            type: integer
                            minimum: 0
                            maximum: 9007199254740991
                          rows:
                            type: array
                            items:
                              type: object
                              properties:
                                id:
                                  type: string
                                name:
                                  type: string
                                declared_sizes:
                                  type: array
                                  items:
                                    type: object
                                    properties:
                                      width:
                                        type: integer
                                        exclusiveMinimum: 0
                                        maximum: 9007199254740991
                                      height:
                                        type: integer
                                        exclusiveMinimum: 0
                                        maximum: 9007199254740991
                                    required:
                                      - width
                                      - height
                                    additionalProperties: false
                                needs_destination:
                                  type: boolean
                              required:
                                - id
                                - name
                                - declared_sizes
                                - needs_destination
                              additionalProperties: false
                        required:
                          - filename
                          - creative_count
                          - rows
                        additionalProperties: false
                      - type: 'null'
                  error:
                    anyOf:
                      - type: object
                        properties:
                          code:
                            type: string
                          message:
                            type: string
                          field:
                            type: string
                          details: {}
                        required:
                          - code
                          - message
                        additionalProperties: false
                      - type: 'null'
                required:
                  - data
                  - error
                additionalProperties: false
        default:
          description: >-
            Error envelope `{data: null, error: {code, message, field?,
            details?}}`.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key or OAuth access token.
    sessionCookie:
      type: apiKey
      in: cookie
      name: sc_session

````