Lob

Lob Creatives API

The creatives endpoint allows you to create and view creatives. Creatives are used to create reusable letter and postcard templates. The API provides endpoints for creating creatives, updating creatives, retrieving individual creatives, and deleting creatives.

OpenAPI Specification

lob-creatives-api-openapi.yml Raw ↑
openapi: 3.0.3
info:
  title: Lob Creatives API
  version: 1.20.2
  description: "Experience direct mail like never before, with unmatched personalization and scalability \x14 all in one intuitive platform."
  license:
    name: MIT
    url: https://mit-license.org/
  contact:
    name: Lob Developer Experience
    url: https://support.lob.com/
    email: lob-openapi@lob.com
  termsOfService: https://www.lob.com/legal
servers:
- url: https://api.lob.com/v1
  description: production
security:
- basicAuth: []
tags:
- name: Creatives
  description: 'The creatives endpoint allows you to create and view creatives. Creatives are used to create

    reusable letter and postcard templates. The API provides endpoints for creating creatives, updating creatives,

    retrieving individual creatives, and deleting creatives.

    '
paths:
  /creatives:
    post:
      operationId: creative_create
      summary: Create
      description: Creates a new creative with the provided properties
      tags:
      - Creatives
      parameters:
      - $ref: '#/components/parameters/lang_spec'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/creative_writable'
            example:
              campaign_id: cmp_e05ee61ff80764b
              resource_type: postcard
              description: Our 4x6 postcard creative
              details: {}
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/creative_writable'
            encoding:
              example-prop:
                style: deepObject
                explode: true
            example:
              campaign_id: cmp_e05ee61ff80764b
              resource_type: postcard
              description: Our 4x6 postcard creative
              details: {}
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/creative_writable'
            example:
              campaign_id: cmp_e05ee61ff80764b
              resource_type: postcard
              description: Our 4x6 postcard creative
              details: {}
      responses:
        '200':
          description: Creative created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/creative'
              example:
                id: crv_2a3b096c409b32c
                description: Our 4x6 postcard creative
                from: adr_210a8d4b0b76d77b
                resource_type: postcard
                details: {}
                metadata: {}
                template_preview_urls: {}
                template_previews: []
                campaigns: []
                date_created: '2017-09-05T17:47:53.767Z'
                date_modified: '2017-09-05T17:47:53.767Z'
                object: creative
        default:
          $ref: '#/components/responses/creatives_error'
      x-codeSamples:
      - lang: Shell
        source: "curl https://api.lob.com/v1/creatives \\\n  -u <YOUR API KEY>: \\\n  -d \"campaign_id=cmp_e05ee61ff80764b\" \\\n  -d \"resource_type=postcard\" \\\n  -d \"details={}\"\n"
      - lang: Ruby
        source: "creativeCreate = CreativeWritable.new({\n  campaign_id: \"cmp_e05ee61ff80764b\",\n  resource_type: \"postcard\",\n  description: \"Our 4x6 postcard creative\",\n  from: \"adr_210a8d4b0b76d77b\",\n  front: \"tmpl_4aa14648113e45b\",\n  back: \"tmpl_4aa14648113e45b\",\n  details: PostcardDetailsWritable.new({\n    mail_type: \"usps_first_class\",\n  }),\n});\n\ncreativeApi = CreativesApi.new(config)\n\nbegin\n  createdCreative = creativeApi.create(creativeCreate)\nrescue => err\n  p err.message\nend\n"
        label: RUBY
components:
  schemas:
    date_created:
      type: string
      format: date-time
      description: A timestamp in ISO 8601 format of the date the resource was created.
    crv_back:
      description: "The artwork to use as the back of your postcard creative.\n\nNotes:\n- HTML merge variables should not include delimiting whitespace.\n- PDF, PNG, and JPGs must be sized at 4.25\"x6.25\", 6.25\"x9.25\", or 6.25\"x11.25\" at 300 DPI, while supplied HTML template will be rendered to the specified `size`.\n- Be sure to leave room for address and postage information by following the templates provided here:\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/4x6_postcard.pdf\" target=\"_blank\">4x6 template</a>\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/6x9_postcard.pdf\" target=\"_blank\">6x9 template</a>\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/6x11_postcard.pdf\" target=\"_blank\">6x11 template</a>\n\n\nSee [here](#section/HTML-Examples) for HTML examples.\n"
      oneOf:
      - $ref: '#/components/schemas/tmpl_id'
      - $ref: '#/components/schemas/local_file_path'
    custom_envelope_returned:
      type: object
      description: A nested custom envelope object containing more information about the custom envelope used or `null` if a custom envelope was not used.
      required:
      - id
      - url
      - object
      properties:
        id:
          type: string
          description: The unique identifier of the custom envelope used.
          maxLength: 40
        url:
          type: string
          description: The url of the envelope asset used.
        object:
          type: string
          enum:
          - envelope
          default: envelope
      nullable: true
    local_file_path:
      type: string
      description: The path to a local file.
      pattern: ^(?!https://)[a-zA-Z0-9@:%._+~#=/]{1,256}.(html?|pdf|png|jpg)$
    crv_front:
      description: 'The artwork to use as the front of your postcard.


        Notes:

        - HTML merge variables should not include delimiting whitespace.

        - PDF, PNG, and JPGs must be sized at 4.25"x6.25", 6.25"x9.25", or 6.25"x11.25" at 300 DPI, while supplied HTML template will be rendered to the specified `size`.


        See [here](#section/HTML-Examples) for HTML examples.

        '
      oneOf:
      - $ref: '#/components/schemas/tmpl_id'
      - $ref: '#/components/schemas/local_file_path'
    crv_inside:
      description: "The artwork to use as the inside of your self mailer creative.\nNotes:\n- HTML merge variables should not include delimiting whitespace.\n- PDF, PNG, and JPGs must be sized at 6.25\"x18.25\", 12.25\"x9.25\" or 11.25\"x9.25\" at 300 DPI, while supplied HTML template will be rendered to the specified `size`.\n- Be sure to leave room for address and postage information by following the templates provided here:\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/self_mailers/6x18_sfm_bifold_template.pdf\" target=\"_blank\">6x18 bifold template</a>\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/self_mailers/11x9_sfm_bifold_template.pdf\" target=\"_blank\">11x9 bifold template</a>\n  - <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/self_mailers/12x9_sfm_bifold_template.pdf\" target=\"_blank\">12x9 bifold template</a>\n\n\nSee [here](#section/HTML-Examples) for HTML examples.\n"
      oneOf:
      - $ref: '#/components/schemas/tmpl_id'
      - $ref: '#/components/schemas/local_file_path'
    adr_id:
      type: string
      description: Unique identifier prefixed with `adr_`.
      pattern: ^adr_[a-zA-Z0-9]+$
    error:
      type: object
      description: Lob uses RESTful HTTP response codes to indicate success or failure of an API request. In general, 2xx indicates success, 4xx indicate an input error, and 5xx indicates an error on Lob's end.
      required:
      - error
      properties:
        error:
          type: object
          required:
          - message
          - status_code
          - code
          properties:
            message:
              type: string
              description: A human-readable message with more details about the error
              example: Rate limit exceeded. Please wait 5 seconds and try your request again.
            status_code:
              $ref: '#/components/schemas/failure_status_code'
            code:
              type: string
              enum:
              - bad_request
              - conflict
              - feature_limit_reached
              - internal_server_error
              - invalid
              - not_deletable
              - not_found
              - request_timeout
              - service_unavailable
              - unrecognized_endpoint
              - unsupported_lob_version
              - address_length_exceeds_limit
              - bank_account_already_verified
              - bank_error
              - billing_address_required
              - custom_envelope_inventory_depleted
              - deleted_bank_account
              - failed_deliverability_strictness
              - file_pages_below_min
              - file_pages_exceed_max
              - file_size_exceeds_limit
              - foreign_return_address
              - inconsistent_page_dimensions
              - invalid_bank_account
              - invalid_bank_account_verification
              - invalid_check_international
              - invalid_country_covid
              - invalid_file
              - invalid_file_dimensions
              - invalid_file_download_time
              - invalid_file_url
              - invalid_image_dpi
              - invalid_international_feature
              - invalid_perforation_return_envelope
              - invalid_template_html
              - mail_use_type_can_not_be_null
              - merge_variable_required
              - merge_variable_whitespace
              - payment_method_unverified
              - pdf_encrypted
              - special_characters_restricted
              - unembedded_fonts
              - email_required
              - invalid_api_key
              - publishable_key_not_allowed
              - rate_limit_exceeded
              - unauthorized
              - unauthorized_token
              description: 'A pre-defined string identifying an error. Error codes fall into three categories:


                **GENERIC**

                * `bad_request` - 422: an invalid request was made. See error message for details.

                * `conflict` - 409/422: this operation would leave data in a conflicted state.

                * `feature_limit_reached` - 403: the account has reached its resource limit and requires upgrading to add more.

                * `internal_server_error` - 500: an error has occured on Lob''s servers. Please try request again.

                * `invalid` - 422: an invalid request was made. See error message for details.

                * `not_deletable` - 422: an attempt was made to delete a resource, but the resource cannot be deleted.

                * `not_found` - 404: the requested resource was not found.

                * `request_timeout` - 408: the request took too long. Please try again.

                * `service_unavailable` - 503: the Lob servers are temporarily unavailable. Please try agian.

                * `unrecognized_endpoint` - 404: the requested endpoint doesn''t exist.

                * `unsupported_lob_version` - 422: an unsupported Lob API version was requested.


                **ADVANCED**

                * `address_length_exceeds_limit` - 422: the sum of to.address_line1 and to.address_line2 cannot surpass 50 characters.

                * `bank_account_already_verified` - 422: the bank account has already been verified.

                * `bank_error` - 422: there''s an issue with the bank account.

                * `billing_address_required` - 403: in order to create a live mail piece, your account needs to set up a billing address.

                * `custom_envelope_inventory_depleted` - 422: custom envelope inventory is depleted, and more will need to be ordered.

                * `deleted_bank_account` - 404: checks cannot be created with a deleted bank account.

                * `failed_deliverability_strictness` - 422: the `to` address doesn''t meet strictness requirements. See <a href="https://dashboard.lob.com/#/settings/account" target="_blank">Account Settings</a> to configure strictness.

                * `file_pages_below_min` - 422: not enough pages.

                * `file_pages_exceed_max` - 422: too many pages.

                * `file_size_exceeds_limit` - 422: the file size is too large. See description for details.

                * `foreign_return_address` - 422: the `from` address must be a US address.

                * `inconsistent_page_dimensions` - 422: all pages of the input file must have the same dimensions.

                * `invalid_bank_account` - 422: the provided bank routing number is invalid.

                * `invalid_bank_account_verification` - 422: verification amounts do not match.

                * `invalid_check_international` - 422: checks cannot be sent internationally.

                * `invalid_country_covid` - 422: the postal service in the specified country is currently unable to process the request due to COVID-19 restrictions.

                * `invalid_file` - 422: the file is invalid.

                * `invalid_file_dimensions` - 422: file dimensions are incorrect for the selected mail type.

                * `invalid_file_download_time` - 422: file download from remote server took too long.

                * `invalid_file_url` - 422: the file URL when creating a resource is invalid.

                * `invalid_image_dpi` - 422: DPI must be at least 300.

                * `invalid_international_feature` - 422: the specified product cannot be sent to the destination.

                * `invalid_perforation_return_envelope` - 422: both `return_envelope` and `perforation` must be used together.

                * `invalid_template_html` - 422: the provided HTML is invalid.

                * `mail_use_type_can_not_be_null` - 422: use_type must be one of "marketing" or "operational". Alternatively, an admin can set the account default use type in Account Settings.

                * `merge_variable_required` - 422: a required merge variable is missing.

                * `merge_variable_whitespace` - 422: merge variable names cannot contain whitespace.

                * `payment_method_unverified` - 401: you must have a verified bank account or credit card to submit live requests.

                * `pdf_encrypted` - 422: an encrypted PDF was provided.

                * `special_characters_restricted` - 422: cannot use special characters for merge variable names.

                * `unembedded_fonts` - 422: the provided PDF contains non-standard unembedded fonts. See description for details.


                **AUTHENTICATION**

                * `email_required` - 401: account must have a verified email address before creating live resources.

                * `invalid_api_key` - 401/403: the API key is invalid.

                * `publishable_key_not_allowed` - 403: the requested operation needs a secret key, not a publishable key. See [API Keys](#section/API-Keys) for more information.

                * `rate_limit_exceeded` - 429: requests were sent too quickly and must be slowed down.

                * `unauthorized` - 401: the request isn''t authorized.

                * `unauthorized_token` - 401: token isn''t authorized.

                '
    tmpl_id:
      type: string
      description: Unique identifier prefixed with `tmpl_`. ID of a saved [HTML template](#section/HTML-Templates).
      pattern: ^tmpl_[a-zA-Z0-9]+$
    crv_file:
      description: 'Notes:

        - HTML merge variables should not include delimiting whitespace.

        - All pages of a supplied PDF file must be sized at 8.5"x11", while supplied HTML will be rendered and trimmed to as many 8.5"x11" pages as necessary.

        - For design specifications, please see our <a href="https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/letter_template.pdf" target="_blank">PDF</a> and [HTML](#section/HTML-Examples) templates.

        - If a `custom_envelope` is used, follow <a href="https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/letter_custom_envelope.pdf" target="_blank">this template</a>.

        - For domestic destinations, the file limit is 60 pages single-sided or 120 pages double-sided. For international destinations, the file limit is 6 pages single-sided or 12 pages double-sided. PDFs that surpass the file limit will error, while HTML that renders more pages than the file limit will be trimmed.

        - Any letters over 6 pages single-sided or 12 pages double-sided will be placed in a <a href="https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/letter_flat_template.pdf" target="_blank">flat envelope</a> instead of the standard double window envelope.


        See <a href="https://lob.com/pricing/print-mail#compare" target="_blank">pricing</a> for extra costs incurred.'
      oneOf:
      - $ref: '#/components/schemas/tmpl_id'
      - $ref: '#/components/schemas/local_file_path'
    crv_id:
      type: string
      description: Unique identifier prefixed with `crv_`.
      pattern: ^crv_[a-zA-Z0-9]+$
      example: crv_2a3b096c409b32c
    company:
      type: string
      description: 'Either `name` or `company` is required, you may also add both. Must be no longer than 40 characters. If both `name` and `company` are provided, they will be printed on two separate lines above the rest of the address. This field can be used for any secondary recipient information which is not part of the actual mailing address (Company Name, Department, Attention Line, etc).

        '
      maxLength: 40
      nullable: true
    returned_resource:
      oneOf:
      - allOf:
        - title: Postcard Creative
          required:
          - resource_type
          - details
          properties:
            resource_type:
              type: string
              description: Mailpiece type for the creative
              enum:
              - postcard
            details:
              $ref: '#/components/schemas/returned'
        - $ref: '#/components/schemas/creative_base'
      - allOf:
        - title: Letter Creative
          required:
          - from
          - resource_type
          - details
          properties:
            resource_type:
              type: string
              description: Mailpiece type for the creative
              enum:
              - letter
            details:
              $ref: '#/components/schemas/letter_details_returned'
        - $ref: '#/components/schemas/creative_base'
      - allOf:
        - title: Self Mailer Creative
          required:
          - resource_type
          - details
          properties:
            resource_type:
              type: string
              description: Mailpiece type for the creative
              enum:
              - self_mailer
            details:
              $ref: '#/components/schemas/self_mailer_details_returned'
        - $ref: '#/components/schemas/creative_base'
    creative_base:
      type: object
      properties:
        from:
          $ref: '#/components/schemas/from_attribute'
        description:
          $ref: '#/components/schemas/resource_description'
        metadata:
          $ref: '#/components/schemas/metadata'
    extra_service:
      type: string
      enum:
      - certified
      - certified_return_receipt
      - registered
      - null
      description: "Add an extra service to your letter. Can only be non-`null` if `mail_type` isn't `usps_standard`. See <a href=\"https://www.lob.com/pricing/print-mail#compare\" target=\"_blank\">pricing</a> for extra costs incurred.\n  * `certified` - track and confirm delivery for domestic destinations. An extra sheet (1 PDF page single-sided or 2 PDF pages double-sided) is added to the beginning of your letter for address and barcode information. See here for templates: <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/letter_certified_template.pdf\" target=\"_blank\">#10 envelope</a> and <a href=\"https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/letter_certified_flat_template.pdf\" target=\"_blank\">flat envelope</a> (used for letters over 6 pages single-sided or 12 pages double-sided). You will not be charged for this extra sheet.\n  * `certified_return_receipt` - request an electronic copy of the recipient's signature to prove delivery of your certified letter\n  * `registered` - provides tracking and confirmation for international addresses\n  \nNot available for `us_legal` letter size.\n"
      nullable: true
    color:
      type: boolean
      description: Set this key to `true` if you would like to print in color. Set to `false` if you would like to print in black and white.
    inline_address_us:
      allOf:
      - $ref: '#/components/schemas/address_editable_us'
      - type: object
        required:
        - address_line1
        - address_city
        - address_state
        - address_zip
    letter_add_on_types:
      type: string
      enum:
      - buckslips
      - cards
      - custom_envelope
    cmp_schedule_type:
      description: How the campaign should be scheduled. Only value available today is `immediate`.
      type: string
      enum:
      - immediate
    letter_details_writable:
      description: Properties that the letters in your Creative should have. See the `qr_code` attribute below to add a QR code to your creative.
      required:
      - color
      properties:
        address_placement:
          $ref: '#/components/schemas/address_placement'
        add_on_types:
          description: An array containing the types of add-ons for the Letter Creative.
          type: array
          items:
            $ref: '#/components/schemas/letter_add_on_types'
          minItems: 0
          maxItems: 3
          nullable: true
        buckslips:
          description: A single-element array containing an existing buckslip id in a string format. See [buckslips](#tag/Buckslips) for more information. Note that buckslip letter campaigns require a minimum send quantity of 5,000 letters per campaign.
          type: array
          items:
            $ref: '#/components/schemas/buckslip_id'
          minItems: 0
          maxItems: 1
          nullable: true
        cards:
          description: A single-element array containing an existing card id in a string format. See [cards](#tag/Cards) for more information.
          type: array
          items:
            $ref: '#/components/schemas/card_id'
          minItems: 0
          maxItems: 1
          nullable: true
        color:
          $ref: '#/components/schemas/color'
        custom_envelope:
          $ref: '#/components/schemas/user_provided'
        double_sided:
          $ref: '#/components/schemas/double_sided'
        extra_service:
          $ref: '#/components/schemas/extra_service'
        mail_type:
          $ref: '#/components/schemas/mail_type'
        qr_code:
          $ref: '#/components/schemas/qr_code_campaigns'
    card_id:
      type: string
      description: Unique identifier prefixed with `card_`.
      pattern: ^card_[a-zA-Z0-9]+$
    resource_description:
      type: string
      description: 'An internal description that identifies this resource. Must be no longer than 255 characters.

        '
      maxLength: 255
      nullable: true
    address_placement:
      type: string
      enum:
      - top_first_page
      - insert_blank_page
      - bottom_first_page_center
      - bottom_first_page
      description: "Specifies the location of the address information that will show through the double-window envelope. To see how this will impact your letter design, view our letter template.\nSome values are exclusive to certain customers. Upgrade to the appropriate <a href=\"https://dashboard.lob.com/#/settings/editions\" target=\"_blank\">Print & Mail Edition</a> to gain access.\n  * `top_first_page` - (default) print address information at the top of your provided first page\n  * `insert_blank_page` - insert a blank address page at the beginning of your file (you will be charged for the extra page)\n  * `bottom_first_page_center` - **(exclusive, deprecation planned within a few months)** print address information at the bottom center of your provided first page\n  * `bottom_first_page` - **(exclusive)** print address information at the bottom of your provided first page\n"
      default: top_first_page
    self_mailer_size:
      type: string
      enum:
      - 6x18_bifold
      - 11x9_bifold
      - 12x9_bifold
      - 17.75x9_trifold
      description: Specifies the size of the self mailer. The `17.75x9_trifold` size is in beta. Contact support@lob.com or your account contact to learn more.
      default: 6x18_bifold
    campaign_item:
      allOf:
      - $ref: '#/components/schemas/campaign_writable'
      - type: object
        required:
        - id
        - name
        - description
        - schedule_type
        - use_type
        - is_draft
        - creatives
        - uploads
        - auto_cancel_if_ncoa
        - date_created
        - date_modified
        - object
        properties:
          id:
            $ref: '#/components/schemas/cmp_id'
          is_draft:
            description: Whether or not the campaign is still a draft.
            type: boolean
            default: true
          creatives:
            description: An array of creatives that have been associated with this campaign.
            type: array
          uploads:
            description: A single-element array containing the upload object that is assocated with this campaign.
            type: array
            minItems: 0
            maxItems: 1
          object:
            type: string
            description: Value is resource type.
            enum:
            - campaign
            default: campaign
          date_created:
            $ref: '#/components/schemas/date_created'
          date_modified:
            $ref: '#/components/schemas/date_modified'
          deleted:
            $ref: '#/components/schemas/deleted'
    postcard_size:
      type: string
      enum:
      - 4x6
      - 6x9
      - 6x11
      description: 'Specifies the size of the postcard. Only `4x6` postcards can be sent to international destinations.

        '
      default: 4x6
    double_sided:
      type: boolean
      description: Set this attribute to `true` for double sided printing, or `false` for for single sided printing. Defaults to `true`.
      default: true
    self_mailer_details_writable:
      description: Properties that the self mailers in your Creative should have. See the `qr_code` attribute below to add a QR code to your creative.
      required:
      - color
      properties:
        mail_type:
          $ref: '#/components/schemas/mail_type'
        size:
          $ref: '#/components/schemas/self_mailer_size'
        qr_code:
          $ref: '#/components/schemas/qr_code_campaigns'
    mail_type:
      type: string
      enum:
      - usps_first_class
      - usps_standard
      description: 'A string designating the mail postage type:

        * `usps_first_class` - (default)

        * `usps_standard` - a <a href="https://lob.com/pricing/print-mail#compare" target="_blank">cheaper option</a> which is

        less predictable and takes longer to deliver. `usps_standard` cannot be used with `4x6`

        postcards or for any postcards sent outside of the United States.

        '
      default: usps_first_class
    deleted:
      type: boolean
      description: Only returned if the resource has been successfully deleted.
    from_attribute:
      title: From
      description: Must either be an address ID or an inline object with correct address parameters. All addresses will be standardized into uppercase without being modified by verification.
      oneOf:
      - $ref: '#/components/schemas/adr_id'
      - $ref: '#/components/schemas/inline_address_us'
    writable:
      description: Properties that the postcards in your Creative should have. See the `qr_code` attribute below to add a QR code to your creative.
      required:
      - color
      properties:
        mail_type:
          $ref: '#/components/schemas/mail_type'
        size:
          $ref: '#/components/schemas/postcard_size'
        qr_code:
          $ref: '#/components/schemas/qr_code_campaigns'
    creative:
      allOf:
      - $ref: '#/components/schemas/lob_base'
      - $ref: '#/components/schemas/returned_resource'
      - type: object
        required:
        - id
        - description
        - from
        - resource_type
        - details
        - metadata
        - template_preview_urls
        - template_previews
        - campaigns
        - date_created
        - date_modified
        - object
        - deleted
        properties:
          deleted:
            type: boolean
            description: Whether the resource has been deleted.
          id:
            $ref: '#/components/schemas/crv_id'
          template_preview_urls:
            title: Template Preview URLs
            type: object
            description: Preview URLs associated with a creative's artwork asset(s) if the creative uses HTML templates as assets. An empty object will be returned if no `template_preview`s have been generated.
          template_previews:
            title: Template Previews
            type: array
            items:
              type: object
            description: A list of template preview objects if the creative uses HTML template(s) as artwork asset(s). An empty array will be returned if no `template_preview`s have been generated for the creative.
          campaigns:
            $ref: '#/components/schemas/campaign_list'
          object:
            type: string
            description: Value is resource type.
            enum:
            - creative
            default: creative
    letter_details_returned:
      description: Properties that the letters in your Creative should have. See the `qr_code` attribute below to add a QR code to your creative.
      properties:
        address_placement:
          $ref: '#/components/schemas/address_placement'
        buckslips:
          description: A single-element array containing an existing buckslip id in a string format. See [buckslips](#tag/Buckslips) for more information.
          type: array
          items:
            $ref: '#/components/schemas/buckslip_id'
          minItems: 0
          maxItems: 1
          nullable: true
        cards:
          description: A single-element array containing an existing card id in a string format. See [cards](#tag/Cards) for more information.
          type: array
          items:
            $ref: '#/components/schemas/card_id'
          minItems: 0
          maxItems: 1
          nullable: true
        custom_envelope:
          $ref: '#/components/schemas/custom_envelope_returned'
        color:
          $ref: '#/components/schemas/color'
        double_sided:
          $ref: '#/components/schemas/double_sided'
        extra_service:
          $ref: '#/components/schemas/extra_service'
        file_original_url:
          description: The original URL of the `file` template.
          type: string
        mail_type:
          $ref: '#/components/schemas/mail_type'
    lob_base:
      type: object
      required:
      - date_created
      - date_modified
      - object
      properties:
        date_created:
          $ref: '#/components/schemas/date_created'
        date_modified:
          $ref: '#/components/schemas/date_modified'
        deleted:
          $ref: '#/components/schemas/deleted'
        object:
          $ref: '#/components/schemas/object'
    address_editable_us:
      allOf:
      - $ref: '#/components/schemas/address_fields_us'
      - type: object
        anyOf:
        - title: address obj with `name` defined
          required:
          - name
        - title: address obj with `company` defined
          required:
          - company
        properties:
          description:
            $ref: '#/components/schemas/resource_description'
          name:
            type: string
            description: 'Either `name` or `company` is required, you may also add both. Must be no longer than 40 characters. If both `name` and `company` are provided, they will be printed on two separate lines above the rest of the address.

              '
            maxLength: 40
  

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# Full source: https://raw.githubusercontent.com/api-evangelist/lob/refs/heads/main/openapi/lob-creatives-api-openapi.yml