openapi: 3.0.3
info:
  title: SparkPost Templates API
  description: Create, retrieve, update, delete, and preview stored email templates. Templates support dynamic substitution data and both text and HTML parts.
  version: 1.0.0
  contact:
    name: SparkPost Developer Support
    url: https://developers.sparkpost.com/api/templates/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
  - url: https://api.sparkpost.com/api/v1
    description: SparkPost Production API
security:
  - ApiKeyAuth: []
paths:
  /templates:
    post:
      operationId: createTemplate
      summary: Create a Template
      description: Create a new email template with HTML, text, and AMP HTML parts.
      tags:
        - Templates
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TemplateRequest'
      responses:
        '200':
          description: Template created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TemplateCreateResponse'
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
    get:
      operationId: listTemplates
      summary: List All Templates
      description: Retrieve a list of all stored templates.
      tags:
        - Templates
      parameters:
        - name: draft
          in: query
          required: false
          description: If true, returns drafts in addition to published templates
          schema:
            type: boolean
        - name: shared_with_subaccounts
          in: query
          required: false
          description: Filter by templates shared with subaccounts
          schema:
            type: boolean
      responses:
        '200':
          description: List of templates
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TemplateListResponse'
  /templates/{id}:
    get:
      operationId: getTemplate
      summary: Retrieve a Template
      description: Retrieve a stored template by its ID.
      tags:
        - Templates
      parameters:
        - name: id
          in: path
          required: true
          description: Template ID
          schema:
            type: string
        - name: draft
          in: query
          required: false
          description: If true, returns the draft version
          schema:
            type: boolean
      responses:
        '200':
          description: Template details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TemplateResponse'
    put:
      operationId: updateTemplate
      summary: Update a Template
      description: Update a draft or published template. Use update_published=true to update a published template directly.
      tags:
        - Templates
      parameters:
        - name: id
          in: path
          required: true
          description: Template ID
          schema:
            type: string
        - name: update_published
          in: query
          required: false
          description: If true, updates the published version directly
          schema:
            type: boolean
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TemplateUpdateRequest'
      responses:
        '200':
          description: Template updated
    delete:
      operationId: deleteTemplate
      summary: Delete a Template
      description: Delete a stored template.
      tags:
        - Templates
      parameters:
        - name: id
          in: path
          required: true
          description: Template ID
          schema:
            type: string
      responses:
        '200':
          description: Template deleted
        '409':
          description: Template is in use by an active transmission
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /templates/{id}/preview:
    post:
      operationId: previewTemplate
      summary: Preview a Template
      description: Render a template with substitution data to preview the output.
      tags:
        - Templates
      parameters:
        - name: id
          in: path
          required: true
          description: Template ID
          schema:
            type: string
        - name: draft
          in: query
          required: false
          description: If true, previews the draft version
          schema:
            type: boolean
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                substitution_data:
                  type: object
                  additionalProperties: true
                  description: Variables to substitute into the template
      responses:
        '200':
          description: Rendered template preview
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TemplatePreviewResponse'
  /utils/content-previewer:
    post:
      operationId: previewInlineTemplate
      summary: Preview Inline Template
      description: Preview an inline template with substitution data without saving it.
      tags:
        - Templates
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                substitution_data:
                  type: object
                  additionalProperties: true
                content:
                  $ref: '#/components/schemas/TemplateContent'
      responses:
        '200':
          description: Rendered inline template preview
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
  schemas:
    TemplateContent:
      type: object
      properties:
        html:
          type: string
          description: HTML part of the email
        text:
          type: string
          description: Plain text part of the email
        amp_html:
          type: string
          description: AMP HTML part of the email
        subject:
          type: string
          description: Email subject line (supports substitution variables)
        from:
          oneOf:
            - type: string
            - type: object
              properties:
                email:
                  type: string
                name:
                  type: string
          description: Sender address
        reply_to:
          type: string
          description: Reply-to address
        headers:
          type: object
          additionalProperties:
            type: string
          description: Additional email headers
    TemplateOptions:
      type: object
      properties:
        transactional:
          type: boolean
        open_tracking:
          type: boolean
        click_tracking:
          type: boolean
    TemplateRequest:
      type: object
      properties:
        id:
          type: string
          description: Unique alphanumeric ID (auto-generated if not provided)
        name:
          type: string
          description: Display name for the template
        description:
          type: string
          description: Template description
        content:
          $ref: '#/components/schemas/TemplateContent'
        options:
          $ref: '#/components/schemas/TemplateOptions'
        shared_with_subaccounts:
          type: boolean
          description: Whether this template is shared with subaccounts
    TemplateUpdateRequest:
      type: object
      properties:
        name:
          type: string
        description:
          type: string
        content:
          $ref: '#/components/schemas/TemplateContent'
        options:
          $ref: '#/components/schemas/TemplateOptions'
        shared_with_subaccounts:
          type: boolean
        published:
          type: boolean
          description: Set to true to publish the draft
    TemplateCreateResponse:
      type: object
      properties:
        results:
          type: object
          properties:
            id:
              type: string
    TemplateResponse:
      type: object
      properties:
        results:
          type: object
          properties:
            id:
              type: string
            name:
              type: string
            description:
              type: string
            published:
              type: boolean
            content:
              $ref: '#/components/schemas/TemplateContent'
            options:
              $ref: '#/components/schemas/TemplateOptions'
            shared_with_subaccounts:
              type: boolean
            last_update_time:
              type: string
              format: date-time
    TemplateListResponse:
      type: object
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/TemplateResponse'
    TemplatePreviewResponse:
      type: object
      properties:
        results:
          type: object
          properties:
            subject:
              type: string
            html:
              type: string
            text:
              type: string
            amp_html:
              type: string
            from:
              type: string
    ErrorResponse:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            properties:
              message:
                type: string
              code:
                type: string
              description:
                type: string