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

# Preview template

> Preview a managed email campaign template.



## OpenAPI

````yaml /api-reference/openapi.json post /email/templates/{templateId}/preview
openapi: 3.1.0
info:
  title: Dench API
  version: 1.0.0
  description: >-
    Versioned Dench workspace API. The operation registry is shared with the
    Dench CLI parity layer, so every CLI command maps to an endpoint here.
servers:
  - url: https://www.dench.com/api/v1
security: []
tags:
  - name: agent-config
    description: Agent Config operations.
  - name: approvals
    description: Approvals operations.
  - name: apps
    description: Apps operations.
  - name: auth
    description: Auth operations.
  - name: billing
    description: Billing operations.
  - name: browser
    description: Browser operations.
  - name: chat
    description: Chat operations.
  - name: crm
    description: Crm operations.
  - name: email
    description: Email operations.
  - name: files
    description: Files operations.
  - name: gateway
    description: Gateway operations.
  - name: local
    description: Local operations.
  - name: memory
    description: Memory operations.
  - name: meta
    description: Meta operations.
  - name: routines
    description: Routines operations.
  - name: workspace
    description: Workspace operations.
paths:
  /email/templates/{templateId}/preview:
    post:
      tags:
        - email
      summary: Preview template
      description: Preview a managed email campaign template.
      operationId: email_template_preview
      parameters:
        - name: templateId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                data:
                  description: Personalization data for {{variable}} placeholders.
                  type: object
                  propertyNames:
                    type: string
                  additionalProperties: {}
            example:
              data:
                firstName: Ada
                company: Lovelace Labs
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  subject:
                    type: string
                  htmlBody:
                    type: string
                  textBody:
                    type: string
                  variableNames:
                    type: array
                    items:
                      type: string
                required:
                  - subject
                  - htmlBody
                  - variableNames
                additionalProperties: false
              example:
                subject: Hi Ada
                htmlBody: <p>Hi Ada, saw your work at Lovelace Labs.</p>
                variableNames:
                  - company
                  - firstName
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'
      security:
        - DenchApiKey: []
        - AgentSession: []
components:
  responses:
    BadRequest:
      description: Invalid request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Unauthorized:
      description: Missing or invalid authentication
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    NotFound:
      description: Operation or resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    InternalError:
      description: Server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
  schemas:
    ApiError:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - message
            - type
            - code
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string
            details: {}
  securitySchemes:
    DenchApiKey:
      type: http
      scheme: bearer
      bearerFormat: DENCH_API_KEY
      description: >-
        Workspace-scoped Dench API key from workspace settings. This is the same
        key used by DENCH_API_KEY in sandboxes.
    AgentSession:
      type: http
      scheme: bearer
      bearerFormat: dch_agent_*
      description: >-
        Agent session token created by `dench signin`. Gateway-backed routes
        exchange this token for the workspace gateway key.

````