HTML/CSS to Image Templates API
The Templates API from HTML/CSS to Image — 4 operation(s) for templates.
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OpenAPI Specification
openapi: 3.2.0
info:
title: HTML/CSS to Image Image Generation Templates API
description: REST API for rendering HTML, CSS, and JavaScript (or a URL) into high quality images (PNG, JPG, WebP, PDF). Supports single and batch image creation, image retrieval with resize/crop options, reusable templates with variable substitution, and HMAC-signed URLs for GET-based templated image generation. Authentication is HTTP Basic using your User ID as the username and your API Key as the password.
termsOfService: https://htmlcsstoimage.com/terms
contact:
name: HTML/CSS to Image Support
email: support@htmlcsstoimage.com
url: https://htmlcsstoimage.com
version: '1.0'
servers:
- url: https://hcti.io/v1
security:
- basicAuth: []
tags:
- name: Templates
paths:
/template:
get:
operationId: listTemplates
tags:
- Templates
summary: List all templates.
responses:
'200':
description: The account's templates.
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/Template'
'401':
description: Missing or invalid authentication.
post:
operationId: createTemplate
tags:
- Templates
summary: Create a template.
description: Create a reusable HTML/CSS template containing named variables that are substituted at render time via template_values.
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreateTemplateRequest'
responses:
'200':
description: The created template.
content:
application/json:
schema:
$ref: '#/components/schemas/Template'
'401':
description: Missing or invalid authentication.
/template/{template_id}:
get:
operationId: listTemplateVersions
tags:
- Templates
summary: List versions of a template.
parameters:
- name: template_id
in: path
required: true
schema:
type: string
responses:
'200':
description: The versions of the template.
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/Template'
'404':
description: Template not found.
post:
operationId: editTemplate
tags:
- Templates
summary: Edit a template.
description: Create a new version of an existing template.
parameters:
- name: template_id
in: path
required: true
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreateTemplateRequest'
responses:
'200':
description: The updated template.
content:
application/json:
schema:
$ref: '#/components/schemas/Template'
'401':
description: Missing or invalid authentication.
/image/{template_id}:
post:
operationId: createTemplatedImage
tags:
- Templates
summary: Generate an image from a template.
description: Render a template into an image by supplying template_values for its named variables. Accepts JSON or form data; with form data the template_values must be JSON encoded.
parameters:
- name: template_id
in: path
required: true
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreateTemplatedImageRequest'
responses:
'200':
description: The created image.
content:
application/json:
schema:
$ref: '#/components/schemas/Image'
'401':
description: Missing or invalid authentication.
/image/{template_id}/{template_version}:
post:
operationId: createTemplatedImageVersion
tags:
- Templates
summary: Generate an image from a specific template version.
parameters:
- name: template_id
in: path
required: true
schema:
type: string
- name: template_version
in: path
required: true
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreateTemplatedImageRequest'
responses:
'200':
description: The created image.
content:
application/json:
schema:
$ref: '#/components/schemas/Image'
'401':
description: Missing or invalid authentication.
components:
schemas:
Image:
type: object
properties:
url:
type: string
description: Permanent hosted URL of the rendered image.
viewBox:
type: string
description: The view box used to render the image.
Template:
type: object
properties:
template_id:
type: string
template_version:
type: string
name:
type: string
description:
type: string
CreateTemplateRequest:
type: object
required:
- html
properties:
html:
type: string
description: The template HTML, including named variables.
css:
type: string
name:
type: string
description:
type: string
CreateTemplatedImageRequest:
type: object
required:
- template_values
properties:
template_values:
type: object
additionalProperties: true
description: Key/value substitutions for the template's named variables.
securitySchemes:
basicAuth:
type: http
scheme: basic
description: HTTP Basic authentication using your User ID as the username and your API Key as the password, both from the HTML/CSS to Image dashboard.