Customization

Get custom CSS for customer portal

Retrieves the custom CSS styling configuration for the customer portal. This endpoint returns all custom CSS rules that have been configured to customize the appearance, layout, and branding of the subscription customer portal.

What is Custom CSS? Custom CSS allows merchants to fully customize the visual appearance of their customer portal beyond the basic theme settings. This enables complete brand alignment and creates a seamless experience that matches the merchant’s main store design.

Custom CSS Capabilities:

Layout Customization:
- Modify page layouts and spacing
- Adjust grid and flexbox configurations
- Control responsive breakpoints
- Customize navigation and sidebars
Typography:
- Custom fonts and font families
- Font sizes, weights, and line heights
- Letter spacing and text transforms
- Heading and paragraph styles
Colors and Branding:
- Brand color palette application
- Custom background colors and gradients
- Button and link styling
- Hover and focus states
- Border colors and shadows
Component Styling:
- Subscription card appearances
- Form input styling
- Button designs and interactions
- Modal and dialog boxes
- Navigation menus
- Product images and thumbnails
Advanced Features:
- CSS animations and transitions
- Media queries for responsive design
- Pseudo-elements and pseudo-classes
- Custom icons using CSS
- Transform and filter effects

CSS Structure: The returned CSS includes:

Global styles for portal-wide consistency
Component-specific styles
Responsive design rules
Theme overrides
Custom animations
Print styles (optional)

Common CSS Selectors Available:

/* Portal container */
.subscription-portal { }

/* Subscription cards */
.subscription-card { }
.subscription-card-header { }
.subscription-card-body { }

/* Buttons */
.btn-primary { }
.btn-secondary { }
.btn-cancel { }

/* Forms */
.form-control { }
.form-group { }
.form-label { }

/* Navigation */
.portal-nav { }
.nav-item { }

/* Product displays */
.product-item { }
.product-image { }
.product-title { }

Use Cases:

Apply custom branding to match main store design
Create unique visual experiences for different customer segments
Implement seasonal or promotional themes
Enhance mobile responsiveness
Add accessibility improvements (high contrast, larger fonts)
A/B test different portal designs
Integrate with design systems
Implement dark mode or theme switching

Important Notes:

CSS is sanitized for security (XSS prevention)
Certain properties may be restricted for security reasons
External resources (fonts, images) must use HTTPS
CSS is cached for performance - changes may take a few minutes to propagate
Invalid CSS syntax is automatically filtered out
Some core portal elements have !important styles that cannot be overridden

Best Practices:

Use specific selectors to avoid conflicts
Test across different browsers and devices
Keep CSS organized with comments
Use CSS variables for maintainability
Minify CSS for production performance
Consider accessibility in color choices (WCAG compliance)
Provide fallbacks for advanced CSS features

Security Considerations:

CSS is sanitized to prevent code injection
External URLs are validated
JavaScript in CSS is blocked (e.g., expression(), behavior())
Data URIs are validated for malicious content

Authentication: Requires valid X-API-Key header

GET

api

external

subscription-custom-csses

{id}

Get custom CSS for customer portal

curl --request GET \
  --url https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}

const options = {method: 'GET'};

fetch('https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const url = 'https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}';
const options = {method: 'GET'};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}"

	req, _ := http.NewRequest("GET", url, nil)

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

"{\n  \"id\": 12345,\n  \"shop\": \"example-shop.myshopify.com\",\n  \"customCss\": \"/* Global Portal Styles */\\n\" +\n    \".subscription-portal {\\n\" +\n    \"  font-family: 'Helvetica Neue', Arial, sans-serif;\\n\" +\n    \"  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\\n\" +\n    \"  min-height: 100vh;\\n\" +\n    \"}\\n\\n\" +\n    \"/* Subscription Cards */\\n\" +\n    \".subscription-card {\\n\" +\n    \"  border-radius: 12px;\\n\" +\n    \"  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);\\n\" +\n    \"  background: white;\\n\" +\n    \"  padding: 24px;\\n\" +\n    \"  margin-bottom: 16px;\\n\" +\n    \"  transition: transform 0.2s ease, box-shadow 0.2s ease;\\n\" +\n    \"}\\n\\n\" +\n    \".subscription-card:hover {\\n\" +\n    \"  transform: translateY(-2px);\\n\" +\n    \"  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);\\n\" +\n    \"}\\n\\n\" +\n    \"/* Primary Button Styling */\\n\" +\n    \".btn-primary {\\n\" +\n    \"  background-color: #4A90E2;\\n\" +\n    \"  border-color: #4A90E2;\\n\" +\n    \"  color: white;\\n\" +\n    \"  font-weight: 600;\\n\" +\n    \"  padding: 12px 24px;\\n\" +\n    \"  border-radius: 6px;\\n\" +\n    \"  transition: all 0.3s ease;\\n\" +\n    \"}\\n\\n\" +\n    \".btn-primary:hover {\\n\" +\n    \"  background-color: #357ABD;\\n\" +\n    \"  border-color: #357ABD;\\n\" +\n    \"  transform: scale(1.02);\\n\" +\n    \"}\\n\\n\" +\n    \"/* Form Inputs */\\n\" +\n    \".form-control {\\n\" +\n    \"  border: 2px solid #E0E0E0;\\n\" +\n    \"  border-radius: 6px;\\n\" +\n    \"  padding: 10px 14px;\\n\" +\n    \"  font-size: 14px;\\n\" +\n    \"}\\n\\n\" +\n    \".form-control:focus {\\n\" +\n    \"  border-color: #4A90E2;\\n\" +\n    \"  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);\\n\" +\n    \"  outline: none;\\n\" +\n    \"}\\n\\n\" +\n    \"/* Responsive Design */\\n\" +\n    \"@media (max-width: 768px) {\\n\" +\n    \"  .subscription-card {\\n\" +\n    \"    padding: 16px;\\n\" +\n    \"  }\\n\" +\n    \"  .btn-primary {\\n\" +\n    \"    width: 100%;\\n\" +\n    \"  }\\n\" +\n    \"}\",\n  \"enabled\": true,\n  \"version\": 2,\n  \"lastModified\": \"2024-02-20T14:45:00Z\",\n  \"createdAt\": \"2024-01-15T10:30:00Z\",\n  \"updatedAt\": \"2024-02-20T14:45:00Z\"\n}"

{
  "detail": "Valid X-API-Key header is required",
  "status": 401,
  "title": "Authentication required",
  "type": "https://example.com/errors/unauthorized"
}

{
  "detail": "API key does not have permission to view custom CSS settings",
  "status": 403,
  "title": "Insufficient permissions",
  "type": "https://example.com/errors/forbidden"
}

{
  "detail": "No custom CSS has been configured for this shop",
  "status": 404,
  "title": "CSS not found",
  "type": "https://example.com/errors/not-found"
}

Headers

X-API-Key

string

Path Parameters

integer<int64>

required

Query Parameters

api_key

string

API Key (Deprecated - Use Header X-API-Key instead)

Response

Custom CSS successfully retrieved

shop

string

required

bundlingCSS

string

bundlingIframeCSS

string

customCss

string

customerPoratlCSS

string

integer<int64>

Get custom CSS for customer portal

curl --request GET \
  --url https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}

const options = {method: 'GET'};

fetch('https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const url = 'https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}';
const options = {method: 'GET'};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}"

	req, _ := http.NewRequest("GET", url, nil)

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://subscription-admin.appstle.com/api/external/v2/subscription-custom-csses/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

"{\n  \"id\": 12345,\n  \"shop\": \"example-shop.myshopify.com\",\n  \"customCss\": \"/* Global Portal Styles */\\n\" +\n    \".subscription-portal {\\n\" +\n    \"  font-family: 'Helvetica Neue', Arial, sans-serif;\\n\" +\n    \"  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\\n\" +\n    \"  min-height: 100vh;\\n\" +\n    \"}\\n\\n\" +\n    \"/* Subscription Cards */\\n\" +\n    \".subscription-card {\\n\" +\n    \"  border-radius: 12px;\\n\" +\n    \"  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);\\n\" +\n    \"  background: white;\\n\" +\n    \"  padding: 24px;\\n\" +\n    \"  margin-bottom: 16px;\\n\" +\n    \"  transition: transform 0.2s ease, box-shadow 0.2s ease;\\n\" +\n    \"}\\n\\n\" +\n    \".subscription-card:hover {\\n\" +\n    \"  transform: translateY(-2px);\\n\" +\n    \"  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);\\n\" +\n    \"}\\n\\n\" +\n    \"/* Primary Button Styling */\\n\" +\n    \".btn-primary {\\n\" +\n    \"  background-color: #4A90E2;\\n\" +\n    \"  border-color: #4A90E2;\\n\" +\n    \"  color: white;\\n\" +\n    \"  font-weight: 600;\\n\" +\n    \"  padding: 12px 24px;\\n\" +\n    \"  border-radius: 6px;\\n\" +\n    \"  transition: all 0.3s ease;\\n\" +\n    \"}\\n\\n\" +\n    \".btn-primary:hover {\\n\" +\n    \"  background-color: #357ABD;\\n\" +\n    \"  border-color: #357ABD;\\n\" +\n    \"  transform: scale(1.02);\\n\" +\n    \"}\\n\\n\" +\n    \"/* Form Inputs */\\n\" +\n    \".form-control {\\n\" +\n    \"  border: 2px solid #E0E0E0;\\n\" +\n    \"  border-radius: 6px;\\n\" +\n    \"  padding: 10px 14px;\\n\" +\n    \"  font-size: 14px;\\n\" +\n    \"}\\n\\n\" +\n    \".form-control:focus {\\n\" +\n    \"  border-color: #4A90E2;\\n\" +\n    \"  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);\\n\" +\n    \"  outline: none;\\n\" +\n    \"}\\n\\n\" +\n    \"/* Responsive Design */\\n\" +\n    \"@media (max-width: 768px) {\\n\" +\n    \"  .subscription-card {\\n\" +\n    \"    padding: 16px;\\n\" +\n    \"  }\\n\" +\n    \"  .btn-primary {\\n\" +\n    \"    width: 100%;\\n\" +\n    \"  }\\n\" +\n    \"}\",\n  \"enabled\": true,\n  \"version\": 2,\n  \"lastModified\": \"2024-02-20T14:45:00Z\",\n  \"createdAt\": \"2024-01-15T10:30:00Z\",\n  \"updatedAt\": \"2024-02-20T14:45:00Z\"\n}"

{
  "detail": "Valid X-API-Key header is required",
  "status": 401,
  "title": "Authentication required",
  "type": "https://example.com/errors/unauthorized"
}

{
  "detail": "API key does not have permission to view custom CSS settings",
  "status": 403,
  "title": "Insufficient permissions",
  "type": "https://example.com/errors/forbidden"
}

{
  "detail": "No custom CSS has been configured for this shop",
  "status": 404,
  "title": "CSS not found",
  "type": "https://example.com/errors/not-found"
}

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Get custom CSS for customer portal

Headers

Path Parameters

Query Parameters

Response