# PATCH Update customiser settings

Partially update the customiser's settings with a JSON Merge Patch (RFC 7396) of the document the read operation returns: the request body is a JSON object containing only the properties to change. Properties omitted from the patch are unchanged, a null value clears a property that can hold null, `selection_order` replaces wholesale (send every step to reorder one), and an empty object `{}` is a valid no-op. Every property the read publishes is patchable except the read-only descriptors (`object`, `customiser_id`, `currency`, `updated_at`), and a property this resource does not define is refused with a JSON Pointer rather than ignored, so a typo can never silently change meaning. Requires the `customisers:write` scope. A successful update immediately changes the storefront: the customiser's cached configuration is invalidated and translated language content is resynchronised. It never regenerates your Shopify products, product images, or product cache. Send an `Idempotency-Key` header (1-255 visible ASCII characters, e.g. a UUID) to make the write safe to retry: repeating the same key with the same body replays the original response (marked `Idempotency-Replay: true`) without executing again; the same key with a different body is a 409 problem with code `idempotency_key_conflict`. The header is optional here, as on the option families' update operations. Validation failures are 422 problems: `validation_failed` lists every field error in `errors[]` with a JSON `pointer` and, for closed-set violations, the `allowed_values`; `unknown_field` means the body names properties outside the document. The sign minimum, initial, and maximum dimensions are checked against the document the patch would leave behind, so clearing one end of a range is refused exactly as an impossible value is. `icon_font_tier_id` and `icon_length_pricing_id` must name records of this customiser. A 400 problem means the body is not valid JSON or the `Idempotency-Key` header is malformed. 401/403/404/429 behave as on the read operation, with `customisers:write` as the required scope.

- Source URL: https://www.signcustomiser.com/help/api/v3-patch-update-customiser-settings/
- Markdown URL: https://www.signcustomiser.com/help/api/v3-patch-update-customiser-settings.md
- Group: Customiser settings
- Method: PATCH
- Path: /api/v3/customisers/{customiser_id}/settings
- Auth: Bearer token
- Required scopes: `customisers:write`

## Path parameters

- customiser_id (string, required): The customiser id, from the list customisers operation. Example: 1

## Body parameters

- custom_sizing (boolean, optional): No description provided.
- multi_colour (boolean, optional): No description provided.
- text_editor_enabled (boolean, optional): No description provided.
- min_sign_width_cm (integer, optional): No description provided.
- max_sign_width_cm (integer, optional): No description provided.
- max_sign_char (integer, optional): No description provided.
- discount_amount (integer, optional): No description provided.
- custom_css (string, optional): No description provided.
- selection_order (array, optional): No description provided.

## Request body example

```json
{
  "custom_sizing": true,
  "multi_colour": true,
  "text_editor_enabled": true,
  "min_sign_width_cm": 20,
  "max_sign_width_cm": 200,
  "max_sign_char": 40,
  "discount_amount": 500,
  "custom_css": ".sc-price { font-weight: 600; }",
  "selection_order": [
    {
      "family": "colour",
      "label": "Colour",
      "hidden": false
    }
  ]
}
```

## cURL example

```bash
curl https://web.signcustomiser.com/api/v3/customisers/1/settings \
  --request PATCH \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "custom_sizing": true,
  "multi_colour": true,
  "text_editor_enabled": true,
  "min_sign_width_cm": 20,
  "max_sign_width_cm": 200,
  "max_sign_char": 40,
  "discount_amount": 500,
  "custom_css": ".sc-price { font-weight: 600; }",
  "selection_order": [
    {
      "family": "colour",
      "label": "Colour",
      "hidden": false
    }
  ]
}'
```

## Response examples

### 200 Patched settings

```json
{
  "data": {
    "object": "customiser_settings",
    "customiser_id": 42,
    "currency": "USD",
    "add_to_cart": true,
    "alignment": "show_alignment_options",
    "allow_unsupported_characters": true,
    "app_mode": "standard",
    "auto_process_ai_quotes": true,
    "auto_rotate_lightbox": true,
    "braille_dots_use_face_colour": true,
    "braille_table": "en-ueb-g1",
    "cart_action": "cart_page",
    "custom_css": ".sc-price { font-weight: 600; }",
    "custom_letter_height_input": true,
    "custom_letter_height_max_cm": 30,
    "custom_size_input": "when_selected",
    "custom_sizing": true,
    "custom_sizing_max_width_cm": 200,
    "custom_sizing_title": "Custom size",
    "desktop_option_order": "right",
    "desktop_show_sidebar_price": true,
    "disable_braille_untranslatable_popup": true,
    "disable_size_limit_popup": true,
    "discount_amount": 500,
    "discount_option": "none",
    "discount_percentage": 10,
    "drag_enabled": true,
    "etsy_listing_url": null,
    "etsy_show_price": true,
    "example_hover": true,
    "fixed_visualiser": true,
    "font_display": "dropdown",
    "font_scale": 1,
    "generate_ai": true,
    "generate_dxf": true,
    "generate_eps": true,
    "generate_svg": true,
    "glow_effect": "white_neon",
    "glow_switch": "glow_switch",
    "icon_font_tier_id": 3,
    "icon_length_pricing_id": null,
    "icon_min_height_cm": 5,
    "initial_sign_height_cm": 20,
    "initial_sign_length_cm": 60,
    "initial_sign_width_cm": 60,
    "letter_height_display": true,
    "local_cache_enabled": true,
    "manually_clear_loading": true,
    "max_sign_char": 40,
    "max_sign_height_cm": 90,
    "max_sign_length_cm": 300,
    "max_sign_lines": 3,
    "max_sign_width_cm": 200,
    "measurement_decimal": 1,
    "measurement_display": "both",
    "measurement_unit": "both",
    "min_sign_char": 1,
    "min_sign_height_cm": 10,
    "min_sign_length_cm": 10,
    "min_sign_width_cm": 20,
    "mobile_preview_height_percent": 45,
    "mobile_view": "stacked",
    "mounting_colour_location": "separate",
    "multi_colour": true,
    "multi_font": true,
    "part_measurement_display": "show",
    "prevent_size_up": true,
    "pricebox_position": "bottom",
    "recessed_borders": true,
    "rotate_enabled": true,
    "scale_enabled": true,
    "scale_text_with_size": true,
    "scrollable_mobile_options": true,
    "selection_order": [
      {
        "family": "size",
        "label": "Size",
        "hidden": false
      },
      {
        "family": "colour",
        "label": "Colour",
        "hidden": false
      }
    ],
    "share_location": "disabled",
    "show_currency": "show",
    "show_custom_size_button": true,
    "show_day_switch": true,
    "show_glow_switch": true,
    "show_initial_mobile_screen": true,
    "show_menu_steps": true,
    "show_menu_steps_first": true,
    "show_selection_numbers": true,
    "size_display": "all",
    "snap_to_grid_enabled": true,
    "snap_to_grid_size_px": 10,
    "support_colour_location": "separate",
    "taxable_product": true,
    "text_editor_enabled": true,
    "text_orientation_column_direction": "right_to_left",
    "text_orientation_default": "horizontal",
    "text_orientation_mode": "horizontal_only",
    "text_price_start": true,
    "ui_controls_location": "visualiser",
    "zoom_controls_display": "show",
    "updated_at": "2026-05-04T09:12:31Z"
  },
  "links": {
    "self": "https://web.signcustomiser.com/api/v3/customisers/42/settings",
    "documentation": "https://www.signcustomiser.com/help/api/"
  },
  "meta": {
    "api_version": "v3",
    "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
  }
}
```

### 400 Malformed JSON body

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/malformed_json",
  "title": "Malformed JSON",
  "status": 400,
  "code": "malformed_json",
  "detail": "The request body is not valid JSON: Syntax error.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 401 Missing API key

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/missing_api_key",
  "title": "Missing API key",
  "status": 401,
  "code": "missing_api_key",
  "detail": "Provide a store API key as a bearer token: Authorization: Bearer <api key>. Keys are created in the merchant admin under Integrate → API Tokens.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 403 Insufficient scope

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/insufficient_scope",
  "title": "Insufficient scope",
  "status": 403,
  "code": "insufficient_scope",
  "detail": "This operation requires the customisers:write scope, but the API key grants the following scopes: customisers:read. Create a key that includes the required scope in the merchant admin under Integrate → API Tokens.",
  "required_scopes": [
    "customisers:write"
  ],
  "granted_scopes": [
    "customisers:read"
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 404 Unknown customiser

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/resource_not_found",
  "title": "Resource not found",
  "status": 404,
  "code": "resource_not_found",
  "detail": "The requested resource does not exist or does not belong to the authenticated store.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 409 Idempotency key conflict

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/idempotency_key_conflict",
  "title": "Idempotency key conflict",
  "status": 409,
  "code": "idempotency_key_conflict",
  "detail": "This Idempotency-Key was already used for a different request body on this operation. An idempotency key identifies one exact request: retry the original body to replay its response, or send the new body with a fresh key.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 422 Validation failed

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/validation_failed",
  "title": "Validation failed",
  "status": 422,
  "code": "validation_failed",
  "detail": "The request payload failed validation. Correct the fields listed in errors and retry.",
  "errors": [
    {
      "pointer": "/measurement_unit",
      "code": "unsupported_value",
      "detail": "The selected measurement unit is invalid.",
      "allowed_values": [
        "both",
        "centimetres",
        "inches"
      ]
    }
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 422 Unknown field

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/unknown_field",
  "title": "Unknown field",
  "status": 422,
  "code": "unknown_field",
  "detail": "The request contains fields this operation does not define: /max_sign_size.",
  "errors": [
    {
      "pointer": "/max_sign_size",
      "code": "unknown_field",
      "detail": "The field \"max_sign_size\" is not supported by this operation."
    }
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 429 Rate limited

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/rate_limited",
  "title": "Too many requests",
  "status": 429,
  "code": "rate_limited",
  "detail": "You have exceeded the request limit for this API key. Wait 60 seconds, then retry.",
  "retry_after": 60,
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```