Customiser mountings

Create a mounting

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Adds a mounting to the customiser, at the end of the current presentation order. Only name is required; every other field has a documented default (visualisation none, no letter parts, both exclusion arrays empty, base_price 0, price_multiplier 1, price_multiplier_target base_letter_price).

POST/api/v3/customisers/{customiser_id}/mountings

Create a mounting

Adds a mounting to the customiser, at the end of the current presentation order. Only `name` is required; every other field has a documented default (`visualisation` none, no letter parts, both exclusion arrays empty, `base_price` 0, `price_multiplier` 1, `price_multiplier_target` base_letter_price). The `*_pct` proportions belong to one visualisation each, so a body naming one the mounting's visualisation would never read is a 422 on that field. `excluded_colour_ids` and `excluded_backboard_ids` must name the customiser's own colours and backboards — an id from another customiser or another store is a 422 on the offending element. Image fields are read-only until the upload surface ships, and `sort_order` moves only through the reorder operation; naming either is a 422. Requires `customisers:write` and an `Idempotency-Key`. The write clears the customiser's cached storefront configuration and runs the advisory language sync. It never regenerates Shopify products, product images, or the product cache, so live listings are untouched. Option writes also spend one unit of a separate per-key option-write budget; exhausting it returns a 429 with `retry_after`.

Create a mounting

Overview

The *_pct proportions belong to one visualisation each, so a body naming one the mounting's visualisation would never read is a 422 on that field. excluded_colour_ids and excluded_backboard_ids must name the customiser's own colours and backboards — an id from another customiser or another store is a 422 on the offending element. Image fields are read-only until the upload surface ships, and sort_order moves only through the reorder operation; naming either is a 422. Requires customisers:write and an Idempotency-Key. The write clears the customiser's cached storefront configuration and runs the advisory language sync. It never regenerates Shopify products, product images, or the product cache, so live listings are untouched. Option writes also spend one unit of a separate per-key option-write budget; exhausting it returns a 429 with retry_after.

Authorisation

Bearer token required. Include it in the Authorization header.

Required scope: customisers:write

Path parameters

customiser_idstringpathrequired

The customiser id.

Example: 1

Request body

visualisationstringbody

letter_partsarraybody

price_multiplier_targetstringbody

namestringbody

descriptionstringbody

pedestal_pole_width_pctintegerbody

pedestal_base_depth_pctintegerbody

sign_feet_base_depth_pctintegerbody

sign_feet_post_height_pctintegerbody

sign_feet_inset_pctintegerbody

excluded_colour_idsarraybody

excluded_backboard_idsarraybody

base_priceintegerbody

price_multipliernumberbody

Request body example

{
  "visualisation": "screw",
  "letter_parts": [
    "top"
  ],
  "price_multiplier_target": "base_letter_price",
  "name": "Wall Screws",
  "description": "Four stainless screws and wall plugs",
  "pedestal_pole_width_pct": 18,
  "pedestal_base_depth_pct": 100,
  "sign_feet_base_depth_pct": 180,
  "sign_feet_post_height_pct": 10,
  "sign_feet_inset_pct": 15,
  "excluded_colour_ids": [
    3
  ],
  "excluded_backboard_ids": [
    11
  ],
  "base_price": 500,
  "price_multiplier": 1.2
}

Create a mounting

curl https://web.signcustomiser.com/api/v3/customisers/1/mountings \
  --request POST \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "visualisation": "screw",
  "letter_parts": [
    "top"
  ],
  "price_multiplier_target": "base_letter_price",
  "name": "Wall Screws",
  "description": "Four stainless screws and wall plugs",
  "pedestal_pole_width_pct": 18,
  "pedestal_base_depth_pct": 100,
  "sign_feet_base_depth_pct": 180,
  "sign_feet_post_height_pct": 10,
  "sign_feet_inset_pct": 15,
  "excluded_colour_ids": [
    3
  ],
  "excluded_backboard_ids": [
    11
  ],
  "base_price": 500,
  "price_multiplier": 1.2
}'

{
  "data": {
    "object": "mounting",
    "id": 8,
    "customiser_id": 42,
    "name": "Wall Screws",
    "description": null,
    "visualisation": "screw",
    "pedestal_pole_width_pct": null,
    "pedestal_base_depth_pct": null,
    "sign_feet_base_depth_pct": null,
    "sign_feet_post_height_pct": null,
    "sign_feet_inset_pct": null,
    "letter_parts": [],
    "excluded_colour_ids": [],
    "excluded_backboard_ids": [],
    "base_price": 0,
    "currency": "USD",
    "price_multiplier": 1,
    "price_multiplier_target": "base_letter_price",
    "sort_order": 1,
    "image_url": null,
    "button_image_url": null,
    "created_at": "2026-08-13T00:00:00Z",
    "updated_at": "2026-08-13T00:00:00Z"
  },
  "links": {
    "self": "https://web.signcustomiser.com/api/v3/customisers/42/mountings/8",
    "documentation": "https://www.signcustomiser.com/help/api/"
  },
  "meta": {
    "api_version": "v3",
    "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
  }
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/missing_idempotency_key",
  "title": "Missing idempotency key",
  "status": 400,
  "code": "missing_idempotency_key",
  "detail": "Provide an Idempotency-Key header for this write.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "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.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "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.",
  "required_scopes": [
    "customisers:write"
  ],
  "granted_scopes": [
    "customisers:read"
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "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"
}

{
  "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.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/request_too_large",
  "title": "Request too large",
  "status": 413,
  "code": "request_too_large",
  "detail": "The request body must not exceed 2 MiB.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/validation_failed",
  "title": "Validation failed",
  "status": 422,
  "code": "validation_failed",
  "detail": "The screw visualisation is not drawn from pedestal_pole_width_pct, so the value would never be read. Omit the field, or set the visualisation that reads it.",
  "errors": [
    {
      "pointer": "/pedestal_pole_width_pct",
      "code": "field_not_used_by_visualisation",
      "detail": "The pedestal_pole_width_pct field is not used by this mounting's visualisation."
    }
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "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.",
  "retry_after": 37,
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}