# PATCH Update customiser pricing

Partially update the customiser's pricing with a JSON Merge Patch (RFC 7396) of the canonical document: the request body is a JSON object containing only the properties to change. Properties omitted from the patch are unchanged; a null value removes a property (for example `{"sheet_pricing": null}` removes the backing-sheet section); arrays are replaced wholesale — to change one size or price list row, send the complete new array (each entry carrying its size_id or price_list_id to update in place). A merge patch can never edit one array element by itself. The patched result is validated and persisted as a full replacement, so the field rules, read-only descriptor guards, deletion semantics, and error catalogue are exactly those of the replace operation; field semantics and per-model document shapes are documented on the read operation. An empty object `{}` is a valid no-op. Requires the `pricing:write` scope. A successful update immediately reprices the storefront: the customiser's cached configuration is invalidated and translated language content is resynchronised. 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`; keys are retained for at least 24 hours and are scoped to your credential, the HTTP method, and the path. A 422 problem with code `invalid_document` means the patch body is not a JSON object. All other failures match the replace operation: `validation_failed` (pointers into the patched document plus `allowed_values` on enum violations), `unknown_field`, `legacy_pricing_model`, 409 `resource_in_use`, 409 idempotency conflicts, 400 `malformed_json`, and 401/403/404/429.

- Source URL: https://www.signcustomiser.com/help/api/v3-patch-update-customiser-pricing/
- Markdown URL: https://www.signcustomiser.com/help/api/v3-patch-update-customiser-pricing.md
- Group: Pricing
- Method: PATCH
- Path: /api/v3/customisers/{customiser_id}/pricing
- Auth: Bearer token

## Path parameters

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

## Body parameters

- base_pricing (object, optional): No description provided.

## Request body example

```json
{
  "base_pricing": {
    "mode": "included_in_price_lists"
  }
}
```

## cURL example

```bash
curl https://web.signcustomiser.com/api/v3/customisers/1/pricing \
  --request PATCH \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "base_pricing": {
    "mode": "included_in_price_lists"
  }
}'
```

## Response examples

### 200 Patched document

```json
{
  "data": {
    "object": "customiser_pricing",
    "customiser_id": 42,
    "pricing_model": "simple_letter",
    "pricing_model_display_name": "Simple Letter",
    "currency": "USD",
    "sizes": [
      {
        "size_id": 7,
        "client_key": null,
        "name": "Small",
        "description": "Up to 50cm wide",
        "sort_order": 1,
        "char_limit": 20,
        "line_limit": 3,
        "min_char": 1,
        "width_cm": 50,
        "height_cm": null,
        "line_height_cm": 12,
        "width_multiplier": null,
        "length_cm": null,
        "sizing_strategy": "fixed_width",
        "height_measurement_mode": "line_height"
      }
    ],
    "base_pricing": {
      "mode": "included_in_price_lists",
      "rows": []
    },
    "price_lists": [
      {
        "price_list_id": 10,
        "name": "Standard",
        "rows": [
          {
            "size_id": 7,
            "size_key": null,
            "base_price": {
              "line_1": 1000,
              "line_2": 1200,
              "line_3": 1400
            },
            "letter_price": {
              "line_1": 100,
              "line_2": 120,
              "line_3": 140
            }
          }
        ]
      }
    ],
    "sheet_pricing": null
  },
  "links": {
    "self": "https://web.signcustomiser.com/api/v3/customisers/42/pricing",
    "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 pricing:write scope, but the API key grants the following scopes: pricing:read. Create a key that includes the required scope in the merchant admin under Integrate → API Tokens.",
  "required_scopes": [
    "pricing:write"
  ],
  "granted_scopes": [
    "pricing: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 Patch is not an object

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/invalid_document",
  "title": "Invalid document",
  "status": 422,
  "code": "invalid_document",
  "detail": "The merge patch must be a JSON object containing the pricing document properties to change (RFC 7396): omitted properties are unchanged, null removes a property, and arrays replace the current value wholesale.",
  "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": "/base_pricing",
      "code": "required",
      "detail": "The base pricing field is required."
    }
  ],
  "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"
}
```