# POST Create a font tier Adds a font tier to the customiser. Only `name` is required; every other field has a documented default (`letter_pricing_mode` every_letter_cost, `rows` empty). Each row's `size_id` must name one of the customiser's own sizes, and carries a `base_price` and a `letter_price` map keyed `line_1` … `line_10` in integer minor units. `line_1` to `line_3` are required in both maps, because the pricing document requires them of these same rows; a higher line the map omits is stored as no price for that line count. The customiser must price by `simple_letter` (or the legacy `legacy_fixed_height` model): a font tier on any other pricing model is unreachable, and the write is refused with a 422 `pricing_model_mismatch`. Requires `pricing:write` and an `Idempotency-Key`. The pricing document publishes the same tiers as its `price_lists` and its full replace deletes any tier the payload omits, so pick one surface per workflow rather than interleaving the two. 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`. - Source URL: https://www.signcustomiser.com/help/api/v3-post-create-a-font-tier/ - Markdown URL: https://www.signcustomiser.com/help/api/v3-post-create-a-font-tier.md - Group: Customiser font tiers - Method: POST - Path: /api/v3/customisers/{customiser_id}/font-tiers - Auth: Bearer token - Required scopes: `pricing:write` ## Path parameters - customiser_id (string, required): The customiser id. Example: 1 ## Body parameters - letter_pricing_mode (string, optional): No description provided. - name (string, optional): No description provided. - rows (array, optional): No description provided. ## Request body example ```json { "letter_pricing_mode": "every_letter_cost", "name": "Standard", "rows": [ { "size_id": 3, "base_price": { "line_1": 2500, "line_2": 3000, "line_3": 3500 }, "letter_price": { "line_1": 400, "line_2": 450, "line_3": 500 } } ] } ``` ## cURL example ```bash curl https://web.signcustomiser.com/api/v3/customisers/1/font-tiers \ --request POST \ --header 'Accept: application/json' \ --header 'Authorization: Bearer YOUR_API_TOKEN' \ --header 'Content-Type: application/json' \ --data '{ "letter_pricing_mode": "every_letter_cost", "name": "Standard", "rows": [ { "size_id": 3, "base_price": { "line_1": 2500, "line_2": 3000, "line_3": 3500 }, "letter_price": { "line_1": 400, "line_2": 450, "line_3": 500 } } ] }' ``` ## Response examples ### 201 POST 201 example 1 ```json { "data": { "object": "font_tier", "id": 7, "customiser_id": 42, "name": "Standard", "letter_pricing_mode": "every_letter_cost", "currency": "USD", "rows": [ { "size_id": 3, "base_price": { "line_1": 2500, "line_2": null, "line_3": null, "line_4": null, "line_5": null, "line_6": null, "line_7": null, "line_8": null, "line_9": null, "line_10": null }, "letter_price": { "line_1": 400, "line_2": null, "line_3": null, "line_4": null, "line_5": null, "line_6": null, "line_7": null, "line_8": null, "line_9": null, "line_10": null }, "letter_price_by_position": 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/font-tiers/7", "documentation": "https://www.signcustomiser.com/help/api/" }, "meta": { "api_version": "v3", "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t" } } ``` ### 400 Missing idempotency key ```json { "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" } ``` ### 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.", "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.", "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 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.", "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t" } ``` ### 413 Request body too large ```json { "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" } ``` ### 422 Wrong pricing model ```json { "type": "https://www.signcustomiser.com/help/api/problems/pricing_model_mismatch", "title": "Pricing model mismatch", "status": 422, "code": "pricing_model_mismatch", "detail": "A font tier is only priced by a simple_letter or legacy_fixed_height customiser, and this customiser prices by advanced_letter.", "errors": [ { "pointer": "", "code": "pricing_model_mismatch", "detail": "This customiser's pricing model does not use font tier rows." } ], "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t" } ``` ### 429 Option write budget exhausted ```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.", "retry_after": 37, "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t" } ```