{
  "openapi": "3.0.3",
  "info": {
    "title": "Skinique storefront API",
    "version": "2026-08-22",
    "description": "Public machine-readable surface of skinique.lv (Shopify storefront). Read endpoints need no authentication. Cart endpoints operate only on the caller's own session cart (cookie-scoped) - there is no cross-customer access and no privileged write surface here. Transactional agent commerce (catalog search, cart, checkout with mandatory buyer approval) is served via the Universal Commerce Protocol: discovery at /.well-known/ucp, MCP JSON-RPC at /api/ucp/mcp; tool schemas are published at https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json. Agent onboarding: /llms.txt and /agents.md. Locale-prefixed variants (/ru, /en) of HTML routes exist; the JSON endpoints below are locale-independent.",
    "contact": { "name": "Skinique", "url": "https://skinique.lv/pages/contact", "email": "info@skinique.lv" }
  },
  "externalDocs": { "description": "Agent instructions (llms.txt mirror at /agents.md); UCP discovery at /.well-known/ucp", "url": "https://skinique.lv/llms.txt" },
  "servers": [ { "url": "https://skinique.lv" } ],
  "security": [],
  "paths": {
    "/products.json": {
      "get": {
        "operationId": "listProducts",
        "summary": "List published products",
        "parameters": [
          { "name": "limit", "in": "query", "schema": { "type": "integer", "minimum": 1, "maximum": 250 }, "description": "Products per page (default 30, max 250)." },
          { "name": "page", "in": "query", "schema": { "type": "integer", "minimum": 1 } }
        ],
        "responses": {
          "200": { "description": "Product list", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ProductList" } } } }
        }
      }
    },
    "/products/{handle}.json": {
      "get": {
        "operationId": "getProduct",
        "summary": "One product by handle",
        "parameters": [ { "name": "handle", "in": "path", "required": true, "schema": { "type": "string" } } ],
        "responses": {
          "200": { "description": "Product", "content": { "application/json": { "schema": { "type": "object", "properties": { "product": { "$ref": "#/components/schemas/Product" } } } } } },
          "404": { "description": "Unknown handle. Content type is application/json; the body is empty." }
        }
      }
    },
    "/collections/{handle}/products.json": {
      "get": {
        "operationId": "listCollectionProducts",
        "summary": "Products in a collection",
        "parameters": [
          { "name": "handle", "in": "path", "required": true, "schema": { "type": "string" }, "description": "Collection handle; see /sitemap.xml for the full set." },
          { "name": "limit", "in": "query", "schema": { "type": "integer", "minimum": 1, "maximum": 250 } }
        ],
        "responses": {
          "200": { "description": "Product list (empty products array for an unknown collection handle on some Shopify versions; otherwise 404)", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ProductList" } } } },
          "404": { "description": "Unknown handle. Content type is application/json; the body is empty." }
        }
      }
    },
    "/search/suggest.json": {
      "get": {
        "operationId": "searchSuggest",
        "summary": "Predictive search",
        "parameters": [
          { "name": "q", "in": "query", "required": true, "schema": { "type": "string" } },
          { "name": "resources[type]", "in": "query", "schema": { "type": "string", "enum": ["product", "page", "article", "collection", "query"] }, "description": "Comma-separable resource types." }
        ],
        "responses": {
          "200": { "description": "Suggestions", "content": { "application/json": { "schema": { "type": "object", "properties": { "resources": { "type": "object" } } } } } }
        }
      }
    },
    "/cart.js": {
      "get": {
        "operationId": "getCart",
        "summary": "The caller's session cart",
        "security": [ { "cartSession": [] } ],
        "responses": {
          "200": { "description": "Cart (content type text/javascript, body is JSON)", "content": { "text/javascript": { "schema": { "$ref": "#/components/schemas/Cart" } } } }
        }
      }
    },
    "/cart/add.js": {
      "post": {
        "operationId": "addToCart",
        "summary": "Add variant(s) to the session cart",
        "security": [ { "cartSession": [] } ],
        "requestBody": {
          "required": true,
          "content": { "application/json": { "schema": { "type": "object", "required": ["items"], "properties": { "items": { "type": "array", "items": { "type": "object", "required": ["id"], "properties": { "id": { "type": "integer", "description": "Variant id (from product JSON variants[].id)" }, "quantity": { "type": "integer", "default": 1 } } } } } } } }
        },
        "responses": {
          "200": { "description": "Added items", "content": { "application/json": { "schema": { "type": "object" } } } },
          "422": { "description": "Cart error (unknown variant, sold out, quantity rules)", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/CartError" } } } }
        }
      }
    },
    "/.well-known/ucp": {
      "get": {
        "operationId": "ucpDiscovery",
        "summary": "Universal Commerce Protocol merchant profile",
        "description": "Shopify-served discovery document: supported UCP versions, service endpoints, capabilities, payment handlers. See https://ucp.dev.",
        "responses": { "200": { "description": "UCP profile", "content": { "application/json": { "schema": { "type": "object" } } } } }
      }
    },
    "/api/ucp/mcp": {
      "post": {
        "operationId": "ucpMcp",
        "summary": "UCP shopping service (MCP transport, JSON-RPC 2.0)",
        "description": "POST JSON-RPC 2.0. Start with method tools/list to discover tools (search_catalog, cart and checkout operations; get_checkout verified live). Payment completion always requires contemporaneous buyer approval - agents must not finalize payment autonomously. Rate-limited per IP: back off on 429. Authoritative contract: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json",
        "requestBody": { "required": true, "content": { "application/json": { "schema": { "type": "object", "required": ["jsonrpc", "id", "method"], "properties": { "jsonrpc": { "type": "string", "enum": ["2.0"] }, "id": {}, "method": { "type": "string" }, "params": { "type": "object" } } } } } },
        "responses": {
          "200": { "description": "JSON-RPC response (result or error object)", "content": { "application/json": { "schema": { "type": "object" } } } },
          "429": { "description": "Rate limited - back off" }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "cartSession": {
        "type": "apiKey",
        "in": "cookie",
        "name": "cart",
        "description": "Shopify session cart cookie, created automatically on first cart call. Scope: the caller's own cart only - no customer data, no order history, no admin surface. Checkout/payment is NOT reachable through these endpoints; transactional flows go through UCP/MCP (buyer approval enforced by the platform) or the Shop skill (https://shop.app/SKILL.md)."
      }
    },
    "schemas": {
      "Product": {
        "type": "object",
        "properties": {
          "id": { "type": "integer" },
          "title": { "type": "string" },
          "handle": { "type": "string" },
          "body_html": { "type": "string" },
          "vendor": { "type": "string" },
          "product_type": { "type": "string" },
          "tags": { "type": "array", "items": { "type": "string" }, "description": "Products tagged consultation_only cannot be added to the cart; the product page routes to a consultation request instead." },
          "variants": { "type": "array", "items": { "type": "object", "properties": { "id": { "type": "integer" }, "title": { "type": "string" }, "price": { "type": "string" }, "available": { "type": "boolean" } } } },
          "images": { "type": "array", "items": { "type": "object" } }
        }
      },
      "ProductList": {
        "type": "object",
        "properties": { "products": { "type": "array", "items": { "$ref": "#/components/schemas/Product" } } }
      },
      "Cart": {
        "type": "object",
        "properties": {
          "token": { "type": "string" },
          "item_count": { "type": "integer" },
          "items": { "type": "array", "items": { "type": "object" } },
          "total_price": { "type": "integer", "description": "Minor currency units (EUR cents)" },
          "currency": { "type": "string" }
        }
      },
      "CartError": {
        "type": "object",
        "required": ["status", "message", "description"],
        "properties": {
          "status": { "type": "integer", "example": 422 },
          "message": { "type": "string", "example": "Cart Error" },
          "description": { "type": "string", "example": "Cannot find variant", "description": "Human-readable resolution hint" }
        }
      }
    }
  }
}