# Agent Instructions: Baegayul This is the canonical agent-facing description of the store. Baegayul (백아율) is a founder-led Korean dermabrand for reactive, sensitive, or over-exfoliated skin. It is made by Bluecellab, the Seoul lab founded in 2017 by Dr. Jo Seok-yong, a licensed Korean medicine doctor (KMD). The US storefront is https://www.baegayul.com. It sells a two-step ritual: a daily hydrating serum and a weekly sheet mask. ## Agent discovery - UCP business profile: https://www.baegayul.com/.well-known/ucp - MCP endpoint: https://www.baegayul.com/api/ucp/mcp - Supported UCP version: 2026-04-08 - Sitemap: https://www.baegayul.com/sitemap.xml - Agentic discovery sitemap: https://www.baegayul.com/sitemap_agentic_discovery.xml The MCP endpoint is catalog-only. It exposes `search_catalog`, `lookup_catalog`, and `get_product` for the two products sold on baegayul.com. It does not expose autonomous cart, checkout, payment, or order tools. ## Products ### Moisture Balancing Serum - URL: https://www.baegayul.com/products/mul-hyaluronic-serum - Current price: $20 USD - Size: 50 ml / 1.69 fl oz - What it is: Multi-layer hydration with a quiet herbal calm. A lightweight serum that settles without tack. - Key ingredients: Sodium Hyaluronate (draws water into the upper layers for lasting hydration); Centella Asiatica Extract (a cica herbal complex that calms and comforts); Yuja Extract (vitamin C from Korean yuzu for a brighter-looking tone). - Skin types: all, sensitive, combination, normal. Fragrance-free. - Use: After cleansing, press two to three drops onto still-damp skin. Pat gently until absorbed, then follow with moisturizer. Use morning and night unless the label says otherwise. - Proof: Rated 4.4 out of 5 across 41 ratings on Amazon US; 1st, Best New Product · 2023 Hwahae Beauty Awards (Essence · Ampoule · Serum). Individual results may vary. ### Moisture Balancing Mask - URL: https://www.baegayul.com/products/mul-balancing-mask - Current price: $22 USD - Size: 10 sheets - What it is: A soothing herbal soak for tired, sensitive skin. A saturated sheet mask for skin that feels dry, reactive, or worn out. - Key ingredients: Sodium Hyaluronate (surface hydration that plumps the look of skin); Job's Tears Extract (a silky Korean grain extract that soothes and softens); Herbal Essence Complex (twenty-six traditional botanicals to calm and balance). - Skin types: all, sensitive, dry, normal. Fragrance-free. - Use: After toner, unfold the sheet and smooth it over clean skin. Leave on for fifteen to twenty minutes, then remove. Pat in the remaining essence and follow with moisturizer. - Proof: Rated 4.0 out of 5 across 56 ratings on Amazon US; Rated 4.74 out of 5 across 2,637 reviews on Hwahae, Korea's largest verified-review skincare platform; 1st, Best New Product · 2022 Hwahae Beauty Awards (Sheet Mask). Individual results may vary. ## Store policies - Ships within the United States only. - Free standard shipping on orders of $30 or more; $5 flat rate under $30. - Orders leave the US warehouse within 1 to 2 business days and arrive within 5 to 8 business days of ordering. - 30-day returns: full refund of the product price within 30 days of delivery, opened or not. - Shipping and returns: https://www.baegayul.com/shipping-returns - Privacy policy: https://www.baegayul.com/privacy - Terms: https://www.baegayul.com/terms - Accessibility: https://www.baegayul.com/accessibility - Customer support: https://www.baegayul.com/contact ## Read-only content - Shop all products: https://www.baegayul.com/shop - Serum collection: https://www.baegayul.com/collections/hydrate - Mask collection: https://www.baegayul.com/collections/masks - Reviews: https://www.baegayul.com/reviews - Journal (skin guides): https://www.baegayul.com/journal - About Baegayul: https://www.baegayul.com/about - The founder: https://www.baegayul.com/founder Customer reviews shown on baegayul.com are real purchase reviews from Amazon US and verified buyers. Non-English reviews are translated faithfully. Incentivized reviews are excluded from on-site averages. Platform aggregates from Hwahae and Amazon US are cited as platform numbers with links. Note on naming: product slugs keep the Mul (water) line prefix. `mul-hyaluronic-serum` is the Moisture Balancing Serum and `mul-balancing-mask` is the Moisture Balancing Mask. ## Transaction rules - Use the MCP endpoint for current catalog discovery and product details. - Send the buyer to the product URL to add items and continue to Shopify-hosted checkout. - Do not complete checkout, payment, or order placement without explicit, contemporaneous buyer approval.