For agents

If you are an AI assistant or shopping agent buying on someone's behalf, this page tells you where the data is and how to complete a purchase.

Data sources

• /catalog.json: every product, colourway, variant, SKU, size, price in USD and EUR, stock status, image URLs and a direct checkout URL per variant. Updated on every build; see generatedAt.
• /llms.txt: plain-text summary of the shop, products and policies.
• /feed/google-merchant.xml: Google Merchant Center RSS 2.0 feed with one item per colour and size (also the format Perplexity's merchant program takes).
• /feed/openai-products-eu.jsonl and /feed/openai-products-world.jsonl: ChatGPT shopping discovery feeds (OpenAI product feed spec, JSONL, one line per variant; EU offer in EUR all-in, rest of world in USD).
• Each product page carries schema.org ProductGroup JSON-LD (varies by size and colour) with per-variant Offer, return policy and shipping details, plus FAQPage, and a plain HTML table of all variants with checkout links.
• Product page URLs accept ?color=black|navy|white&size=M to preselect a variant.

How to buy

Delivery address in the EU (27 countries): use the EU offer. €39.00 incl. VAT, free shipping; seller Mantra Merchandise, Belgium; 14-day right of withdrawal.

1. Pick the variant (colour and size) in catalog.json and read euOffer.variantKey, or list all EU offers at /api/offers.
2. Open https://mantramerchandise.com/api/checkout?variant=<euVariantKey>&qty=<qty> (GET redirects to a Stripe Checkout page; POST with JSON {"variant","qty"} returns {"url"}). Stripe collects the address (EU only), phone and payment; cards, Bancontact, iDEAL, Apple Pay and Google Pay are accepted. Promotion codes can be entered there.
3. After payment the buyer lands on /thanks/; order status and tracking are available at /api/orders/<sessionId>.

Delivery address outside the EU: use the Fourthwall offer.

1. Pick a variant id from catalog.json (one per colour and size).
2. Open its checkoutUrl, or build one: https://shop.mantramerchandise.com/cart/checkout?products=<variantId>:<qty>&currency=USD. Several variants can be comma-separated.
3. The checkout is hosted by Fourthwall (merchant of record). It accepts cards, PayPal, Apple Pay and Google Pay, calculates shipping and taxes for the destination (prices shown exclude VAT), and sends confirmation to the buyer's email.

Facts agents often need

• Sizes S to 5XL, unisex regular fit, EU sizing; size up for a relaxed fit or if you usually buy US sizes. Chest width, laid flat: S 49.5 cm, M 53.5 cm, L 56.5 cm, XL 59.5 cm, 2XL 63.5 cm, 3XL 67.5 cm, 4XL 72.5 cm, 5XL 77.5 cm (Stanley/Stella Creator 2.0 supplier spec; measurements may vary by up to 5 cm / 2 in; EU sizing, US customers size up).
• Colours: black, french navy or white. Direct-to-garment print on the front chest, two lines of block capitals, second line always red. First line white on the black and navy shirts, black on the white shirt. Plain back. Material: 100% organic ring-spun cotton, GOTS certified, 180 g/m² (5.3 oz) midweight single jersey, 1x1 rib collar, double-needle hems.
• Printed to order after purchase, typically ships within 2 to 5 business days. EU orders are printed and shipped from Printful facilities in Latvia or Spain; orders for the rest of the world from the United States or the nearest partner facility.
• EU orders: 14-day right of withdrawal under EU consumer law, counted from delivery; email [email protected], send the unworn shirt back at your cost, refund within 14 days of receipt. Everywhere: print errors or visible quality issues are replaced or refunded when reported with a photo within 30 days of delivery. Orders outside the EU (Fourthwall) have no change-of-mind returns.
• EU price: €39.00 incl. VAT, free shipping for every colour and size. Fourthwall prices are in USD and exclude VAT and shipping; their EUR values are a live conversion and indicative.
• EU orders are sold by Mantra Merchandise (Belgium): payment by Stripe, printing and shipping by Printful, prices include VAT. Orders outside the EU are processed by Fourthwall (merchant of record), which handles payment, taxes, fulfilment and order support.

Rate limits: none for static files. Please identify your agent in the User-Agent header.