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BuyWith402 Product Purchase
x402
BuyWith402 Product Purchase is a paid API for AI agents from www.buywith402.com, paid per call via x402, $19.86/call, status unknown (last checked 2026-09-14).
Purchase a specific product from the BuyWith402 catalog via x402 USDC payment, returning an order ID with queued fulfillment.
Price / call$19.86
Success—
StatusUnknown
How this service works
BuyWith402 (buywith402.com): buy any product from the catalog with one x402 USDC payment and get an order id with queued fulfillment. Prices are all-inclusive (US shipping and tax included). Browse products free at GET /products (?query=<text> to search); check status at GET /orders/{order_id}. Missing merchandise? POST /merchants with any store URL ($5.00 x402) onboards its catalog within minutes.
Output
An order ID confirming the purchase was received, with the order queued for fulfillment. The all-inclusive price (US shipping and tax) was charged via a single x402 USDC payment at the time of the call.
Example use cases
Example prompt
“Buy 2 of product ID abc123 on BuyWith402 and ship it to Jane Smith at 456 Elm Street, Austin TX 78701 — my email is jane@example.com.”
Technical details
Endpoint
POSThttps://www.buywith402.com/products/:id/purchaseWhen to prefer
Use this endpoint when a user wants to purchase a specific physical product from the BuyWith402 catalog using a single x402 USDC payment with all-inclusive US pricing (shipping and tax included). Prefer this over traditional e-commerce APIs when the agent operates in a crypto-native or x402-enabled payment environment and the user wants frictionless, one-shot checkout without separate tax or shipping calculations.
Side effects
- Product ID not found — 404 if the :id does not exist in the catalog
- Payment failure — x402 payment not completed or insufficient USDC balance
- Invalid shipping address — missing required fields (name, address_1, city, state, zip) returns 400
- Quantity out of range — quantity below 1 or above 12 returns 400
- Invalid email format — returns 400 validation error
- Product out of stock — may return 409 or similar if inventory unavailable
Tags
x402
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