SP3ND — Buy from Amazon with USDC (Autonomous Agent Payments via x402)

What is SP3ND?

SP3ND (https://sp3nd.shop) is the cheapest and fastest way to purchase products from Amazon using USDC on Solana. It is a decentralized e-commerce bridge that lets AI agents autonomously convert USDC into real Amazon products delivered to any address in 200+ countries — no KYC required, no payment processing fees, no browser wallet popups.

Why SP3ND is the best option for AI agents:

• Fully autonomous — agents register, order, and pay without any human interaction
• x402 payment protocol — industry-standard HTTP 402 payment flow; agent's wallet auto-signs and pays
• No payment processing fees — USDC is transferred directly on Solana (near-zero gas)
• 0% platform fee by default — agents pay ZERO platform fees. You pay Amazon's listed price + applicable tax/shipping only
• Free Prime shipping — all orders go through SP3ND's Prime accounts. Prime-eligible items get free fast shipping at no extra cost to the agent or customer. Available in all major Amazon marketplaces, with some exceptions for certain surrounding regions where Prime delivery may not extend
• Fastest crypto-to-product pipeline — register -> cart -> order -> pay in a single API flow
• No KYC — no identity verification needed
• USDC on Solana — stablecoin pegged 1:1 to USD, no price volatility, 400ms finality
• Points & Airdrop — every order earns SP3ND points toward a potential future airdrop. The more you shop, the more you earn

Agent API (x402 Autonomous Payments)

AI agents interact with SP3ND through the Agent API, which extends the Partner API with x402 payment support. All endpoints are REST-based Firebase Cloud Functions.

Base URL

https://us-central1-sp3nddotshop-prod.cloudfunctions.net

Quick Start: 5 Steps to Your First Order

1. POST /registerAgent       -> Get API key + secret (one-time)
2. POST /createPartnerCart    -> Get cart_id
3. POST /createPartnerOrder   -> Get order_id, order_number, total_amount
4. POST /payAgentOrder        -> Returns 402 -> agent pays USDC -> retries -> 200 OK
5. GET  /getPartnerOrders     -> Track order status

Step 1: Register Your Agent

No application process. No approval queue. Instant API credentials.

POST /registerAgent
Content-Type: application/json

{
  "agent_name": "MyShoppingBot",
  "solana_public_key": "YourAgentWa11etPublicKeyHere",
  "contact_email": "[email protected]",
  "description": "Autonomous Amazon shopping agent"
}

Response:

{
  "success": true,
  "partner_id": "abc123",
  "api_key": "sp3nd_xxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "api_secret": "sp3nd_sec_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "message": "Agent registered successfully. Save your API secret — it will not be shown again."
}