--- name: purch-api description: | AI-powered shopping API for product search and crypto checkout. Use this skill when: - Searching for products from Amazon and Shopify - Building shopping assistants or product recommendation features - Creating purchase orders with crypto (USDC on Solana or Base) - Integrating e-commerce checkout into applications - Signing and submitting blockchain transactions for purchases --- # Purch Public API Base URL: `https://api.purch.xyz` ## Rate Limits 60 requests/minute per IP. Headers in every response: - `X-RateLimit-Limit`: Max requests per window - `X-RateLimit-Remaining`: Requests left - `X-RateLimit-Reset`: Seconds until reset ## Endpoints ### GET /search - Structured Product Search Query products with filters. ```bash curl "https://api.purch.xyz/search?q=headphones&priceMax=100" ``` **Parameters:** | Param | Type | Required | Description | |-------|------|----------|-------------| | q | string | Yes | Search query | | priceMin | number | No | Minimum price | | priceMax | number | No | Maximum price | | brand | string | No | Filter by brand | | page | number | No | Page number (default: 1) | **Response:** ```json { "products": [ { "id": "B0CXYZ1234", "title": "Sony WH-1000XM5", "price": 348.00, "currency": "USD", "rating": 4.8, "reviewCount": 15420, "imageUrl": "https://...", "productUrl": "https://amazon.com/dp/B0CXYZ1234", "source": "amazon" } ], "totalResults": 20, "page": 1, "hasMore": true } ``` ### POST /shop - AI Shopping Assistant Natural language product search. Returns 20+ products from both Amazon and Shopify. ```bash curl -X POST "https://api.purch.xyz/shop" \ -H "Content-Type: application/json" \ -d '{"message": "comfortable running shoes under $100"}' ``` **Request Body:** ```json { "message": "comfortable running shoes under $100", "context": { "priceRange": { "min": 0, "max": 100 }, "preferences": ["comfortable", "breathable"] } } ``` **Response:** ```json { "reply": "Found 22 running shoes. Top pick: Nike Revolution 6 at $65...", "products": [ { "asin": "B09XYZ123", "title": "Nike Revolution 6", "price": 65.00, "currency": "USD", "rating": 4.5, "reviewCount": 8420, "imageUrl": "https://...", "productUrl": "https://amazon.com/dp/B09XYZ123", "source": "amazon" }, { "asin": "gid://shopify/p/abc123", "title": "Allbirds Tree Runners", "price": 98.00, "source": "shopify", "productUrl": "https://allbirds.com/products/tree-runners", "vendor": "Allbirds" } ] } ``` ### POST /buy - Create Purchase Order Create an order and get a transaction to sign. **Chain is auto-detected from wallet format:** - Solana wallet (base58): `7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU` - Base/EVM wallet (0x): `0x1234567890abcdef1234567890abcdef12345678` **Amazon Products (Solana)**: ```bash curl -X POST "https://api.purch.xyz/buy" \ -H "Content-Type: application/json" \ -d '{ "asin": "B0CXYZ1234", "email": "buyer@example.com", "walletAddress": "7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU", "shippingAddress": { "name": "John Doe", "line1": "123 Main St", "line2": "Apt 4B", "city": "New York", "state": "NY", "postalCode": "10001", "country": "US", "phone": "+1-555-123-4567" } }' ``` **Amazon Products (Base)**: ```bash curl -X POST "https://api.purch.xyz/buy" \ -H "Content-Type: application/json" \ -d '{ "asin": "B0CXYZ1234", "email": "buyer@example.com", "walletAddress": "0x1234567890abcdef1234567890abcdef12345678", "shippingAddress": { "name": "John Doe", "line1": "123 Main St", "city": "New York", "state": "NY", "postalCode": "10001", "country": "US" } }' ``` **Shopify Products** - Use `productUrl` AND `variantId`: ```bash curl -X POST "https://api.purch.xyz/buy" \ -H "Content-Type: application/json" \ -d '{ "productUrl": "https://store.com/products/item-name", "variantId": "41913945718867", "email": "buyer@example.com", "walletAddress": "7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU", "shippingAddress": { "name": "John Doe", "line1": "123 Main St", "city": "New York", "state": "NY", "postalCode": "10001", "country": "US" } }' ``` **Response:** ```json { "orderId": "550e8400-e29b-41d4-a716-446655440000", "status": "awaiting-payment", "serializedTransaction": "NwbtPCP62oXk5fmSrgT...", "product": { "title": "Sony WH-1000XM5", "imageUrl": "https://...", "price": { "amount": "348.00", "currency": "usdc" } }, "totalPrice": { "amount": "348.00", "currency": "usdc" }, "checkoutUrl": "https://www.crossmint.com/checkout/550e8400..." } ``` ## CLI Scripts This skill includes ready-to-use CLI scripts for all endpoints. Available in Python and TypeScript/Bun. **Dependencies (Solana):** ```bash # Python pip install solana solders base58 # TypeScript/Bun bun add @solana/web3.js bs58 ``` **Dependencies (Base/EVM):** ```bash # TypeScript/Bun bun add viem ``` ### Search Products ```bash # Python python scripts/search.py "wireless headphones" --price-max 100 python scripts/search.py "running shoes" --brand Nike --page 2 # TypeScript bun run scripts/search.ts "wireless headphones" --price-max 100 ``` ### AI Shopping Assistant ```bash # Python python scripts/shop.py "comfortable running shoes under $100" # TypeScript bun run scripts/shop.ts "wireless headphones with good noise cancellation" ``` ### Create Order (without signing) ```bash # Amazon by ASIN python scripts/buy.py --asin B0CXYZ1234 --email buyer@example.com \ --wallet 7xKXtg... --address "John Doe,123 Main St,New York,NY,10001,US" # Shopify product bun run scripts/buy.ts --url "https://store.com/products/item" --variant 41913945718867 \ --email buyer@example.com --wallet 7xKXtg... --address "John Doe,123 Main St,NYC,NY,10001,US" ``` Address format: `Name,Line1,City,State,PostalCode,Country[,Line2][,Phone]` ### Create Order AND Sign Transaction (Solana) End-to-end purchase flow - creates order and signs/submits the Solana transaction: ```bash # Python python scripts/buy_and_sign.py --asin B0CXYZ1234 --email buyer@example.com \ --wallet 7xKXtg... --private-key 5abc123... \ --address "John Doe,123 Main St,New York,NY,10001,US" # TypeScript bun run scripts/buy_and_sign.ts --url "https://store.com/products/item" --variant 41913945718867 \ --email buyer@example.com --wallet 7xKXtg... --private-key 5abc123... \ --address "John Doe,123 Main St,NYC,NY,10001,US" ``` ### Create Order AND Sign Transaction (Base) End-to-end purchase flow using Base/EVM wallet: ```bash bun run scripts/buy_and_sign_base.ts --asin B0CXYZ1234 --email buyer@example.com \ --wallet 0x1234567890abcdef1234567890abcdef12345678 \ --private-key 0xabc123... \ --address "John Doe,123 Main St,New York,NY,10001,US" ``` ### Sign Transaction Only (Solana) If you already have a `serializedTransaction` from the `/buy` endpoint: ```bash # Python python scripts/sign_transaction.py "" "" # TypeScript bun run scripts/sign_transaction.ts "" "" ``` ### Sign Transaction Only (Base) ```bash bun run scripts/sign_transaction_base.ts "" "" ``` **Output (Solana):** ``` ✅ Transaction successful! Signature: 5UfgJ3vN... Explorer: https://solscan.io/tx/5UfgJ3vN... ``` **Output (Base):** ``` ✅ Transaction successful! Hash: 0x1234... Explorer: https://basescan.org/tx/0x1234... ``` ## Signing Transactions Programmatically For custom integrations without using the bundled scripts: ### JavaScript/TypeScript ```typescript import { Connection, Transaction, clusterApiUrl } from "@solana/web3.js"; import bs58 from "bs58"; async function signAndSendTransaction( serializedTransaction: string, wallet: { signTransaction: (tx: Transaction) => Promise } ) { // Decode the base58 transaction const transactionBuffer = bs58.decode(serializedTransaction); const transaction = Transaction.from(transactionBuffer); // Sign with user's wallet (e.g., Phantom, Solflare) const signedTransaction = await wallet.signTransaction(transaction); // Send to Solana network const connection = new Connection(clusterApiUrl("mainnet-beta")); const signature = await connection.sendRawTransaction( signedTransaction.serialize() ); // Confirm transaction await connection.confirmTransaction(signature, "confirmed"); return signature; } ``` ### React with Wallet Adapter ```typescript import { useWallet, useConnection } from "@solana/wallet-adapter-react"; import { Transaction } from "@solana/web3.js"; import bs58 from "bs58"; function CheckoutButton({ serializedTransaction }: { serializedTransaction: string }) { const { signTransaction, publicKey } = useWallet(); const { connection } = useConnection(); const handlePayment = async () => { if (!signTransaction || !publicKey) { throw new Error("Wallet not connected"); } // Decode and sign const tx = Transaction.from(bs58.decode(serializedTransaction)); const signed = await signTransaction(tx); // Send and confirm const sig = await connection.sendRawTransaction(signed.serialize()); await connection.confirmTransaction(sig, "confirmed"); console.log("Payment complete:", sig); }; return ; } ``` ### Python (with solana-py) ```python import base58 from solana.rpc.api import Client from solana.transaction import Transaction from solders.keypair import Keypair def sign_and_send(serialized_tx: str, keypair: Keypair) -> str: # Decode base58 transaction tx_bytes = base58.b58decode(serialized_tx) transaction = Transaction.deserialize(tx_bytes) # Sign transaction.sign(keypair) # Send client = Client("https://api.mainnet-beta.solana.com") result = client.send_transaction(transaction) return result.value # transaction signature ``` ## Signing Base/EVM Transactions For Base chain orders, the `serializedTransaction` is an EVM transaction that needs to be signed with an EVM wallet. ### TypeScript with viem ```typescript import { createWalletClient, http, parseTransaction } from "viem"; import { base } from "viem/chains"; import { privateKeyToAccount } from "viem/accounts"; async function signAndSendBaseTransaction( serializedTransaction: string, privateKey: `0x${string}` ) { const account = privateKeyToAccount(privateKey); const client = createWalletClient({ account, chain: base, transport: http(), }); // Parse and send the serialized transaction const tx = parseTransaction(serializedTransaction as `0x${string}`); const hash = await client.sendTransaction(tx); console.log("Transaction hash:", hash); console.log("Explorer: https://basescan.org/tx/" + hash); return hash; } ``` ### React with wagmi ```typescript import { useSendTransaction } from "wagmi"; import { parseTransaction } from "viem"; function CheckoutButton({ serializedTransaction }: { serializedTransaction: string }) { const { sendTransaction } = useSendTransaction(); const handlePayment = async () => { const tx = parseTransaction(serializedTransaction as `0x${string}`); sendTransaction(tx); }; return ; } ``` ## Complete Checkout Flow (Solana) ```typescript // 1. Search for products const searchResponse = await fetch("https://api.purch.xyz/shop", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ message: "wireless headphones under $100" }) }); const { products, reply } = await searchResponse.json(); // 2. User selects a product, create order (Solana wallet) const orderResponse = await fetch("https://api.purch.xyz/buy", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ asin: products[0].asin, email: "buyer@example.com", walletAddress: wallet.publicKey.toBase58(), // Solana address shippingAddress: { name: "John Doe", line1: "123 Main St", city: "New York", state: "NY", postalCode: "10001", country: "US" } }) }); const { orderId, serializedTransaction, checkoutUrl } = await orderResponse.json(); // 3. Sign and send Solana transaction const tx = Transaction.from(bs58.decode(serializedTransaction)); const signed = await wallet.signTransaction(tx); const signature = await connection.sendRawTransaction(signed.serialize()); await connection.confirmTransaction(signature, "confirmed"); console.log(`Order ${orderId} paid. Tx: ${signature}`); ``` ## Complete Checkout Flow (Base) ```typescript import { parseTransaction } from "viem"; // 1. Search for products const searchResponse = await fetch("https://api.purch.xyz/shop", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ message: "wireless headphones under $100" }) }); const { products } = await searchResponse.json(); // 2. User selects a product, create order (EVM wallet) const orderResponse = await fetch("https://api.purch.xyz/buy", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ asin: products[0].asin, email: "buyer@example.com", walletAddress: "0x1234...", // Base/EVM address - chain auto-detected shippingAddress: { name: "John Doe", line1: "123 Main St", city: "New York", state: "NY", postalCode: "10001", country: "US" } }) }); const { orderId, serializedTransaction } = await orderResponse.json(); // 3. Sign and send Base transaction const tx = parseTransaction(serializedTransaction as `0x${string}`); const hash = await walletClient.sendTransaction(tx); console.log(`Order ${orderId} paid. Tx: ${hash}`); ``` ## Fallback: Browser Checkout If wallet signing fails or isn't available, redirect to `checkoutUrl` for browser-based payment: ```typescript if (!wallet.connected) { window.open(checkoutUrl, "_blank"); } ``` ## Error Handling All endpoints return errors as: ```json { "code": "VALIDATION_ERROR", "message": "Invalid email format", "details": { "field": "email" } } ``` Common error codes: - `VALIDATION_ERROR` (400) - Invalid request parameters - `NOT_FOUND` (404) - Product not found - `RATE_LIMITED` (429) - Too many requests - `INTERNAL_ERROR` (500) - Server error

agentic-commerce

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