Ungated Interactive Demo · Zero Signup Required

Experience XPayr Dual Checkout, Webhooks & HTTP 402 Live.

Inspect how XPayr processes Web3 1-Click Atomic Splits (99.5% / 0.5%), Binance/Bybit Exchange QR transfers, Modal Button Embeds, and Autonomous AI Agent Paywalls — complete with live REST API v1 payloads and signed HMAC-SHA256 webhook receipts.

Get Free sk_test_ API Keys 🤖 21-Tool MCP Playground OpenAPI 3.1 Playground Dual Checkout Specs
$0Sandbox & Testnet cost
99.5% / 0.5%Deterministic wallet split
6 secMulti-chain explorer loop
HMAC + ES256Cryptographic verification

1. Configure Test Payment Session

API v1 Session Creation Request


        


        

            
2. Live Checkout Runtime & Signed Webhook

            

                

                    

                        XPayr Dual Checkout · Testnet
                        
Atomic 99.5% Merchant / 0.5% XPayr Fee Split

                    

                    ● Ready to Pay
                


                

                    

                        Buyer Pays
                        100.00 USDC
                    

                    

                        XPayr Fee (0.5%)
                        $0.50
                    

                    

                        Your Wallet Receives
                        $99.50
                    

                


                

                    
1. Session
sess_test_9041

                    
2. Broadcast
Wallet / QR Tx

                    
3. Finality
On-chain receipt

                    
4. Webhook
HMAC 200 OK

                


                

                    Mode: Customer signs a single ERC-20 transfer/permit; smart contract routes 99.5% directly to your self-custodial wallet.
                

            


            
Delivered Webhook Payload (X-XPayr-Signature: sha256=...)

            

        

    


    

        

            AI Agents & IDEs
            
21-Tool Remote MCP Playground

            
Execute live JSON-RPC 2.0 tool calls against POST https://xpayr.com/api/mcp directly from your browser or connect Claude, Cursor, and VS Code.

            Open MCP Playground
        

        

            Signature Verification
            
Multi-Language HMAC Webhook Lab

            
Generate real HMAC-SHA256 signatures for payment.completed, payment.underpaid_accepted, and license.issued across Node, PHP, Python, and Go.

            Open Webhook Tester
        

        

            Chain Economics
            
Multi-Chain Gas & Finality Comparator

            
Benchmark network fees, block finality, and ERC-2612 gasless eligibility across Base, Arbitrum, Solana, TRON, Polygon, BSC, and Circle Arc.

            Compare 9 Chains
        

    


    

        
Live Sandbox & Testnet FAQ

                    

                Can I test XPayr checkout, webhooks, and MCP tools without a credit card or KYB call?
                
Yes. You can test interactive flows right here on /sandbox with zero registration, or open a free merchant workspace in 60 seconds to receive live sk_test_ API keys for Sepolia, Base Sepolia, BSC Testnet, Solana Devnet, Shasta TRON, and Circle Arc Testnet.

            

                    

                Does this browser sandbox match XPayr production API v1 and HMAC webhook payloads?
                
Yes. Every simulated request and callback on this page mirrors the exact POST /api/v1/payments request schema and X-XPayr-Signature HMAC-SHA256 webhook JSON structure documented at https://api-docs.xpayr.com.

            

                    

                How do Web3 1-Click Pay and Direct Exchange QR differ during live checkout?
                
Web3 1-Click Pay connects MetaMask, Rabby, Phantom, Coinbase Wallet, or TronLink to execute an atomic 99.5% / 0.5% smart-contract transfer. Direct Exchange QR displays a network-verified address and QR code for Binance, Bybit, or OKX withdrawals with 6-second explorer polling and 1% (max $0.50) fee tolerance.

            

                    

                How do I move from Sandbox testing to Mainnet production?
                
Register at /merchant/register, connect your non-custodial EVM, Solana, TRON, or BTC wallet addresses, verify one sk_test_ webhook callback, and enable Mainnet sk_live_ keys from your dashboard.