Simulate XPayr webhook events (including 1% underpayment tolerance & License Kit events), compute real-time X-XPayr-Signature HMAC-SHA256 digests, and copy verification code for Node.js, PHP, Python, Go, or MCP.
xpayr_generate_webhook_signature_test directly inside Claude Desktop, Cursor, or via POST https://xpayr.com/api/mcp to automate webhook QA in your CI/CD pipeline.
No. Everything runs locally in your browser using the Web Crypto API. You can copy the generated cURL command to dispatch the signed payload from your own terminal to localhost or staging.
At minimum, handle payment.completed, payment.underpaid_accepted (when within the 1% / max $0.50 USD exchange withdrawal tolerance), payment.failed, and license.issued for software licensing flows.
Yes. Both @xpayr/mcp-server and the remote endpoint https://xpayr.com/api/mcp provide the xpayr_generate_webhook_signature_test tool for automated QA.
Model your recurring 30% RevShare and CPA earnings across referred merchants and volume.
Fee savingsCompare your current processor cost with XPayr flat 0.5% gateway pricing.
Network choiceChoose the right stablecoin rail across TRON, Ethereum, Solana, Polygon, and BNB Chain.
Launch readinessScore whether your business is ready for links, widgets, API checkout, and mainnet review.
Settlement designModel accepted assets, preferred settlement asset, routing complexity, and operational controls.
Checkout previewWalk through session creation, wallet payment, confirmation, webhook, and reconciliation.
No-code embedCustomize an embeddable multi-chain crypto checkout button with live modal preview and HTML/React snippets.
AI Agent QAExecute live JSON-RPC 2.0 tool calls against https://xpayr.com/api/mcp and inspect all 21 AI agent tools.
Agent guardrailsModel per-tx limits, daily caps, auto-approval thresholds, and chain whitelists for autonomous AI commerce agents.
License Kit QASimulate cryptographic wallet-bound software licenses for extensions, plugins, and SaaS with @xpayr/extension-kit (v0.2.0).
Treasury payoutsModel non-custodial multi-recipient payouts (10 to 5,000 wallets), gas savings, and JSON manifests for XPayr Payout Hub.
Zero chargebacksCalculate annual profit lost to card chargebacks, $15-$25 dispute fees, and rolling reserves vs XPayr 0.5% non-custodial finality.
B2B invoicingBuild itemized B2B USDT/USDC invoices, preview 99.5% direct wallet splits, and copy ready-to-run API v1 & MCP session payloads.
Retail & POSSimulate in-person retail & hospitality counter bills with optional tips, instant QR checkout, and 0.5% split vs card FX fees.
CFO & ERP auditGenerate balanced QuickBooks CSV, Xero CSV, and NetSuite JSON journal entries with 99.5% / 0.5% splits and tx_hash proofs.
Exchange QR QAModel Binance/Bybit/OKX withdrawal fee deductions against XPayr 1% (max $0.50) tolerance and preview underpaid_accepted webhooks.
9-Chain BenchmarkRank Base, Arbitrum, Optimism, Polygon, Solana, BNB Chain, TRON TRC-20, Ethereum, and Circle Arc by gas cost, finality, and 99.5% net take-home.
8-Stack CodegenGenerate zero-placeholder checkout, HMAC-SHA256 webhook, HTTP 402 paywall, and ES256 license snippets across 8 stacks (Node.js, Python, PHP, Go, Rust, Ruby, Next.js, cURL).
HTTP 402 & AI APIsDesign 402 Payment Required machine paywalls, /.well-known/x402.json manifests, and offline ES256 JWKS middleware for Express, Next.js, FastAPI, and Cloudflare Workers.
On-Chain Split AuditInspect exact token integer base units, Rabby/MetaMask balance simulation deltas, and Transfer event logs vs custodial deposit-sweep gas costs.
SaaS Retention ROIQuantify annual ARR rescued from cross-border card declines, 3.9%+ FX/MoR fees, and subscription disputes by adding XPayr 0.5% USDC/USDT billing.
15-Min Provider SwitchConvert NOWPayments, Coinbase Commerce, BitPay, Cryptomus, CoinPayments, or Stripe Crypto payloads into XPayr REST v1 JSON and HMAC-SHA256 middleware.
CFO & Multisig SecurityMap 99.5% direct settlement into Safe{Wallet}, Solana Squads v4, Ledger cold storage, and Fireblocks MPC vaults with L2 contract checks and $0 sweep gas.
MiCA & Regional RailsMatch EEA/EU MiCA, UK, US, APAC, LATAM, and MENA buyer corridors to optimal EURC, USDC, USDT, PYUSD, and RLUSD non-custodial rails.
Gasless EIP-712 QAGenerate canonical EIP-712 domain separators, contract versions, and off-chain Permit payloads for USDC, EURC, PYUSD, and DAI across 7 gasless networks.
16-Chain Finality SLACalculate optimal confirmation depth, zero-conf mempool policies, and webhook latency across Sui, Aptos, Solana, NEAR, Base, Arbitrum, TRON, XRPL, ETH, and BTC.
Checkout CRO LiftQuantify annual GMV rescued by combining in-page modals, ERC-2612 Gasless Permit, and 1% (max $0.50) Direct Exchange QR underpayment tolerance.
XPayr · Built on Arc NetworkEstimate an Arc Testnet transaction budget in USDC using the gas inputs you provide. This XPayr tool is a planner, not a Mainnet quote.
XPayr · Built on Arc NetworkPlan a USDC route into or out of Arc Testnet, separate the bridge amount from the XPayr operation fee and continue to wallet-signed execution.
XPayr · Built on Arc NetworkPreview a same-chain stablecoin conversion, slippage budget and XPayr operation fee before requesting an executable quote.
@xpayr/mcp-serverAll form inputs on this tool automatically sync to the page URL query string for one-click team sharing or autonomous AI execution.