Interactive XPayr checkout widget example with secure server-side session creation and popup, redirect, and embedded checkout modes.

Reference flow for policy-controlled agent decisions, agent-wallet execution, Arc Testnet USDC settlement, and XPAYR reconciliation.

XPAYR integration examples for Arc Testnet USDC checkout, transaction memos, App Kit workflows, and payment reconciliation.

Production-oriented examples for XPayr payment sessions, hosted checkout, webhooks, and testnet-first merchant integrations.

Secure webhook verification examples for XPayr, including raw-body HMAC validation, idempotency, retries, and durable processing patterns.

Official Postman collection and environments for exploring the XPayr Merchant API and testnet payment lifecycle.

Official Node.js SDK for creating XPayr payment sessions, verifying webhooks, and integrating direct-to-wallet crypto checkout.

Canonical payment-evidence envelopes, deterministic hashing, and Merkle inclusion proofs for independently verifiable XPayr receipts.

Runnable server-side example for creating USDT checkout sessions with XPayr while keeping merchant API keys out of the browser.

Read-only Arc Testnet reconciliation reference for XPAYR payment events, cursor checkpoints, deduplication, and RPC health monitoring.