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Stablecoin payments, on-chain confirmations, webhooks, agent payment automation, and product updates.

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Guides
2026-07-106 min read

Create a hosted USDC Checkout Session in Next.js, redirect securely, and fulfill only from verified webhooks.

Next.js
USDC
Hosted Checkout
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Compare MCP and x402, learn how agents discover and call paid tools, and add policy, budgets, approvals, and constrained signing for production use.

MCP
x402
AI agent payments
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Engineering
2026-09-059 min read

Learn why AI agent payment safety needs scoped policies, exact approvals, constrained signing, idempotent retries, and budgets—not spending caps alone.

AI agent payments
Payment security
Stablecoins
x402
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Learn why production stablecoin payments need explicit order states, deterministic transfer matching, finality tracking, idempotency, and reliable webhooks.

Stablecoin payments
Payment architecture
Distributed systems
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Learn how to refund finalized stablecoin payments with verified addresses, exact amounts, signed transactions, idempotent webhooks, and on-chain reconciliation.

Stablecoin payments
Payment refunds
Payment operations
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Discover trusted x402 services for AI agents in the StableOps directory, compare live payment details and usage signals, or submit your own paid API for review.

x402 service directory
AI agent APIs
Paid APIs
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Learn how crypto deposit monitoring uses unique addresses, finality, idempotent webhooks, and reconciliation to credit customer deposits safely.

Stablecoin payments
Deposit monitoring
Trading infrastructure
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Build AI agent payments with buyer-side policies, budgets, approvals, and customer-controlled signing, plus seller-side payment orders, finality, webhooks, and reconciliation.

AI agent payments
Stablecoin payments
x402
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Learn how to test crypto payments with a sandbox, testnet USDC, webhook fixtures, and a pre-launch checklist—without risking real money.

Stablecoin payments
Payment testing
Testnets
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Learn crypto payment reconciliation across business orders, payment events, and on-chain transfers with a safe script and daily and monthly checklists.

Stablecoin payments
Payment reconciliation
Payment operations
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An underpaid crypto payment, overpayment, wrong-network transfer, or late payment should never silently complete an order. Learn how to detect, resolve, and prevent each mismatch.

Stablecoin payments
Payment operations
Payment exceptions
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