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Build USDC subscription payments with recurring invoices, payer-initiated checkout, and verified subscription settlement events.

Accept USDT payments with chain-specific instructions, exact order matching, confirmation tracking, and verified webhook fulfillment.

Build reliable crypto payment webhook handling with raw-body signature verification, event deduplication, idempotent fulfillment, and replay-safe recovery.

Accept USDC payments into merchant-controlled wallets with payment orders, chain monitoring, finality, and reliable webhook fulfillment.

Compare custodial gateways, direct wallet transfers, and non-custodial payment infrastructure for reliable stablecoin collection.

A practical model for confirmations, reorgs, finality, and merchant fulfillment.