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If your app uses Gateway to source unified USDC liquidity across chains and mint on a destination, you've probably been polling to know when deposits finalize and mints land. You can now subscribe to those events directly and react in real time.

 — fires after a deposit into a Gateway Wallet is finalized onchain

 — fires after tokens are minted on the destination chain

 — fires when a forwarded mint relay is confirmed (forwarding service flows only)

. On instant-finality chains, forwarded transfers move straight from pending to finalized and skip the confirmed state — using both events together gives you a consistent view across chains.

Trigger destination-chain logic the moment funds land, not on the next poll tick

Drive UI state from real events instead of best-effort polling

Cut backend load and the latency budget spent on state-check loops

Gateway itself stays permissionless. Webhooks require a free Circle Developer Console account — no billing or credit card.

Delivery is at-least-once. Store each notification ID and skip duplicates.

 to subscribe to all event types, including any added later.

Works on testnet and mainnet from the same account.

Setup is two steps: expose an HTTPS endpoint, then create a subscription with your wallet addresses, chains, and event types.

https://developers.circle.com/gateway/webhooks

If you're building Arc-related flows on Gateway, which event are you most likely to wire up first — deposit, mint, or forwarded?

Gateway now supports webhooks, useful if you're moving USDC across chains in Arc-related flows.

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