Building with programmable money on Arc using App Kit

on YouTube ↗26m

" summary

App Kit is a TypeScript SDK that bundles CCTP and Gateway plus USDC, EURC and cbBTC support to cut common flows from hundreds of lines to a few: cross‑chain sends in ~4 lines, unified balances from ~300 lines to five, and swaps/payouts in under five lines. It runs on Arc testnet (Arc mainnet coming soon) with ~$15,000 in hackathon bounties, offers monetization via basis‑points parameter paid out by Circle smart contracts, and demos a deposit $5 and payout with subsecond finality and a $1 nano‑payment to an API.

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" chapters (38)

1. 0:00Introduction
2. 0:11What Is Arc and the Bounties
3. 0:39The Tools Circle Built for Developers
4. 1:08The Problem: Building for Multi-Chain Flows
5. 1:36Why the World Will Be Multi-Chain
6. 2:09Reducing Fragmentation With CCTP and Gateway
7. 2:51What Is App Kit
8. 3:32Shipping Patterns Fast With Built-In Monetization
9. 4:09Powered by Circle Smart Contracts
10. 4:38Bring Your Own Wallet or Use Circle's
11. 5:15Common Flow: Bridging for Neobanks
12. 5:40Common Flow: Payouts and Invoicing
13. 5:59Common Flow: Swaps and Onchain FX
14. 7:40How the Virtual Balance Works
15. 8:08From 300 Lines of Code to Five
16. 8:40Simple Sends With Built-In RPC
17. 9:10Why Choose App Kit and Arc
18. 11:04What a Cross-Chain Request Looks Like
19. 11:27Adding Monetization With a Parameter
20. 11:52The Unified Balance Experience
21. 12:40Switching to a Live Demo
22. 13:07Depositing Into the Gateway Balance
23. 13:57Doing a Payout From Arc to Base
24. 15:49Confirming the Funds Arrived
25. 16:20Why Arc Makes It Faster
26. 16:40Introducing the Circle Agent Stack
27. 17:12What the CLI Enables
28. 17:43Dropping the Agent Stack Into a Harness
29. 18:05Self-Custodial Wallets and Nano Payments
30. 18:42The Proceeds Tool Demo
31. 19:10Wrapping a Basketball Stats API
32. 19:36Making the Endpoint Profitable
33. 20:41Having Claude Call the Endpoint
34. 22:42Paying $1 and Getting the Scouting Report
35. 23:18How Proceeds Tracks Nano Payments
36. 24:00Q&A: When Does Arc Launch
37. 24:20Q&A: The Use Cases That Excite Him Most
38. 25:25Closing

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