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SBC vs USDC and USDT
Why builders choose SBC for gasless payments and AI agent use cases — not generic stablecoin transfers.
SBC is a fiat-backed stablecoin built for developers shipping gasless payments, account abstraction, and x402 micropayments. USDC and USDT are widely held dollar stablecoins optimized for liquidity and general transfers — not agent-native HTTP payments or bundled paymaster infrastructure.
Comparison
| Topic | SBC | USDC | USDT |
|---|---|---|---|
| Primary use case | Developer-first stablecoin for gasless app payments and AI agent APIs (x402, AppKit, paymaster). | General-purpose dollar stablecoin — transfers, DeFi, CEX liquidity. | General-purpose dollar stablecoin — trading and remittance at scale. |
| Gasless transactions | Native ERC-4337 paymaster + bundler — users send SBC without holding ETH for gas. | Requires separate gas token on each chain; gasless via third-party paymasters only. | Same as USDC — gas paid in native chain token unless integrated separately. |
| AI agent payments | x402 HTTP 402 micropayments, machine-readable OpenAPI + /auth.md for autonomous clients. | No native HTTP payment protocol; agents need custom wallet integrations. | No native HTTP payment protocol; agents need custom wallet integrations. |
| Account abstraction | SBC AppKit — useSbcPara, smart accounts, sponsored UserOperations out of the box. | Wallet-level only; AA requires separate SDK (e.g. Coinbase Smart Wallet). | Wallet-level only; AA requires separate infrastructure. |
| Integration surface | OpenAPI at /openapi.json, API catalog, MassPay, Swap, paymaster RPC, 12+ networks. | Circle API, CCTP bridges — no unified gasless + x402 developer hub. | Exchange and chain contracts — no unified developer paymaster hub. |
When to use SBC
- Gasless SBC transfers in your app (ERC-4337 paymaster)
- AI agents paying for APIs via x402 HTTP 402
- Batch payouts with MassPay or swaps via swap.stablecoin.xyz
- Multi-network stablecoin payments (Base, Radius, Solana, Canton, and more)
Get started
SBC tools · OpenAPI · Agent auth · SBC docs