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Developer Guides

Developer Guides

Hands-on, step-by-step integration guides for building with Across Protocol.

Available Guides

Integrate Across Swap API

Build a complete crosschain bridge from scratch — discover chains, look up tokens, get a quote, and execute a USDC transfer from Arbitrum to Base using viem.

Crosschain Deposit into Aave

Bridge USDC from Arbitrum to Ethereum, swap it to ETH, and deposit directly into Aave's lending pool — all in a single user transaction using embedded actions.

ERC-7683 in Production

Submit crosschain intents using the ERC-7683 standard via AcrossOriginSettler.

Integrate Across Swap API

Build a complete crosschain USDC bridge from scratch — discover chains, look up tokens, get a quote, and execute with viem.

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Available Guides