The Portals DeFi API is Now Cross-Chain

Don't confine your dApp to a single network. One integration opens your protocol to cross-chain liquidity and users across EVM chains.

A user finds your protocol. The yields look good, the interface is clean, they're ready to deposit. But their assets are on Arbitrum and you're Base-exclusive. They close the tab.

This happens every day across DeFi. The friction of manual bridging, managing gas on unfamiliar chains, and navigating bridge interfaces kills conversion. Users will choose what’s already accessible on their chain, even if it's inferior.

The Portals API cross-chain update solves this. A single integration enables your users to bridge, swap, and deposit in a single transaction from any supported EVM chain. You tap into the liquidity and user base of 8+ networks without building any cross-chain infrastructure.

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Complete technical documentation with integration guides and code examples: build.portals.fi/docs/cross-chain

Portals cross-chain is powered by Squid Router and Axelar Network.

Same Endpoints, Cross-Chain Execution

Cross-chain swaps and zaps into yield positions now work through the same Portal endpoints you're already using. Provide the input token on one chain and an output token on another chain. We handle the bridging, the swapping, the routing. Your users sign one transaction on the source chain, and everything else happens automatically.

The entire operation is atomic: it either completes successfully or reverts cleanly. No assets stuck in bridges. No failed swaps leaving you with unwanted tokens on the destination chain. If any step fails, the transaction reverts and your users retain their original assets.

This atomic execution model enables sophisticated DeFi operations that were previously too complex for most users. Rebalancing a Morpho lending position from Ethereum to Arbitrum for better rates? One transaction. Re-collateralizing an Ethereum loan with yield generated on Base? The API handles withdrawal, bridging, and collateral deposit automatically. Depositing into an Euler vault on Optimism from assets on BNB Chain? What used to require numerous approvals, at least three separate transactions, and fifteen-plus minutes now completes in a single atomic operation.

Benefits For Users & Integrator

For Your Users:

• Access the best yields across all chains without being locked into one network

• Reposition seamlessly between protocols on different chains

• Eliminate bridging complexity, with the API bundling bridge, swap, and deposit into one transaction

• Save time/gas by avoiding multiple transactions and manual bridge workflows

• Reduce risk through atomic execution; operations complete entirely or revert cleanly

For Your Protocol:

• Expand your addressable market from one chain to all supported chains, including Ethereum, Arbitrum, Base, Optimism, Polygon, Avalanche, BNB Chain

• Gain competitive advantage while cross-chain is still a differentiator

• Establish yourself as the multi-chain option in your category 

• Attract users from 8+ networks who can access your protocol as easily as native user

Find Examples & Available Parameters Inside Documentation

Supported Networks

Currently supports Ethereum, Arbitrum, Base, Optimism, Polygon, Avalanche, BNB Chain, and more. As new chains are added, integrated protocols automatically gain access without additional work. 

Integration takes minutes. If you're already using Portals for single-chain operations, you're set up.

If you're new to Portals, the cross-chain endpoints work identically to standard swaps.

Find the complete technical documentation with integration guides and code examples: build.portals.fi/docs/cross-chain

About Portals.fi

Portals.fi is the DeFi Super App, a one‑click gateway to the on‑chain economy. With real‑time data and seamless execution, Portals.fi connects traders to over 20 million assets, thousands of protocols and every major blockchain.

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