> ## Documentation Index
> Fetch the complete documentation index at: https://docs.useotto.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Supported Chains & Li.Fi Integrations

> The chains Otto operates across, by surface, with Li.Fi aggregation for bridges and DEX routing.

Otto operates across a growing set of EVM chains plus Solana and X Layer. Cross-chain bridges and DEX aggregation are routed through [Li.Fi](https://li.fi); the authoritative live list of supported bridges and aggregators is Li.Fi's own, so refer to the [Li.Fi Tools API](https://li.quest/v1/tools) for current per-chain coverage — integrations evolve.

## Chains by surface

Different Otto surfaces reach different chains. Check the surface you're using:

| Surface                                          | Chains                                                                 |
| ------------------------------------------------ | ---------------------------------------------------------------------- |
| **/app Swap & Bridge mini-agent**                | The broadest set — the EVM chains + Solana listed below.               |
| **Trade Execution agent** (ACP + x402 execution) | Base, Ethereum, Arbitrum, Polygon, BSC, Avalanche (6 EVM) + Solana     |
| **Otto X**                                       | X Layer (Chain ID 196), via the [Otto X storefront](/acp-swarm/otto-x) |

<Note>
  The Trade Execution agent's 6-EVM-plus-Solana scope is its execution/portfolio reach and is intentionally smaller than the swap widget's coverage. If a chain isn't listed for the surface you're using, it isn't reachable there.
</Note>

## Supported chains (Li.Fi integration coverage)

Otto uses Li.Fi to aggregate bridges and DEXs across these networks:

* Arbitrum (ARB)
* Optimism (OP)
* Base (BASE)
* Ethereum (ETH)
* Unichain (UNI)
* Polygon (POL)
* Sonic (S)
* Binance Smart Chain (BSC)
* Avalanche (AVAX)
* Berachain (BERA)
* ApeChain (APE)
* Solana (SOL) — cross-chain bridges from EVM, with gas fronting via LI.Fuel
* X Layer (XL) — via [Otto X](https://xlayer.ottoai.services)

For the full, current list of bridges (Stargate, Across, Squid, Relay, and more) and DEX aggregators (0x, 1inch, LI.FI, OKX, and more) available on each chain, query the [Li.Fi Tools API](https://li.quest/v1/tools) — Otto routes through whichever Li.Fi supports for your pair.