Bridge Cost Optimizer

Compare live cross-chain bridge quotes from multiple providers to find the cheapest, fastest, or balanced token transfer route between EVM and select non-EVM...

Find the cheapest and fastest cross-chain bridge for any token+amount+source+destination.

What this skill can do (working code, no promises)

• Compare live quotes from Across, Stargate, Hop, Connext, Wormhole, and deBridge public read endpoints.
• Score each route on: total USD cost, estimated delivery time, number of hops, and a composite "best" score.
• Recommend the optimal route given a user preference (cheapest, fastest, or balanced).
• Filter by token (USDC, USDT, ETH, WETH, DAI) and source/destination chain.

What this skill cannot do (honest limits)

• It does not execute the bridge. It produces a recommendation and the calldata URL — you must sign and send via your own wallet.
• Quote APIs are pulled at request time; rates move. Always re-pull within 30 seconds of signing.
• Public endpoints can rate-limit. The skill has a built-in retry+timeout but no paid-tier fallback.
• Non-EVM chains are partially supported (Stargate handles Solana + some non-EVM; Wormhole covers more). The CLI defaults to EVM-only unless --allow-non-evm is passed.

Install

bash

pip install requests

Usage

bash

# Cheapest way to bridge 1000 USDC from Ethereum to Base
python scripts/bridge_optimizer.py compare --from ethereum --to base --token USDC --amount 1000

# Fastest route, prefer low time over cost
python scripts/bridge_optimizer.py compare --from arbitrum --to optimism --token ETH --amount 0.5 --prefer fastest

# All quotes, table view
python scripts/bridge_optimizer.py table --from polygon --to base --token USDC --amount 500

Environment

• BRIDGE_PREFERENCE — default balanced (alternates between cheapest and fastest per call).
• BRIDGE_TIMEOUT_SEC — request timeout (default 10).

Limitations to be aware of

• Bridge fee APIs do not always return USD-denominated fees; the script converts via CoinGecko's free public price endpoint.
• Some bridges (Wormhole portal) are not strictly "cheapest" — they exist for token coverage. Use them when the token isn't available on Stargate or Across.