How to Build a Crypto Arbitrage Bot Across EVM Chains

Building a crypto arbitrage bot across EVM chains comes down to three things: quotes from every chain in parallel, a fast comparison loop that spots price gaps larger than fees, and a slippage-tolerant executor that actually lands the trade before the gap closes. Arbitrage windows on EVM chains typically last under 30 seconds on majors and 2-10 seconds on L2s , which means your bot's latency budget is tight — every extra HTTP round-trip is another trade lost. Using swapapi.dev as the swap backen