Crypto's Next Traders: AI Agents and the APIs That Power Them

AI agents are becoming major market participants in the crypto sector, with autonomous traders reaching a $15.4B market cap in early 2025 and driving a growing share of on-chain volume. As frameworks like ElizaOS make deploying autonomous agents easier, the critical bottleneck has shifted from agent development to API infrastructure—agents need fast, authentication-free APIs that return executable transaction data and support multiple blockchain networks. This guide ranks the top crypto APIs designed specifically for agent developers, evaluated on integration simplicity, chain coverage, and agent-friendliness.