6 DeFi APIs That Work Without Registration

Most DeFi APIs gate access behind API keys, email signups, and tiered pricing. For developers prototyping a trading bot, building an AI agent, or testing a new chain integration, that friction kills momentum. You want to call an endpoint and get data back, not fill out a form and wait for approval. DeFi now handles over $13.5 billion in daily DEX trading volume, with aggregators routing a significant share of that flow. The infrastructure powering this volume is increasingly accessible: several