Otto AI — x402 Open Router
https://x402.ottoai.services/.well-known/agent.json
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Pay-per-call AI services for autonomous agents, plus a discover-and-pay meta-router. Market & token intelligence, DeFi & markets data, web/domain intelligence, real-world data, AI creative tools, portfolio reads, and on-chain execution. USDC on Base, Polygon, or Solana via x402 V2. From $0.001 per call; the live endpoint list and count are in /openapi.json and /.well-known/x402.
Transport
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Protocol
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Price
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How to call
A2A endpoint (JSONRPC)
https://x402.ottoai.services