API3 launches AirnodeHub, an API marketplace for AI agents with verifiable signatures
- —AirnodeHub supports natural-language API discovery and MCP-based catalog calls
- —API responses are signed with the Airnode address, request hash, timestamp and data
- —Signatures prove source and integrity, not data accuracy or freshness
- —Per-request payment via x402 in USDC; registered APIs free during initial period
Why it matters: A verifiable API signature standard could become the trust layer for autonomous AI agents in the onchain economy.
Source: TokenPost