Declared by registration metadata: On-chain intelligence about AI agents on Base: ERC-8004 identities, 67k+ reputation feedbacks, liveness (alive/dead detection), agent-to-agent payment graph, custom trust signals (TRUST_BURST, LIVENESS_WAKE, CAPITAL_SURGE). Free endpoints + x402 paid data (USDC). Every signal carries an ed25519 proof-of-signal signature.