Etherscan vs TWZRD Agent Intel

Etherscan's API exposes the same account balances, transactions, contract source, and gas-tracker data shown on the block explorer, addressed to Ethereum mainnet and its testnets through a single query-parameter-based endpoint. Calls against the older V1 endpoint now return a deprecation notice pointing at the documented V2 migration, so new integrations should build against V2 directly. Free-tier keys cover light use, with paid plans unlocking higher rate limits.

TWZRD is a Solana-native trust layer that AI agents call before and after making an x402 micropayment, returning a signed reputation receipt for a given wallet instead of gating access behind a signup-based API key. A free sample receipt and verifier endpoint let integrators test the signing scheme before spending real USDC on a live trust lookup, priced at $0.05 per call. Its JSON responses carry no CORS headers, so it's built to be called server-side or by an agent, not from a browser.