Etherscan vs Nownodes

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.

NOWNodes runs hosted full nodes for Bitcoin, Ethereum, and dozens of other chains, giving developers a single JSON-RPC/REST gateway instead of operating node infrastructure themselves. A free tier covers 100,000 requests for one month to get started, after which usage moves to metered Pro/Business/Enterprise plans billed per request volume. Every endpoint requires an api-key header.