Covalent vs Etherscan

Covalent's blockchain-data platform rebranded to GoldRush, unifying wallet balances, transaction history, NFT ownership, and token/DEX pricing across 100+ EVM and non-EVM chains behind one API, plus JSON-RPC endpoints for 30+ EVM networks. New accounts get a 14-day trial (25,000 credits) before moving to a paid plan or per-request (x402) billing with no monthly minimum. All data comes back as JSON.

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.