Ethereum APIs
Ethereum APIs range from raw node access to indexed token and whale data. Infura provides hosted mainnet and testnet nodes over JSON-RPC via HTTPS or WebSocket. Etherscan indexes balances, transactions and contracts across Ethereum and 60+ EVM chains, and Ethplorer focuses on token balances and prices. Deep Blue Alpha tracks whale wallets' DEX swaps and exchange flows. Each needs an API key.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
Deep Blue AlphaReal-time Ethereum whale-wallet tracking: DEX swaps, exchange flows, and sentiment scoring. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | Unlimited | Degraded |
EtherscanEthereum and 60+ EVM chain blockchain data: balances, transactions, contracts, token transfers. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | 10k+/day | Live |
EthplorerEthereum token balances, prices, transactions, and contract data across several EVM chains. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | 1k–10k/day | Live |
INFURA EthereumHosted Ethereum node access (mainnet and testnets) via JSON-RPC, over HTTPS or WebSocket. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | — | Untested |
Deep Blue AlphaFreemiumDegraded
Real-time Ethereum whale-wallet tracking: DEX swaps, exchange flows, and sentiment scoring.
API key · JSON
Unlimited
llms.txt
EtherscanFreemiumLive
Ethereum and 60+ EVM chain blockchain data: balances, transactions, contracts, token transfers.
API key · JSON
10k+/day
MCP server · llms.txt
EthplorerFreemiumLive
Ethereum token balances, prices, transactions, and contract data across several EVM chains.
API key · JSON
1k–10k/day
no machine-readable spec
INFURA EthereumFreemiumUntested
Hosted Ethereum node access (mainnet and testnets) via JSON-RPC, over HTTPS or WebSocket.
API key · JSON
—
no machine-readable spec
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Choosing an Ethereum API
Is there a free Ethereum API?
Yes. Etherscan, INFURA Ethereum, Ethplorer and Deep Blue Alpha have a free tier alongside paid plans.
Which Ethereum APIs work without an API key?
All of them need a key or account. Etherscan, INFURA Ethereum, Ethplorer and Deep Blue Alpha give one out free when you sign up.
Can I use Ethereum APIs in a commercial project?
INFURA Ethereum and Deep Blue Alpha permit commercial use. Etherscan restricts it, for example to non-commercial or attributed use, so read the terms first.
Which Ethereum APIs work with AI agents?
Etherscan has an MCP server, so an AI agent can call it directly.
Broader: Blockchain Data & Nodes APIs · Crypto APIs
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