The complete onchain data API for the crypto ecosystem
Etherscan API gives you the same reliable data behind Etherscan.io, the most used block explorer in crypto.
Why Teams Choose Etherscan API First
Explorer-grade blockchain data for teams that need accuracy, coverage, and scale from day one.
The first-choice API for EVM data
When teams need blockchain data they can defend in front of users, finance, or compliance, they start with Etherscan.
The reference layer for onchain data
Built by the #1 block explorer, Etherscan API is used as a reference point to verify balances, transfers, internal transactions, and contract activity.
Accuracy that holds up under scrutiny
Capture edge cases many providers miss and reduce time spent reconciling mismatched records across tools.
One integration, 60+ chains
Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, and more. Same endpoints, same structure, one API key.
From hobby build to institutional scale
Start free. Scale to higher limits, Pro endpoints, and dedicated infrastructure when the product and traffic demand it.
The default for mission-critical data
If blockchain data is mission-critical, Etherscan API is the default choice for teams that need accuracy and reliability.
What you can build with Etherscan API
From a builder's first app to a powerful production pipeline, the same data and the same API key.
Wallet and Portfolio
Show users their full onchain history: token balances, transactions, NFT holdings, and historical activity across every chain they hold assets on.
Tax & Accounting
Power tax filings, accounting workflows, and audit reports with complete records: internal transactions, token transfers, historical token balances, and address name tags.
Security and Compliance
Build wallet screeners, transaction monitoring, and risk dashboards with labeled addresses, contract source code, funding traces, and full historical interactions across every supported chain.
Onchain Analytics & Research
Build dashboards, research reports, and protocol monitors with token transfers, holder distributions, daily network stats, and event logs.
Single API to access our Endpoints & Metadata
Everything you need for powerful utility when you're building.
All API Endpoints
View all our available endpoints on Etherscan API documentation.Multichain by Default
Turn your app to multichain with our API that supports over 60+ supported chains.
Get Started Today
Join thousands of builders and enterprises already building with Etherscan API.
