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Etherscan is the most used block explorer in crypto, and the Etherscan API gives you the same reliable data behind it across 60+ EVM chains. It is the reference layer teams trust to verify balances, transfers, internal transactions, and contract activity, with accuracy that holds up in front of users, finance, and compliance.
  • Onchain data API: balances, transactions, token transfers, contract source code, logs, gas, and stats through REST endpoints.
  • Etherscan Metadata: the identity layer of names, labels, and reputation for addresses, the same as on etherscan.io. Use it alone or alongside the onchain data API.

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Get Started

Set Up Your API Key

Create your Etherscan API key and make your first API call.

Build with AI

Connect agents to live data with MCP, the CLI, and skills.

Supported Chains

All 60+ EVM chains under one key. Set chainid to choose one.

Rate Limits

The calls per second and daily limits for each plan.

Endpoint Showcase

See which endpoints power each page on etherscan.io.

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Use Cases

Wallet and Portfolio

Token balances, transactions, and NFT holdings across every chain. Build with tokenbalance, txlist, tokennfttx.

Tax and Accounting

Records for filings and audits: internal transactions, transfers, historical balances, and name tags.

Security and Compliance

Screeners, monitoring, and risk dashboards. Build with getaddresstag, getsourcecode, fundedby.

Onchain Analytics and Research

Dashboards from transfers, holders, network stats. Build with dailytx, tokenholderlist, getlogs.