Skip to main content
Every request to the Etherscan API needs an API key.
1

Register an Etherscan account

Sign up for a free account at etherscan.io/register.
2

Create your API key

Open your API dashboard, select Add to create a new API key, then copy the key and store it somewhere safe. This key can be used to access all 60+ supported chains.
Etherscan API keys
3

Make your first call

Now that you have an API key, learn how to make requests across all 60+ supported chains:

Make Your First Call

Run your first request, read the response, and switch chains.

​
Free API plan and limits

A free API plan allows 3 calls per second and up to 100,000 calls per day on most chains, cumulative across all the keys you have created. Paid plans raise the rate limits, unlock access to all chains, and the Standard plan and above add PRO endpoints. See Rate limits for the full breakdown.