What is Covalent:

We at Covalent believe that access to organized blockchain data can unlock a billion possibilities and so we provide the best blockchain API to bring full transparency and visibility to assets across all blockchain networks. With the Covalent Unified API, there is no need to invest developer resources in writing SQL or other queries since granular, decoded, multi-chain data is immediately available for 200+ blockchain networks including Ethereum, Polygon, BSC, Optimism, Arbitrum and Avalanche. Covalent is fast becoming the go-to data provider, with the Covalent Unified API powering over 5,000 industry-leading projects such as 0x, ChainGuardians, Rainbow Wallet, Jump Crypto, Rotki and Koinly.

What data does Covalent provide:

Aggregated on-chain data from over 200+ blockchains. Check out our API Reference for the full list. You can also see the endpoints broken down by category on the left of this page.

How to use this Collection:

1. Get your API Key here. It's free.
2. Click on Covalent API collection on the left. This will open up the collection panel.
3. Under the Authorization tab, select Basic Auth for Type field, and paste your API key into the Username field.
4. You're all set! Make your first request by heading to the BalancesService/ subfolder, and clicking on getErc20TransfersForWalletAddressendpoint. Enter in your query parameters and hit Send.

Additional Developer Resources:

Check out:

* API Docs - Use the Covalent API directly from the browser with our API docs
* GoldRush Kit - Beautifully designed React components for your dApp front end
* Typescript SDK - Fast integration of the Covalent API into existing applications
* Guides - Resources to help solve specific problems or use cases using the Covalent API