Unified API Concepts

Class A

APIs that return enriched blockchain data applicable to all blockchain networks, eg: token balances, transactions, log events, etc

Class B

APIs maintained by Covalent for a specific protocol on a specific blockchain, eg: Constant Product AMMs (XY=K) on various blockchains.

Class C

APIs created and maintained by the community.

Development Key

A Development Key can make requests at 4 RPS.

Premium Key

A Premium Key can make requests at 50 RPS.

Real-time and Batched APIs

Real-time APIs return responses closer to the head of the blockchain, while batched APIs are usually delayed by 30 mins.