Elastic Cardano Query Layer!
A consistent query layer for developers to build upon, with multiple, redundant endpoints that allow for easy scalability.
Our Mission
What is Koios REST API?

Resource and maintenance requirements for Cardano components (e.g. cardano-node, cardano-db-sync) are ever-growing. Along with that, every builder needs to identify how to query complex information from the chain.

Minimum requirements

We want to provide the developer with a data layer that they can rely on without having to constantly reinvent the wheel.

Data standards

Some queries are very complex and therefore prone to errors. We want to make them available in a standardised way – also via future hardforks.

Failover support

You can rely on Koios! That’s why all access points, front-end and back-end nodes are designed with multiple redundancy. There is no central instance..


If you have a good idea and want to implement it with Cardano, you should concentrate fully on it and get started straight away. Koios helps you to do this.