Koios

Koios is a distributed & open-source public API query layer for Cardano, that is elastic in nature and addresses ever-demanding requirements from Cardano Blockchain.

INFO

XRAY/Network manages a standalone Koios cluster. Unauthenticated uses a basic tariff with limits on requests from Origin and IP addresses, so be aware that if the load on your application grows, you should switch to paid tariffs and recharge XRAY/Graph.

Tips

• Playground & API docs: https://api.koios.rest/
• You can configure API url and headers when initializing CW3js.

Usage examples

import { CardanoWeb3 } from "cardano-web3-js"

const web3 = await CardanoWeb3.init()

const accountList = await web3.explorer.koios.GET("/account_list")
console.log(accountList)

const accountListWithOffsetAndLimit = await web3.explorer.koios.GET("/account_list&offset=1000&limit=500")
console.log(accountListWithOffsetAndLimit)

const accountInfo = await web3.explorer.koios.POST("/account_info", {
  body: {
    _stake_addresses: ["stake..."]
  }
})
console.log(accountInfo)

// etc...

Direct API Access

https://graph.xray.app/output/koios/mainnet/api/v1/tip