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Kaia (KAIA) API Documentation

Kaia

Kaia (KAIA) is an EVM-compatible Layer 1 using an optimized Istanbul BFT consensus design with deterministic finality and one-second block intervals. Solidity contracts compile to EVM bytecode and execute against account-based state, while full nodes process blocks and maintain balances, contract code, storage, receipts, logs, and validator-related state. Because Kaia preserves Ethereum execution semantics and transaction formats, standard EVM tooling and JSON-RPC conventions remain the shared application-facing baseline.

Kaia API Methods and Endpoints

NOWNodes exposes Kaia's interface, plus a few others, depending on what your integration needs: JSON-RPC for reading chain state and broadcasting transactions, and Trace/Debug for step-level execution analysis.

Browse the interfaces below for endpoint details, request parameters, response formats, and integration examples. Create an API key, select Mainnet or Testnet, choose the required interface, and start sending requests from your application.

Weighing Kaia RPC providers against each other? Read the comparison guide on our blog — this page stays focused on integration reference.

Quick start

01

Get an API key

Sign up and generate a free key from the dashboard.

Get key →
02

Select environment

Mainnet or Sepolia testnet.

03

Choose an interface

RPC, WSS, Blockbook, or Trace/Debug.

04

Send a request

Call it from your application.

RPCJSON-RPCStandard RPC methods for reading chain state and broadcasting transactions.Node APIs →WSSWebSocketPersistent connections for new blocks, pending transactions, and log events as they happen.WSS API →T/DTrace & DebugStep-level execution traces for inspecting calls and diagnosing transactions.Trace & Debug API →ARCArchive modeFull historical state access beyond standard node retention.Archive nodes →MCPModel Context ProtocolThe Model Context Protocol (MCP) is an open standard that lets AI assistants call external tools through a uniform interface.MCP →

Ready to build on: KAIA

Create a free API key and start sending requests in minutes.