Ardor (ARDR) API Documentation

Ardor

Ardor (ARDR) is a proof-of-stake multichain platform with a parent chain securing transactional child chains, and its production network launched on January 1, 2018. Rather than EVM-style on-chain contracts, Ardor supports Java-based lightweight contracts and protocol-level transaction types, while nodes maintain account balances, parent-chain blocks, bundled child-chain transactions, and replicated ledger state. Its parent-child architecture makes chain, account, asset, currency, and transaction data first-class protocol objects, which shapes how applications query and submit operations.

Ardor API Methods and Endpoints

NOWNodes exposes Ardor's interface, plus a few others, depending on what your integration needs: its native HTTP API for querying chain state and broadcasting transactions. Archive mode extends this interface to historical states and data beyond standard retention.

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