Alephium (ALPH) API Documentation

Alephium

Alephium (ALPH) is a sharded Layer 1 smart contract network secured by Proof-of-Less-Work, with mainnet live since November 8, 2021. Contracts are written in Ralph and executed by the Alphred VM, while its stateful UTXO model lets full nodes track spendable outputs, contract state, blocks, and transaction history across BlockFlow shards. That combination of sharded proof-of-work and stateful UTXOs gives developers a non-EVM execution model whose node interface exposes both UTXO data and programmable contract state.

Alephium API Methods and Endpoints

NOWNodes exposes Alephium's interface, plus a few others, depending on what your integration needs: its native HTTP API for reading 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 Alephium RPC providers against each other? Read the comparison guide on our blog — this page stays focused on integration reference.