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Blast (BLAST) API Documentation

Blast

Blast (BLAST) is an EVM-compatible optimistic Ethereum Layer 2 built with the OP Stack, distinguished by protocol-level rebasing mechanics for ETH and USDB balances. Solidity contracts execute in a modified op-geth EVM environment with Ethereum-style accounts and storage, while nodes execute L2 transactions and maintain blocks, receipts, logs, contract state, and balance-share accounting. Because Blast preserves OP Stack and EVM execution conventions, standard Ethereum transaction formats, contract tooling, and JSON-RPC semantics remain the shared interface despite its modified balance accounting.

Blast API Methods and Endpoints

NOWNodes exposes Blast's interface, plus a few others, depending on what your integration needs: JSON-RPC for reading chain state and broadcasting transactions.

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 Blast 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.

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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: BLAST

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