# Blast RPC Node Yield-Bearing Ethereum L2 Connect to Blast, the Ethereum L2 with native ETH and USDB yield. Build DeFi, perps and yield strategies on a rollup where idle balances earn yield automatically — backed by our high-performance, non-custodial RPC infrastructure on Chain ID 81457. [Documentation](https://docs-rpc.crypto-chief.com/chains/blast) [Get a free endpoint ](https://auth.crypto-chief.com/registration) ##### 5 M+ Requests per Day ##### 99.9 % Network Uptime ##### < 100 ms Average Response Time ##### 24/7 Technical Support ## Specification Blast Network Technical characteristics and available endpoints ![Blast (ETH)](/img/protocols/blast.svg) ### Blast (ETH) Mainnet & Sepolia Testnet Support Chain ID 81457 Protocol HTTPS / WSS Uptime 99.9% Block Time \~2s Consensus Optimistic Rollup EVM Compatible Yes Blast is an Ethereum L2 distinguished by native, protocol-level yield on ETH and the USDB stablecoin. Idle balances automatically rebase, so DeFi apps inherit yield without per-protocol staking logic. It uses an optimistic rollup design with full EVM equivalence and ETH for gas. #### Key capabilities: - Native yield-bearing ETH and USDB - Full EVM equivalence — same tooling as Ethereum mainnet - Optimistic rollup with Ethereum-grade security - \~2s block times, low fees - Built-in gas refund mechanics for L2 fees - Strong DeFi ecosystem (perps, lending, AMMs) #### 🔗 RPC Endpoints HTTPS `https://rpc.crypto-chief.com/blast/{YOUR_API_KEY}` WSS `wss://rpc.crypto-chief.com/blast/ws/{YOUR_API_KEY}` Replace {YOUR\_API\_KEY} with your actual API key from the dashboard. ## What is a Blast RPC Node? Yield-native Ethereum L2 access A Blast RPC node provides programmatic access to the Blast Layer 2 network — the same JSON-RPC interface every EVM developer knows, with a unique twist: native asset balances rebase automatically as the protocol distributes ETH staking yield and T-Bill yield on USDB. ### How is Blast different from other L2s? Most L2s require apps to integrate liquid staking tokens (stETH, rETH) to capture yield. Blast bakes yield into the base layer — every ETH and USDB balance on Blast accrues yield without additional contracts. For users this means idle deposits earn; for builders it means simpler yield-aware UX. **Where Blast fits best:** - **Perps & derivatives** — collateral earns yield while positions are open - **DEXs & AMMs** — passive yield improves capital efficiency - **Lending markets** — supply-side returns baked in - **Treasury & DAO tooling** — idle balances aren't idle anymore ## Technical Documentation Quick start for developers ### Supported RPC Methods Blast is fully EVM-equivalent — every standard eth\_\* and web3\_\* method that works on Ethereum works on Blast. Our gateway supports the entire JSON-RPC specification including archive methods, trace methods, and the eth\_subscribe family over WebSocket. - **eth\_blockNumber** — latest block number - **eth\_getBalance** — ETH balance (rebasing) of an address - **eth\_call** — read-only smart-contract calls - **eth\_sendRawTransaction** — broadcast signed transactions - **eth\_getLogs** — contract logs and events - **eth\_subscribe** — real-time blocks, logs, pending transactions ### Code Examples 💻 #### JavaScript (ethers.js) — Blast Connection: ``` import { ethers } from 'ethers'; const provider = new ethers.JsonRpcProvider('https://rpc.crypto-chief.com/blast/YOUR_API_KEY'); const block = await provider.getBlockNumber(); console.log('Blast block:', block); ``` 💻 #### Python (web3.py) — Blast Setup: ``` from web3 import Web3 w3 = Web3(Web3.HTTPProvider('https://rpc.crypto-chief.com/blast/YOUR_API_KEY')) print('Chain ID:', w3.eth.chain_id) # 81457 print('Block:', w3.eth.block_number) ``` 💻 #### WebSocket — Monitor Blast Activity: ``` const provider = new ethers.WebSocketProvider('wss://rpc.crypto-chief.com/blast/ws/YOUR_API_KEY'); provider.on('block', n => console.log('New Blast block:', n)); ``` ## Why choose us? High-performance Blast RPC infrastructure with enterprise-grade reliability for production Web3 applications. ### Enterprise reliability Globally distributed nodes with automatic failover and 99.9%+ uptime — built for production traffic at any scale. ### Low latency Regional routing ensures sub-100ms response times across North America, Europe and Asia for your dApp users. ### Horizontal scaling Distributed architecture and intelligent caching handle traffic spikes without manual intervention or downtime. ### Real-time monitoring Track request volume, latency, error rates and per-endpoint health from your dashboard in real time. ### Secure access HTTPS/WSS encryption everywhere, scoped API keys, IP/domain whitelists and audit-logged operations. ### Developer-friendly Standard JSON-RPC, REST and WebSocket protocols compatible with every major SDK and wallet library. ## Examples of Use Build yield-aware DeFi without per-protocol staking logic. Blast's native yield design opens up integrations that would be expensive or impractical on chains without rebasing assets. #### Perps with yield-earning collateral Run perps and futures markets where traders earn yield on margin between trades, improving total return without active management. #### AMMs with rebasing pools Build AMMs and DEXs where idle liquidity earns yield, reducing impermanent loss risk and boosting LP APRs. #### Lending & borrowing Money markets benefit from native supply-side yield — borrowers pay less in net interest, lenders capture extra yield. #### Stablecoin payment flows USDB rebases at T-Bill rates — perfect for payment apps, payroll and treasury that want passive yield on idle stables. #### DAO & treasury management DAOs hold significant idle balances. Blast turns that idle capital into productive yield without active management. #### Launch new yield primitives Build novel yield strategies on top of an already-yielding base layer for compounded returns. ## Got questions? we are here to help ## What is Blast? Blast is an Ethereum Layer 2 rollup with native yield on ETH and the USDB stablecoin. Balances rebase automatically — apps inherit yield without per-protocol staking logic. ## What is the Chain ID for Blast? Blast Mainnet uses Chain ID 81457\. The Sepolia testnet uses Chain ID 168587773. ## Is Blast EVM-compatible? Yes — Blast is fully EVM-equivalent, so every Solidity contract, Hardhat/Foundry workflow and Ethereum wallet (MetaMask, Rabby, etc.) works out of the box. ## Where does the yield come from? ETH yield comes from Ethereum staking (Lido). USDB yield comes from on-chain T-Bill protocols (MakerDAO). The Blast bridge auto-deposits L1 ETH and stablecoins into these yield sources. ## Is the Blast testnet supported? Yes — Blast Sepolia testnet endpoints are available for development and integration testing. Contact support or check your dashboard for testnet RPC URLs. ## Can I use archive methods on Blast? Yes — our infrastructure includes archive nodes, so trace\_call, debug\_traceTransaction and historical state queries are fully supported. ## Pricing that grows with your needs. ### Free Start building on Web3 — no credit card. ##### $0 - 5 reqs/sec RPC - 5 reqs/min Unified API - 1 req/day AML - Ultimate chains - WSS, Statistics - Community support [Get started ](https://auth.crypto-chief.com/registration) ### Pay for use Flexible pay-as-you-go for any workload. ##### From $10 - 400 reqs/sec RPC - 300 reqs/min Unified API - 5 reqs/sec AML - EventStream - Ultimate chains - WSS, Whitelists, Statistics - Support portal [Get started](https://auth.crypto-chief.com/registration) ### Subscription From $500 monthly plus 20% extra value. ##### From $500 - 400 reqs/sec RPC - 300 reqs/min Unified API - 5 reqs/sec AML - EventStream - Ultimate chains - WSS, Whitelists, Statistics - Support portal [Get started ](https://auth.crypto-chief.com/registration) ### Enterprise Tailored solution for expert builders ##### Custom terms All Subscription features plus: - Flexible rate limits - Engineering team support - Custom SLA - Personal manager [Contact Sales ](/contact/)