Solana Beta is now live
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Test on Sepolia the way you will run mainnet: a dedicated testnet endpoint for CI pipelines, deployment rehearsals and integration suites.
latency
Quick connect
Drop this URL into your RPC client, HTTP library or wallet config. No SDK install required.
https://eu.endpoints.matrixed.link/rpc/ethereum-sepolia?auth=YOUR_API_KEY wss://eu.endpoints.matrixed.link/ws/ethereum-sepolia?auth=YOUR_API_KEY
Replace YOUR_API_KEY with your API key.
Get a free key →
Connect
Copy-paste examples for the libraries you already use. Swap the API key, hit run.
import { ethers } from "ethers";
const provider = new ethers.JsonRpcProvider(
"https://eu.endpoints.matrixed.link/rpc/ethereum-sepolia?auth=YOUR_API_KEY"
);
// Confirm you are on Sepolia (chain ID 11155111)
const network = await provider.getNetwork();
console.log(network.chainId); // 11155111nAbout Ethereum
Connect to the Ethereum Sepolia Testnet with BoltRPC’s reliable RPC infrastructure. Start your free 2-week trial and access Sepolia alongside Ethereum mainnet from the same provider, with testnet RPC parity to your production setup.
| Chain ID | 11155111 |
| Protocol | PoS testnet |
| Block time | ~12 s |
| Native token | ETH (test) |
| Finality | ~2 epochs (~12.8 min) |
| EVM compatible | Yes |
Sepolia is Ethereum’s recommended general-purpose testnet for smart contract development and dApp testing. It replaced Ropsten as the primary testnet for application developers and has been stable and well-maintained since Ethereum’s transition to proof-of-stake. Sepolia is the right choice for teams building dApps, ERC-20 tokens, NFT contracts, DeFi protocols, or any application-layer smart contract that needs to be validated before deployment to Ethereum mainnet.
The Sepolia testnet closely mirrors Ethereum mainnet in terms of EVM behaviour, transaction lifecycle and JSON-RPC API surface. Smart contracts that pass testing on Sepolia behave as expected on mainnet. That makes it the standard staging environment for application developers across the Ethereum ecosystem.
Sepolia is explicitly not designed for validator testing or staking infrastructure. Teams that need to test deposit contracts, withdrawal flows, or validator client software should use Hoodi Testnet instead. The distinction matters: Sepolia’s validator set is permissioned and small, so it does not replicate the full Ethereum consensus layer for staking purposes. For dApp development, however, that permissioned validator set is an advantage: it keeps the chain stable and predictable, which is exactly what application teams need during development and integration testing.
Use Sepolia when your workflow includes any of the following: deploying and testing smart contracts before mainnet, running automated integration test suites against a live EVM chain, testing protocol interactions, running dApp staging environments, verifying contract behaviour with real transaction flows, or developing tooling that interacts with Ethereum’s JSON-RPC API. Sepolia test ETH has no real-world value and is freely available from faucets, which means your development team can run transactions at volume without any cost.
For teams building on multiple Ethereum-compatible networks, using BoltRPC for Sepolia alongside your Ethereum mainnet connection means one API key, one endpoint format and one provider to manage across your entire stack.
Why BoltRPC
BoltRPC's 2-week free trial includes testnet access. Your Sepolia workflow uses the same endpoint format, the same API key and the same infrastructure quality as your Ethereum mainnet setup. No separate accounts or configurations for testnet.
Sepolia is the standard testnet for Ethereum smart contract development and dApp testing. BoltRPC gives your Sepolia endpoint the same reliability as your production connections. Automated test suites, staging environments and CI/CD pipelines that rely on Sepolia get consistent, stable RPC access.
Public testnet RPCs drop connections, hit rate limits and lag behind the chain tip. BoltRPC gives your Sepolia workflows the same stability as your mainnet setup. No broken test pipelines from unreliable endpoints.
Use BoltRPC on Sepolia and Ethereum mainnet from the same provider. One API key, one endpoint format, one configuration to manage. When you promote from Sepolia to mainnet, only the endpoint slug changes.
Subscribe to Sepolia testnet events via WebSocket at wss://eu.endpoints.matrixed.link/ws/ethereum-sepolia?auth=YOUR_API_KEY. Useful for integration test suites that need real-time block confirmation events, contract event subscriptions, or pending transaction monitoring during development.
BoltRPC's endpoint infrastructure is operated by Matrixed.Link, certified to ISO/IEC 27001:2022. For teams in regulated industries or organizations with vendor security requirements, this matters even for testnet access as the same infrastructure serves both testnet and mainnet workloads.
Methods
Every standard Ethereum method you'd expect. Archive-only methods are available on request for qualifying plans.
standard
9 eth_call eth_sendRawTransaction eth_getBalance eth_blockNumber eth_getTransactionReceipt eth_getLogs eth_estimateGas eth_getCode javascript
import { ethers } from "ethers";
const provider = new ethers.JsonRpcProvider(
"https://eu.endpoints.matrixed.link/rpc/ethereum-sepolia?auth=YOUR_API_KEY"
);
const wallet = new ethers.Wallet(process.env.PRIVATE_KEY, provider);
// Deploy contract
const factory = new ethers.ContractFactory(abi, bytecode, wallet);
const contract = await factory.deploy();
await contract.waitForDeployment();
const address = await contract.getAddress();
console.log("Deployed to Sepolia:", address);
// Verify deployment
const code = await provider.getCode(address);
console.log("Contract deployed:", code.length > 2);
FAQ
Common questions about connecting to Ethereum over BoltRPC.
Get started
One endpoint format, 20+ networks, no SDK. Drop our URL into the client you already use and your integration is done.
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