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Access the Ethereum Sepolia Beacon Chain consensus layer with BoltRPC's reliable Beacon API endpoint. Free 2-week trial, no credit card required.
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-beacon?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.
const response = await fetch(
"https://eu.endpoints.matrixed.link/rpc/ethereum-sepolia-beacon/eth/v1/beacon/headers/head",
{
headers: {
"Authorization": "Bearer YOUR_API_KEY"
}
}
);
const data = await response.json();
console.log(data.data.header.message.slot);Why BoltRPC
Sepolia's smaller validator set means validator activation queues are shorter than on Hoodi or mainnet. When testing EIP-4895 withdrawal flows , especially scenarios that require spinning up fresh validators to test credential changes from the beginning , shorter queue wait times mean more test cycles per day. Teams iterating on BLS-to-execution-layer credential migration logic, partial withdrawal triggers, or full exit sequences benefit from Sepolia's faster activation cycles during active development.
Bridge protocols and cross-chain messaging systems that test on Sepolia's execution layer need finality checkpoints from the Sepolia Beacon API to verify their finality-dependent logic. BoltRPC provides both the Sepolia execution layer endpoint and the Sepolia Beacon endpoint from one provider with one API key. Teams building bridge contracts on Sepolia can query execution layer events and consensus finality simultaneously, from the same configuration, without coordinating between separate providers.
Most Sepolia teams reach a point where the execution layer alone is not enough: withdrawal flows, finality verification for bridges, or staking dashboard data all require the Beacon API. BoltRPC covers both. Adding the Sepolia Beacon endpoint to an existing Sepolia execution setup is a URL change, not a new account, new authentication system, or new invoice.
BoltRPC supports both the Sepolia Beacon Chain and the Ethereum mainnet Beacon Chain under the same authentication pattern and endpoint format. When your application moves from Sepolia testing to mainnet, the migration is one URL change. The credential check logic, finality polling code and validator status queries you tested on Sepolia work identically on mainnet.
BoltRPC runs on Matrixed.Link's ISO/IEC 27001:2022 certified infrastructure. For teams building staking products, bridge protocols, or cross-chain applications with compliance requirements, certified infrastructure is relevant at the development and testing stage , not just in production.
FAQ
Common questions about connecting to Ethereum over BoltRPC.
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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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