# Starknet Sepolia RPC and network details

Source: https://www.alchemy.com/rpc/starknet-sepolia

Starknet Sepolia enables developers to test Cairo-based smart contracts on Starknet’s zk-rollup architecture. It simulates the network’s high-performance, zk-native environment for contract deployment and tooling integration.

## Network details

- Network: Sepolia
- Chain ID: 3.934021330259978e+23
- Environment: Testnet
- Category: L2
- Native token: STRK
- Gas token: ETH
- Settlement: Ethereum Sepolia
- Block time: 20-60s

## Endpoints

- Alchemy RPC: https://starknet-sepolia.g.alchemy.com/v2/API_KEY
- Alchemy WebSocket: wss://starknet-sepolia.g.alchemy.com/v2/API_KEY

Replace API_KEY with a key from https://dashboard.alchemy.com/signup.

## Alchemy product support

Supported on Starknet Sepolia: RPC API, Websockets, Webhooks.

Not currently supported: Transaction receipts API, Block Timestamp API, User OP Simulation API, Prices API, Debug API, Trace API, Bundler API, Token API, NFT API, gRPC, Gas Manager, Transfers API.

## Build on Alchemy

Alchemy offers Starknet Sepolia RPC endpoints and a range of devtools to help you test and debug your code before shipping to Starknet mainnet.

## Available networks

- Starknet Mainnet: https://www.alchemy.com/rpc/starknet

## Links

- Alchemy docs: https://docs.alchemy.com/reference/starknet-api-quickstart
- Official docs: https://docs.starknet.io/
- GitHub: https://github.com/starkware-libs
- Block explorer: https://sepolia.voyager.online/
- Bridge: https://starkgate.starknet.io/
- Faucet: https://www.alchemy.com/faucets/starknet-sepolia