# Sei RPC and network details

Source: https://www.alchemy.com/rpc/sei

Sei is a Cosmos-SDK L1, optimized for order-book DeFi, leveraging parallel transaction processing to achieve 300ms block times. With native price matching, Sei is ideal for bringing the experiences of traditional financial institutions and CEXs onchain.

## Network details

- Network: Mainnet
- Chain ID: 1329
- Environment: Mainnet
- Category: L1
- Native token: SEI
- Gas token: SEI
- Block time: <1s

## Endpoints

- Alchemy RPC: https://sei-mainnet.g.alchemy.com/v2/API_KEY
- Alchemy WebSocket: wss://sei-mainnet.g.alchemy.com/v2/API_KEY

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

## Alchemy product support

Supported on Sei: RPC API, Debug API, Websockets.

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

## Build on Alchemy

Alchemy provides reliable Sei RPC endpoints that enable you to build onchain. In addition, Alchemy offers a Debug API for getting insights into onchain transactions, websockets for block data streaming, and more.

## Available networks

- Sei Testnet (testnet): https://www.alchemy.com/rpc/sei-testnet

## Links

- Alchemy docs: https://docs.alchemy.com/reference/sei-api-quickstart
- Official docs: https://docs.sei.io/
- Website: https://www.sei.io/
- GitHub: https://github.com/sei-protocol
- Block explorer: https://www.seiscan.app/pacific-1
- Bridge: https://www.sei.network/bridge