# Celo Sepolia RPC and network details

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

This is the new primary testnet for Celo and replaces the Alfajores network when Holesky sunsets in Septembet 2025.

## Network details

- Network: Sepolia
- Chain ID: 11142220
- Environment: Testnet
- Category: L1
- Native token: CELO
- Gas token: CELO
- Block time: 1s

## Endpoints

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

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

## Alchemy product support

Supported on Celo Sepolia: RPC API, Debug API, Bundler API, Token API, Websockets, Gas Manager, Webhooks, Transfers API.

Not currently supported: Transaction receipts API, Block Timestamp API, User OP Simulation API, Prices API, Trace API, NFT API, gRPC.

## Build on Alchemy

Alchemy provides Celo Sepolia RPC endpoints. Simplify your testing with Alchemy data and tooling.

## Available networks

- Celo Mainnet: https://www.alchemy.com/rpc/celo

## Links

- Alchemy docs: https://www.alchemy.com/docs/reference/celo-api-quickstart
- Official docs: https://docs.celo.org/
- Website: https://celo.org/
- GitHub: https://github.com/celo-org
- Block explorer: https://celo-sepolia.blockscout.com/
- Bridge: https://docs.celo.org/protocol/bridge