# developers

- [Bear Network Chain SDK](/developers/bear-network-chain-sdk.md): https://github.com/BearNetwork-BRNKC/bearnetworksdk
- [TestNet](/developers/testnet.md)
- [JSON RPC](/developers/jsonrpc.md)
- [Token address](/developers/token-address.md): The official address and contract address of BearNetworkChain, only those listed in docs are the real official address and contract address of BearNetworkChain.