The 0G mainnet is the production network. Pass network="mainnet" to create_broker() (it’s also the SDK’s default if you don’t specify a network).
Mainnet operations consume real 0G tokens. Test thoroughly on Galileo testnet before deploying to mainnet.

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Network parameters

ParameterValue
Network name0G Mainnet
Chain ID16661
Token symbol0G
Block explorerchainscan.0g.ai
Ecosystem explorerexplorer.0g.ai
RPC endpointhttps://evmrpc.0g.ai
Use a third-party RPC provider for production workloads (QuickNode, ThirdWeb, Ankr). The public endpoint is rate-limited.

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Compute contract addresses

The SDK resolves these automatically from the chain ID — only needed if you call contracts directly.
ContractAddress
Ledger0x2dE54c845Cd948B72D2e32e39586fe89607074E3
Inference Serving0x47340d900bdFec2BD393c626E12ea0656F938d84
Fine-tuning Serving0x4e3474095518883744ddf135b7E0A23301c7F9c0

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Connect from Python

from zerog_py_sdk import create_broker

broker = create_broker(
    private_key = "0xYOUR_PRIVATE_KEY",
    network     = "mainnet",            # or omit — mainnet is the default
)
print(f"Chain ID: {broker.web3.eth.chain_id}")   # 16661

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Add to MetaMask

FieldValue
Network name0G Mainnet
New RPC URLhttps://evmrpc.0g.ai
Chain ID16661
Currency symbol0G
Block explorer URLhttps://chainscan.0g.ai

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Production checklist

Before sending real workloads to mainnet:
  • ✅ Run the same code paths on testnet successfully
  • ✅ Switch to a paid RPC provider for higher throughput and reliability
  • ✅ Set up monitoring on broker.ledger.get_ledger() so you don’t run out of funds mid-flight
  • ✅ Consider auto-funding for unattended services
  • ✅ Verify provider attestations with verify_service before sending sensitive prompts
  • ✅ Use persistent API keys instead of ephemeral session tokens for long-lived servers

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Next steps

Testnet

Develop and test against the Galileo testnet first.

Account Management

Fund and manage your mainnet ledger.