> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nebulaonchain.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Networks

> Testnet and mainnet are twin ledgers with separate agents, policy, and MCP hosts.

# Networks

Nebula runs **two fully separate ledgers**. Agents, wallets, policy, treasury, and history do not cross between them.

| Host                                                           | Ledger                              |
| -------------------------------------------------------------- | ----------------------------------- |
| [testnet.nebulaonchain.xyz](https://testnet.nebulaonchain.xyz) | Testnet (default for trying Nebula) |
| [mainnet.nebulaonchain.xyz](https://mainnet.nebulaonchain.xyz) | Mainnet                             |
| [nebulaonchain.xyz](https://nebulaonchain.xyz)                 | Marketing landing only              |

## Twin isolation

|                             | Testnet              | Mainnet                           |
| --------------------------- | -------------------- | --------------------------------- |
| Agents                      | Own rows and wallets | Separate agents (not auto-cloned) |
| Policy / treasury / history | `network=testnet`    | `network=mainnet`                 |
| Blend                       | Testnet pools (XLM)  | Mainnet pools (XLM and USDC)      |
| TrustLine / Fianza credit   | Available            | Not enabled                       |

Switch networks with the dashboard **NetworkChip**. You sign in again on the other host.

## MCP host binding

Tokens are minted on a specific host. Set `NEBULA_HUB` (stdio) or the remote MCP URL to **that same host**.

```text theme={null}
# Token from testnet Connect
NEBULA_HUB=https://testnet.nebulaonchain.xyz
POST https://testnet.nebulaonchain.xyz/mcp

# Token from mainnet Connect
NEBULA_HUB=https://mainnet.nebulaonchain.xyz
POST https://mainnet.nebulaonchain.xyz/mcp
```

<Warning>
  Do not call `/mcp` on the apex domain. Apex product routes redirect to testnet and can drop `Authorization` headers.
</Warning>