> ## Documentation Index
> Fetch the complete documentation index at: https://umbra.0xcreator.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# config set

> Set a CLI-wide configuration value.

```bash theme={null}
umbra config set <key> <value>
```

Writes a single key-value pair to `~/.umbra-cli/config.json`. The file is created if it doesn't exist. All other keys are preserved.

## Arguments

| Argument  | Description                         |
| --------- | ----------------------------------- |
| `<key>`   | Config key to set. See table below. |
| `<value>` | Value to assign.                    |

## Config keys

| Key                        | Accepted values                 | Description                                             |
| -------------------------- | ------------------------------- | ------------------------------------------------------- |
| `network`                  | `mainnet`, `devnet`, `localnet` | Solana network to connect to                            |
| `rpcUrl`                   | Any URL                         | HTTP RPC endpoint                                       |
| `rpcSubscriptionsUrl`      | Any URL                         | WebSocket RPC endpoint                                  |
| `indexerApiEndpoint`       | Any URL                         | Umbra indexer API base URL (required for UTXO commands) |
| `deferMasterSeedSignature` | `true`, `false`                 | Delay the master seed signing prompt until first use    |
| `activeUser`               | Any user name                   | Active user (prefer `user use` for this)                |

## Examples

```bash theme={null}
umbra config set network mainnet
umbra config set rpcUrl https://rpc.helius.xyz/?api-key=YOUR_KEY
umbra config set rpcSubscriptionsUrl wss://rpc.helius.xyz/?api-key=YOUR_KEY
umbra config set indexerApiEndpoint https://indexer.api.umbraprivacy.com
umbra config set deferMasterSeedSignature true
```

## Output

```
✓ network = mainnet
```

## See also

* [`config get`](/commands/config/get) — read current config values