*Generated from `cast tempo login --help`; see [CLI reference versions](/reference/versions). Regenerate this page instead of editing it directly.*

## cast tempo login

Authorize a new access key against your Tempo wallet via wallet.tempo.

Persists the key to `$TEMPO_HOME/wallet/keys.toml` (default
`~/.tempo/wallet/keys.toml`). Also runs automatically on a 402 from a Tempo RPC
when no local key is configured.

Env: `TEMPO_HOME`, `TEMPO_CLI_AUTH_URL` (override auth service).

:::terminal
```bash
$ cast tempo login --help
```

```txt
Usage: cast tempo login [OPTIONS]

Options:
      --chain-id <CHAIN_ID>
          Chain ID to authorize the key for. Defaults to Tempo mainnet (4217)
          
          [default: 4217]

      --no-browser
          Print the authorization URL to stderr instead of opening a browser

  -h, --help
          Print help (see a summary with '-h')

  -j, --threads <THREADS>
          Number of threads to use. Specifying 0 defaults to the number of
          logical cores
          
          [aliases: --jobs]

Display options:
      --color <COLOR>
          The color of the log messages

          Possible values:
          - auto:   Intelligently guess whether to use color output (default)
          - always: Force color output
          - never:  Force disable color output

      --json
          Format log messages as JSON

      --md
          Format log messages as Markdown

  -q, --quiet
          Do not print log messages

  -v, --verbosity...
          Verbosity level of the log messages.
          
          Pass multiple times to increase the verbosity (e.g. -v, -vv, -vvv).
          
          Depending on the context the verbosity levels have different meanings.
          
          For example, the verbosity levels of the EVM are:
          - 2 (-vv): Print logs for all tests.
          - 3 (-vvv): Print execution traces for failing tests.
          - 4 (-vvvv): Print execution traces for all tests, and setup traces
          for failing tests.
          - 5 (-vvvvv): Print execution and setup traces for all tests,
          including storage changes and
            backtraces with line numbers.
```
:::