# X_ENV_MISSING

## Means

required environment variables are missing or invalid

## Typical cause

a key absent at boot; validation runs before the server listens

## Fix

`x env check --json`, then set the keys it names. There is no `--fix`: `x env` declares `check` and `example` and no flags of its own ([`packages/cli/src/cmd-env.ts`](https://github.com/developerz-ai/ultimate/blob/main/packages/cli/src/cmd-env.ts)), so the flagged form dies at the parser with `X_CLI_BAD_FLAG`

[Config and environment](/error-codes#config-and-environment)