Command reference

All commands support the --json flag for machine-readable output.

Authentication

Log in to Lark via your browser. Opens the dashboard authorization page, and the CLI receives your session token automatically.

lark login

Your session is saved to ~/.lark/config.json.

`lark logout`

Log out and clear the stored session.

lark logout

`lark whoami`

Show the currently logged-in user.

lark whoami
# Riley Dutton (riley@example.com)

Configuration

`lark config set-project <id>`

Set the default project for all commands. The project is verified before saving.

lark config set-project my-game

`lark config show`

Show current configuration.

lark config show
# Default project: my-game

Projects

`lark projects list`

List all your projects.

lark projects list

`lark projects create <name>`

Create a new project. The name is converted to a DNS-compatible project ID automatically.

lark projects create "My Game"
# Created project: my-game

`lark projects show [id]`

Show project details including settings, secret key, and database counts. Uses the default project if id is omitted.

lark projects show

Flag	Description
`--project <id>`	Override the default project.

`lark projects update [id]`

Update project settings. At least one setting flag is required.

lark projects update --auto-create true --ephemeral false

Flag	Description
`--name <name>`	Project name.
`--ephemeral <bool>`	Enable/disable ephemeral mode.
`--auto-create <bool>`	Enable/disable auto-create databases.
`--firebase-project-id <id>`	Firebase project ID for auth token validation.
`--project <id>`	Override the default project.

`lark projects delete [id]`

Delete a project and all its databases. This is irreversible.

lark projects delete --confirm my-game

Flag	Description
`--confirm <id>`	Required. Pass the project ID to confirm deletion.
`--project <id>`	Override the default project.

`lark projects regenerate-secret [id]`

Regenerate the project secret key. The old key is immediately invalidated.

lark projects regenerate-secret

Flag	Description
`--project <id>`	Override the default project.

Databases

lark databases can be shortened to lark db.

`lark db list`

List databases in the current project.

lark db list
lark db list --search game --limit 10

Flag	Description
`--search <query>`	Filter databases by ID.
`--limit <n>`	Max results (default: 50).
`--offset <n>`	Number of results to skip (default: 0).
`--project <id>`	Override the default project.

`lark db create <id>`

Create a new database.

lark db create game-state

Flag	Description
`--project <id>`	Override the default project.

`lark db delete <id>`

Delete a database and all its data. This is irreversible.

lark db delete game-state

Flag	Description
`--project <id>`	Override the default project.

Data

All data commands require a database ID and most require a path. Paths start with /.

`lark data get <database> <path>`

Read data at a path.

lark data get game-state /players/alice
# {"name": "Alice", "score": 42}

Flag	Description
`--project <id>`	Override the default project.

`lark data set <database> <path> <value>`

Overwrite data at a path. Use - as the value to read from stdin.

lark data set game-state /players/alice '{"name": "Alice", "score": 0}'

# From stdin
cat alice.json | lark data set game-state /players/alice -

Flag	Description
`--project <id>`	Override the default project.

`lark data update <database> <path> <value>`

Shallow merge data at a path. Existing keys not in the payload are preserved. Use - for stdin.

lark data update game-state /players/alice '{"score": 99}'

Flag	Description
`--project <id>`	Override the default project.

`lark data push <database> <path> <value>`

Push data with an auto-generated key. Returns the generated key. Use - for stdin.

lark data push game-state /messages '{"text": "Hello!", "sender": "alice"}'
# -Nabc123def

Flag	Description
`--project <id>`	Override the default project.

`lark data delete <database> <path>`

Delete data at a path.

lark data delete game-state /players/alice

Flag	Description
`--project <id>`	Override the default project.

`lark data export <database> [path]`

Export data as JSON. Path defaults to / (entire database).

# Export entire database to a file
lark data export game-state -o backup.json

# Export a subtree to stdout
lark data export game-state /players

Flag	Description
`-o, --output <file>`	Write to a file instead of stdout.
`--project <id>`	Override the default project.

`lark data import <database> [path]`

Import data from a JSON file. Path defaults to /. This overwrites data at the target path.

lark data import game-state -f backup.json
lark data import game-state /players -f players.json

Flag	Description
`-f, --file <file>`	Required. JSON file to import.
`--project <id>`	Override the default project.

Import overwrites all data at the target path. If you import to /, the entire database is replaced.

`lark data watch <database> <path>`

Stream real-time changes as Server-Sent Events. Press Ctrl+C to stop.

lark data watch game-state /players

Output:

[put] {"path":"/","data":{"alice":{"name":"Alice","score":42}}}
[patch] {"path":"/alice/score","data":99}

With --json, outputs newline-delimited JSON (one object per line):

lark data watch game-state /players --json

{"event":"put","data":{"path":"/","data":{"alice":{"name":"Alice","score":42}}}}
{"event":"patch","data":{"path":"/alice/score","data":99}}

Flag	Description
`--project <id>`	Override the default project.

Security rules

`lark rules get [id]`

Get the current security rules for a project. Uses the default project if id is omitted.

lark rules get

Flag	Description
`--project <id>`	Override the default project.

`lark rules set [id]`

Set security rules from a file or stdin. Supports JSON5 (comments and trailing commas). Uses the default project if id is omitted.

# From a file
lark rules set -f rules.json

# From stdin
cat rules.json | lark rules set

Flag	Description
`-f, --file <file>`	Rules file to upload.
`--project <id>`	Override the default project.

Monitoring

`lark dashboard [id]`

Show project metrics. Uses the default project if id is omitted. Defaults to the last 24 hours.

lark dashboard
lark dashboard --start 2026-02-01 --end 2026-02-15

Displays:

Current: CCU, peak CCU, bytes in/out, reads/writes, permission denials
Summary: Peak CCU, total bandwidth, total operations, average latency
Recent events: Last 10 events

Flag	Description
`--start <date>`	Start date (ISO format).
`--end <date>`	End date (ISO format).
`--project <id>`	Override the default project.

`lark events [id]`

Show project events (connections, errors, warnings). Uses the default project if id is omitted.

lark events
lark events --limit 50

Flag	Description
`--limit <n>`	Max results (default: 25).
`--offset <n>`	Number of results to skip (default: 0).
`--project <id>`	Override the default project.

`lark billing [id]`

Show billing information. Uses the default project if id is omitted. Defaults to the current billing period.

lark billing
lark billing --period 2026-01

Displays: period start, peak CCU, total bandwidth, total storage.

Flag	Description
`--period <month>`	Billing period in `YYYY-MM` format.
`--project <id>`	Override the default project.

Global flags

These flags work with every command:

Flag	Description
`--json`	Output results as machine-readable JSON.
`--project <id>`	Override the default project for this command.

Configuration file

The CLI stores its configuration in ~/.lark/config.json. This file is created automatically when you run lark login and contains your session token and default project setting.

# View your config
lark config show

# Set default project
lark config set-project my-game

You generally don’t need to edit this file directly.

​Command reference

​Authentication

​lark login

​lark logout

​lark whoami

​Configuration

​lark config set-project <id>

​lark config show

​Projects

​lark projects list

​lark projects create <name>

​lark projects show [id]

​lark projects update [id]

​lark projects delete [id]

​lark projects regenerate-secret [id]

​Databases

​lark db list

​lark db create <id>

​lark db delete <id>

​Data

​lark data get <database> <path>

​lark data set <database> <path> <value>

​lark data update <database> <path> <value>

​lark data push <database> <path> <value>

​lark data delete <database> <path>

​lark data export <database> [path]

​lark data import <database> [path]

​lark data watch <database> <path>

​Security rules

​lark rules get [id]

​lark rules set [id]

​Monitoring

​lark dashboard [id]

​lark events [id]

​lark billing [id]

​Global flags

​Configuration file

Command reference

Authentication

`lark login`

`lark logout`

`lark whoami`

Configuration

`lark config set-project <id>`

`lark config show`

Projects

`lark projects list`

`lark projects create <name>`

`lark projects show [id]`

`lark projects update [id]`

`lark projects delete [id]`

`lark projects regenerate-secret [id]`

Databases

`lark db list`

`lark db create <id>`

`lark db delete <id>`

Data

`lark data get <database> <path>`

`lark data set <database> <path> <value>`

`lark data update <database> <path> <value>`

`lark data push <database> <path> <value>`

`lark data delete <database> <path>`

`lark data export <database> [path]`

`lark data import <database> [path]`

`lark data watch <database> <path>`

Security rules

`lark rules get [id]`

`lark rules set [id]`

Monitoring

`lark dashboard [id]`

`lark events [id]`

`lark billing [id]`

Global flags

Configuration file