Blaxel CLI

A CLI to manage Blaxel cloud resources from the command line: agents, sandboxes, jobs, MCP servers, drives, and more.

Prerequisites

The bl command must be available on PATH. To check:

bl version

If not installed, install via the official install script:

curl -fsSL https://raw.githubusercontent.com/blaxel-ai/toolkit/main/install.sh | sh

Or via Homebrew:

brew tap blaxel-ai/blaxel && brew install blaxel

After installation, log in to your workspace:

bl login my-workspace

Global Flags

All commands support these flags:

Non-Interactive Mode

For commands that prompt for input (confirmations, selections), add -y or --yes to auto-confirm. This is required when running in non-interactive / no-TTY environments (scripts, CI, agents).

Available Commands

bl apply       # Apply configuration changes to resources declaratively using YAML files.
bl chat        # Start an interactive chat session with a deployed agent.
bl connect     # Open an interactive terminal session to a sandbox
bl delete      # Delete Blaxel resources from your workspace.
bl deploy      # Deploy your Blaxel project to the cloud.
bl drive       # Manage drives and drive mounts on sandboxes.
bl fork        # Create a new sandbox or application by forking an existing sandbox.
bl get         # Retrieve information about Blaxel resources in your workspace.
bl login       # Authenticate with Blaxel to access your workspace.
bl logout      # Remove stored credentials for a workspace.
bl logs        # View logs for Blaxel resources.
bl new         # Create a new Blaxel resource from templates.
bl push        # Build and push a container image to the Blaxel registry without creating a deployment.
bl run         # Execute a Blaxel resource with custom input data.
bl serve       # Start a local development server for your Blaxel project.
bl share       # Share Blaxel resources with other workspaces in your account.
bl token       # Retrieve the authentication token for the specified workspace.
bl unshare     # Remove shared Blaxel resources from other workspaces.
bl upgrade     # Upgrade the Blaxel CLI to the latest version.
bl version     # Print the version number
bl workspaces  # List and manage Blaxel workspaces.

Reference Documentation

• [apply](references/apply.md) - Apply configuration changes to resources

declaratively using YAML files.

• [chat](references/chat.md) - Start an interactive chat session with a deployed

agent.

• [connect](references/connect.md) - Open an interactive terminal session to a

sandbox

• [delete](references/delete.md) - Delete Blaxel resources from your workspace.
• [deploy](references/deploy.md) - Deploy your Blaxel project to the cloud.
• [drive](references/drive.md) - Manage drives and drive mounts on sandboxes.
• [fork](references/fork.md) - Create a new sandbox or application by forking an

existing sandbox.

• [get](references/get.md) - Retrieve information about Blaxel resources in your

workspace.

• [login](references/login.md) - Authenticate with Blaxel to access your

workspace.

• [logout](references/logout.md) - Remove stored credentials for a workspace.
• [logs](references/logs.md) - View logs for Blaxel resources.
• [new](references/new.md) - Create a new Blaxel resource from templates.
• [push](references/push.md) - Build and push a container image to the Blaxel

registry without creating a deployment.

• [run](references/run.md) - Execute a Blaxel resource with custom input data.
• [serve](references/serve.md) - Start a local development server for your

Blaxel project.

• [share](references/share.md) - Share Blaxel resources with other workspaces in

your account.

• [token](references/token.md) - Retrieve the authentication token for the

specified workspace.

• [unshare](references/unshare.md) - Remove shared Blaxel resources from other

workspaces.

• [upgrade](references/upgrade.md) - Upgrade the Blaxel CLI to the latest

version.

• [version](references/version.md) - Print the version number
• [workspaces](references/workspaces.md) - List and manage Blaxel workspaces.

Discovering Options

To see available subcommands and flags, run --help on any command:

bl --help
bl deploy --help
bl get --help
bl get agents --help

Common Workflows

Create a sandbox, run a command, and get its logs

# 1. Create a sandbox with bl apply
bl apply -f - <<EOF
apiVersion: blaxel.ai/v1alpha1
kind: Sandbox
metadata:
  name: my-sandbox
spec:
  runtime:
    image: blaxel/base-image:latest
    memory: 2048
  lifecycle:
    expirationPolicies:
      - type: ttl-idle
        value: 1h       # Delete after 1 hour of inactivity. Units: h, d, w
        action: delete
EOF

# 2. Retrieve sandbox configuration
bl get sandbox my-sandbox

# 3. Execute a command in the sandbox and get stdout of the command
bl run sandbox my-sandbox --path /process --data '{"command": "echo hello world", "name": "my-cmd", "waitForCompletion": true}'

# 4. Retrieve the logs for that command in case stdout was not sufficient
bl logs sandbox my-sandbox my-cmd

Run a complex command in a sandbox (agent guideline)

bl run sandbox ... --path /process --data '<json>' requires the JSON payload to survive shell quoting. As soon as the command embeds nested quotes, backslashes, multiple lines, or interpreters like sh -lc / python3 -c, inline --data becomes brittle and the API rejects the request with 400 Bad Request: invalid character ... in string escape code.

Decision rule for an agent:

1. Command has no single quotes, no backslashes, no newlines → use

--data '{"command": "...", "waitForCompletion": true}' directly.

1. Anything more complex (nested quotes, escapes, multiline, scripts) → **write

the JSON payload to a file** with your Write/file-creation tool (this bypasses the shell entirely), then run with --file.

# Step 1 — agent writes /tmp/process.json with content like:
# {
#   "command": "sh -lc 'python3 -c \"print(\\\"hello\\\")\"'",
#   "name": "cve-check",
#   "waitForCompletion": true
# }
#
# Step 2 — execute it
bl run sandbox my-sandbox --path /process --file /tmp/process.json

Deploy an agent

bl new agent my-agent
cd my-agent
bl serve --hotreload    # Test locally
bl deploy               # Deploy to cloud
bl chat my-agent        # Chat with it

Manage sandboxes

bl get sandboxes                    # List all
bl get sandbox my-sandbox --watch   # Watch status
bl connect sandbox my-sandbox       # Interactive terminal
bl logs sandbox my-sandbox --follow # Stream logs
bl delete sandbox my-sandbox        # Clean up

Multi-workspace deployment

bl workspaces dev     # Switch to dev
bl deploy             # Deploy to dev
bl workspaces prod    # Switch to prod
bl deploy             # Deploy to prod