CLAUDE_CODE_ARTIFACT

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_ARTIFACT is a Claude Code environment variable: Turns on Artifacts, with companions for its API endpoint, direct upload, and MCP exposure. Claude Code can produce a first-class artifact now — and share it over MCP with other tools. Removed in v2.1.292, so current releases ignore it. It is not in the official reference.

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_ARTIFACT=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_ARTIFACT": "<value>"
  }
}

Release notes that mention it

• Claude Code v2.1.209 — Auto Mode Grows Up

Related variables

• CLAUDE_CODE_ARTIFACT_AUTO_OPEN
• CLAUDE_CODE_ARTIFACT_COMMENTS
• CLAUDE_CODE_ARTIFACT_COMMENTS_AUTOREACT
• CLAUDE_CODE_ARTIFACT_DELETE: Enables the delete-Artifact path (owner-only, requires confirmation, blocked in plan mode).
• CLAUDE_CODE_ARTIFACT_PREVIEW_EMULATOR: Pins the artifact-preview emulator on (true) or off (false); left unset, a feature flag decides.
• CLAUDE_CODE_ARTIFACT_VERSIONS: When set, the session can list and read an artifact's earlier versions; without it, a session reports that an artifact's earlier versions are not available.
• CLAUDE_ARTIFACT_HOST_GRANT
• CLAUDE_CODE_ARTIFACT_ASSETS

Frequently asked questions

All variables, searchable: Claude Code environment variables.