CLAUDE_SSH_VERSION

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_SSH_VERSION is a Claude Code environment variable. Added between v2.1.143 and v2.1.212 and still present in v2.1.295. It is not in the official reference.

Status	Present in v2.1.295
Added	Added between v2.1.143 and v2.1.212
Category	Other
Official docs	Not listed

How to set it

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

export CLAUDE_SSH_VERSION=<value>
claude

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

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

Related variables

CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION: Environment runner version.
CLAUDE_CODE_VERSION: Exposes the CLI version to subprocesses, hooks, and MCP servers.
CLAUDE_CODE_DESKTOP_APP_VERSION
CLAUDE_SSH_LOCAL_BINARY
ANTHROPIC_BETAS: Comma-separated beta feature headers.
ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
ANTHROPIC_FEDERATION_RULE_ID
ANTHROPIC_ORGANIZATION_ID

Frequently asked questions

Which Claude Code version has CLAUDE_SSH_VERSION?

Added between v2.1.143 and v2.1.212 and still present in v2.1.295.

How do I set CLAUDE_SSH_VERSION?

Export it before starting Claude Code (export CLAUDE_SSH_VERSION=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.