CLAUDE_CODE_PROGRAM_USE_CASE_ID

Updated November 2, 2026 by Alex Sorokoletov

CLAUDE_CODE_PROGRAM_USE_CASE_ID is a Claude Code environment variable: Sets the program use case id attached to requests; it must be 1 to 128 characters of letters, digits, underscore or hyphen, and is ignored if it fails that check or the feature is off. Added between v2.1.315 and v2.1.317 and still present in v2.1.317. It is not in the official reference.

Status	Present in v2.1.317
Added	Added between v2.1.315 and v2.1.317
Category	Other
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_PROGRAM_USE_CASE_ID=<value>
claude

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

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

Related variables

CLAUDE_CODE_USE_CCR_V2: Use Claude Code Router v2 for cowork sessions.
CLAUDE_CODE_USE_GATEWAY: Routes traffic through an Anthropic-operated gateway (with loopback and log-level tuning).
USE_BUILTIN_RIPGREP: Force use of built-in ripgrep.
CLAUDE_CODE_USE_NATIVE_FILE_SEARCH
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

What does CLAUDE_CODE_PROGRAM_USE_CASE_ID do?

Sets the program use case id attached to requests; it must be 1 to 128 characters of letters, digits, underscore or hyphen, and is ignored if it fails that check or the feature is off.

Which Claude Code version has CLAUDE_CODE_PROGRAM_USE_CASE_ID?

Added between v2.1.315 and v2.1.317 and still present in v2.1.317.

How do I set CLAUDE_CODE_PROGRAM_USE_CASE_ID?

Export it before starting Claude Code (export CLAUDE_CODE_PROGRAM_USE_CASE_ID=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.