CLAUDE_CODE_WEB_SEARCH_FAST_ARG

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_WEB_SEARCH_FAST_ARG is a Claude Code environment variable. Added between v2.1.269 and v2.1.283 and still present in v2.1.295. It is not in the official reference.

Status	Present in v2.1.295
Added	Added between v2.1.269 and v2.1.283
Category	Shell and tools
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_WEB_SEARCH_FAST_ARG=<value>
claude

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

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

Related variables

CLAUDE_CODE_WEB_SEARCH_REFILLS_PER_HOUR: Sets how many web-search budget refills accrue per hour, overriding the value the feature gate serves.
CLAUDE_CODE_DISABLE_WEB_FETCH: Turns off the WebFetch tool.
CLAUDE_CODE_MAX_WEB_SEARCHES_PER_SESSION: Per-session ceiling on WebSearch tool calls (default 200), gated by a web_search_session_cap.
ENABLE_TOOL_SEARCH: Tool search/deferred loading: auto, true, false, or 0–100%.
BASH_MAX_OUTPUT_LENGTH: Max bash output character length.
CLAUDE_BASH_MAINTAIN_PROJECT_WORKING_DIR: Maintain consistent working directory across commands.
CLAUDE_BASH_NO_LOGIN: Replaced by CLAUDE_CODE_SHELL_PREFIX.
CLAUDE_CODE_BASH_EDIT_DIFF

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_WEB_SEARCH_FAST_ARG?

Added between v2.1.269 and v2.1.283 and still present in v2.1.295.

How do I set CLAUDE_CODE_WEB_SEARCH_FAST_ARG?

Export it before starting Claude Code (export CLAUDE_CODE_WEB_SEARCH_FAST_ARG=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.