CLAUDE_CODE_CCR_REQUESTS_BY_FETCH

Updated November 9, 2026 by Alex Sorokoletov

CLAUDE_CODE_CCR_REQUESTS_BY_FETCH is a Claude Code environment variable: When set and running as a hosted worker, routes axios requests that use no proxy through Bun's fetch. Added in v2.1.321 and still present in v2.1.321. It is not in the official reference.

Status	Present in v2.1.321
Added	Added in v2.1.321
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_CCR_REQUESTS_BY_FETCH=<value>
claude

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

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

Related variables

CLAUDE_CODE_CCR_EARLY_HYDRATE_PREFETCH: When a remote SDK session is being resumed, triggers early remote work that prefetches and hydrates reads before initialization finishes.
CLAUDE_CODE_CCR_EARLY_SYNC_AFTER_SETTINGS_REFUSAL: When set, still runs the early sync after a settings load fails with an HTTP 403 refusal, instead of taking the default path.
CLAUDE_CODE_CCR_FOLD_FIRST_TURN_RESCAN: When set and plugin startup is still pending, folds the first-turn command rescan into the plugin state refresh instead of running a separate command refresh.
CLAUDE_CODE_CCR_SURFACE: Set to "tag" to include the "claude-tag-plugins" default marketplace in plugin download URLs and in plugin or skill search requests.
CLAUDE_CODE_CCR_WORKER_SOCKET: Comma-separated list; when it contains the matching entry and the process owns its connection, the SDK connection opens its stream through a worker socket.
CLAUDE_CODE_ENTRYPOINT_ON_REQUESTS: Sets the entrypoint name reported on outgoing requests; honored only when the entrypoint is claude-desktop-3p and no name is already set, otherwise ignored.
CLAUDE_CODE_FLAG_FETCH_WAIT_MS: Milliseconds to wait for the feature-flag fetch to return before giving up; defaults to 3000.
CLAUDE_CODE_USE_CCR_V2: Use Claude Code Router v2 for cowork sessions.

Frequently asked questions

What does CLAUDE_CODE_CCR_REQUESTS_BY_FETCH do?

When set and running as a hosted worker, routes axios requests that use no proxy through Bun's fetch.

Which Claude Code version has CLAUDE_CODE_CCR_REQUESTS_BY_FETCH?

Added in v2.1.321 and still present in v2.1.321.

How do I set CLAUDE_CODE_CCR_REQUESTS_BY_FETCH?

Export it before starting Claude Code (export CLAUDE_CODE_CCR_REQUESTS_BY_FETCH=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.