CLAUDE_CODE_CCR_OWN_CONNECTION_POOL

Updated October 23, 2026 by Alex Sorokoletov

CLAUDE_CODE_CCR_OWN_CONNECTION_POOL is a Claude Code environment variable. Added between v2.1.307 and v2.1.309 and still present in v2.1.310. It is not in the official reference.

Status	Present in v2.1.310
Added	Added between v2.1.307 and v2.1.309
Category	Network and proxy
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_CCR_OWN_CONNECTION_POOL=<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_OWN_CONNECTION_POOL": "<value>"
  }
}

Related variables

CLAUDE_CODE_DISABLE_MTLS_RELOAD_ON_STALE_CONNECTION
MCP_CONNECTION_NONBLOCKING: Make MCP connections non-blocking.
MCP_REMOTE_SERVER_CONNECTION_BATCH_SIZE: Remote MCP connection batch size.
MCP_SERVER_CONNECTION_BATCH_SIZE: Concurrent MCP server connections.
CLAUDE_CODE_CCR_EARLY_REMOTE_CONNECT
CLAUDE_CODE_GZIP_CCR_REQUEST_BODIES
CLAUDE_CODE_WEBFETCH_USE_CCR_PROXY
CLAUDE_CODE_WEBSEARCH_USE_CCR_PROXY

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_CCR_OWN_CONNECTION_POOL?

Added between v2.1.307 and v2.1.309 and still present in v2.1.310.

How do I set CLAUDE_CODE_CCR_OWN_CONNECTION_POOL?

Export it before starting Claude Code (export CLAUDE_CODE_CCR_OWN_CONNECTION_POOL=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.