Limitbreak

Limitbreak is a local proxy for Claude Code that automatically switches accounts when hitting usage limits without restarting sessions.

Limitbreak is a local proxy written in Go that sits between the Claude CLI and Anthropic's API. When Anthropic returns a 429 indicating a 5-hour or weekly usage limit rejection, the proxy holds that account until its reset time and immediately replays the request on the next account. It preserves the active session history, local Model Context Protocol (MCP) servers, connectors, and artifacts by only routing /v1/messages requests over secondary tokens. Tokens are accessed securely via macOS Keychain or credentials files and refreshed directly through Claude Code. It runs on macOS and Linux, requiring no external dependencies beyond a single binary using standard libraries.

Limitbreak at a glance

Best for: Software engineer
Runs on: macOS, Linux, CLI, open source
Pricing: Free
Released: October 2026
Category: AI coding tool
Website: github.com/radu2lupu/limitbreak

Key features

Automatic request replay across accounts upon 5-hour or weekly rate limit rejection
Session history preservation without needing CLI restarts
Isolated routing of /v1/messages requests while preserving MCP and connectors
Account credential reading directly from macOS Keychain or credentials files
Sub-directory account management via ~/.claude-* configuration paths
Automatic token refresh delegation to Claude Code
Path-based account routing for external clients and agents via custom prefixes
Terminal arcade battle simulation mode to test switching logic

Use it for

Preventing interrupted coding workflows in Claude Code when usage limits are reached
Distributing API message volume across multiple Claude subscription logins on one machine
Assigning distinct Claude accounts to specific external tools or agents

Companions

Tools that articles about Limitbreak recommend using with it, each with its job.

Claude Code — Built to work with Claude Code.
Claude — Built to work with Claude.
Context7 — Provides up-to-date documentation for AI agents and code editors.
Playwright MCP — Enables LLMs to interact with web pages using structured accessibility snapshots.
GitHub MCP Server — Reads pull requests, issues and code search on GitHub.
Superpowers — Brainstorm, plan and execute skills for bigger tasks.

Alternatives to Limitbreak

Claude Code Session Tracker — Monitor Claude Code usage limits and token history in a single local interface.
mcp-router — Reduces Claude Code tokens by 13% to 44% using tool search and JSON shaping
CCS — Run multiple accounts simultaneously and avoid session limits with zero configuration.
Claude Code Proxy — Runs Anthropic-compatible clients with Gemini or OpenAI models.
Wirepane — Debugs web and mobile traffic directly inside Claude Code without a separate proxy app.
Catnap — It prevents mid-task interruptions by letting Claude finish its current piece of work before compacting.
Claude Passnote — Direct inter-agent messaging across multiple computers without manual relay.
SuperClaude — Adds 30 slash commands and 8 MCP servers to Claude Code.
Claude Handoff Revive — Avoids replaying 100k+ tokens of conversation history after hitting usage limits.
Auto Handoff — Saves cache costs by writing a handoff file before idle sessions expire.
Claude Code Mode — Reduces context token usage by returning only the final program result.
Claude Ban Clean — It creates timestamped backups and calculates SHA-256 hashes before cleaning.

All Limitbreak alternatives