How I turned fragmented LLM quotas into one larger token budget with an MCP server

Short summary

The author built @mrrlin-dev/external-agents, an MCP server that lets coding agents like Codex and Claude Code route work across multiple LLM providers through a single interface. It turns fragmented per-provider quotas into one larger effective token budget, enabling cost-efficient routing of simple tasks to cheaper models and reducing rate-limit interruptions. The server acts as a control plane so agents don't need custom fallback logic per provider.

• •MCP server routes requests across multiple LLM providers through one interface
• •Pools fragmented quotas into a single effective token budget for better cost efficiency
• •Eliminates per-workflow fallback logic by centralizing provider routing

Generated with AI, which can make mistakes.