Building GoRoute: An Ultra-Lightweight (<15MB RAM) LLM Gateway in Go

Description and use

GoRoute is a compiled Go LLM gateway that uses under 6 MB RAM, starts instantly, and provides automatic failover, round‑robin routing, and one‑click setup for multiple terminal coding agents.

Problem

Developers using terminal coding agents often run an LLM router to manage rate limits, multiple accounts, and model failovers, but existing solutions like OmniRoute and LiteLLM require 150–300 MB RAM and introduce cold‑start latency.

Outcome

GoRoute delivers a sub‑15 MB memory footprint, instant startup, automatic 429 failover, dual protocol translation, and one‑click agent setup, outperforming heavier Node.js/Python routers.

Workflow

• 1. Install GoRoute via curl or npm. 2. Run goroute setup all to configure supported agents. 3. Optionally import existing OmniRoute credentials with goroute import-omniroute. 4. Start the proxy and use http://127.0.0.1:8128 as the endpoint for agents. 5. Monitor status with goroute status.
• 6. Agents send requests to GoRoute, which forwards them to the appropriate AI provider, handling 429 failover and round‑robin across keys.

Evidence

Most developers using terminal coding agents like Claude Code, OpenCode, Codex, or Cursor end up running an LLM router in the background to handle rate limits, multiple accounts, and model failovers.

Source

Popular tools like OmniRoute and LiteLLM work, but running a full Node.js or Python runtime 24/7 just to proxy HTTP requests consumes 150MB to 300MB of RAM and introduces cold-start latency.

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I wanted something that idles at < 6MB RAM, starts instantly, and never panics. So I built GoRoute.

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GoRoute is a zero-dependency, compiled LLM gateway and multi-agent router written in Go.

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Sub-15MB Memory Footprint: Compiles to a single 16MB binary with zero external dependencies. Idles under 6MB RAM.

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goroute setup all

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goroute import-omniroute

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