The 9Router GitHub repo lives at decolua/9router, published open source under the MIT licence, and its README makes a blunt pitch: unlimited free AI coding, achieved by connecting Claude Code, Codex, Cursor, Cline, Copilot and Antigravity to free Claude, GPT and Gemini models across more than 40 providers. That is the entire project in one line — a local router that sits between the coding tools you already use and every model source you can legitimately reach.
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You will also see the project written as NymRouter — said aloud as Nine Router — same tool, same repository. I have had it running on my own machine for weeks, wired into my daily coding pipeline, so this is me reading the repo the way I would want it read for me: what it ships, what the README openly admits, and where my hands-on numbers differ from the documentation.
What the 9Router GitHub Repo Actually Ships
Strip the tagline down and the 9Router repo makes three concrete promises. The first is the connect list: it hooks Claude Code, Codex, Cursor, Cline, GitHub Copilot and Antigravity into free Claude, GPT and Gemini models routed through 40-plus providers. The second is auto-fallback. The third is a token saver called RTK that most visitors scroll straight past, and should not.
The fallback system is the clever part. The README calls it Smart 3-Tier Fallback: requests route through Subscription providers first, then Cheap, then Free, and 9Router switches automatically the moment a quota exhausts or a provider throws errors. The stated design goal is zero downtime — your coding agent never stalls because one upstream ran dry.
RTK is the feature I would happily have paid for on its own. It compresses tool outputs — git diff, grep, ls and tree — before they reach the model, and the repo claims a 20 to 40 per cent saving on input tokens per request. It is on by default, so every 9Router user burns through free quotas noticeably slower without touching a setting. For the day-to-day workflow built on these features, my how to use 9Router guide walks through it screen by screen.
Reading the 9Router Repo Like a Buyer
Most people star a repository, skim the badges and move on. The 9Router README rewards a slower read, because the two sections that matter most — the provider breakdown and the warnings — tell you precisely what you are signing up for before you install anything.
The Provider Breakdown: 5 Subscription, 3 Free-Tier, 20-Plus API-Key
The repo splits its providers into three buckets. Five subscription providers — Claude Code, Codex, GitHub Copilot, Cursor and Antigravity — cover the paid seats you may already own. Three free-tier providers follow: Kiro, OpenCode Free and Vertex AI. Then more than 20 API-key providers sit on top, and across the whole roster the README lists over 100 models. The split matters because it shows 9Router is not conjuring free compute from thin air; it aggregates access you already hold — OAuth sessions, existing subscriptions, live free tiers — and routes between them intelligently. My full 9Router review covers what that feels like after weeks of real use.
If you want the exact 9Router configuration I run — provider order, fallback tiers and the coding prompts I push through it — I share the lot inside AI Profit Lab, where my working free-AI coding stacks get posted first. Rather talk it through one-to-one? Book a free SEO strategy session and I will map it against your own projects.
The Warnings Section Is the Most Trustworthy Part
Here is what sold me on the project's honesty: the README volunteers its own bad news. Kiro's free tier is capped at 50 credits a month. OpenCode Free's model list fluctuates, with some models free only during promotions. The iFlow, Qwen Code and Gemini CLI free tiers were discontinued in 2026, and the repo says so plainly instead of leaving dead providers dressed up as live ones. It even flags that the dashboard's cost display is an estimate for tracking purposes only — 9Router itself never charges you a penny. A free-tools project that documents the limits of its own free tiers is rare, and I count it as a point firmly in 9Router's favour.
Install Routes at a Glance
The README documents three ways in, and the npm route is genuinely a one-liner. Run npm install -g 9router, then run 9router, and the dashboard opens at localhost port 20128. That is the entire install for most people — no new accounts, no card details, nothing leaving your machine.
The other two routes exist for tinkerers. There is a from-source route, where you clone the repository and build 9Router yourself, and a Docker route for anyone who prefers the router containerised — both documented step by step at decolua/9router on GitHub, so I will not retype them here. If you want screenshots of every stage, including what the dashboard shows on first launch, my 9Router install walkthrough has them all.
The Repo Lists 100-Plus Models. My Install Counted 573-Plus
Here is where my hands-on numbers part company with the documentation — in a good way. The 9Router GitHub README lists 100-plus models across its providers. When I opened my own install's dashboard and counted, it showed 573-plus models across the 40-plus providers connected. Both figures are honest: the repo describes what it commits to supporting, whilst my count reflects what a live install surfaces once providers report their full catalogues. I log checks like this on Goldie Bench, where I keep receipts for every tool claim I test, and this gap is the pleasant kind — the project undersells itself.
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Why Open Source Matters for a Tool Like This
A router occupies the most sensitive spot in your workflow: every prompt, every file diff and every credential passes through it. That is exactly why I would not run a closed-source one. 9Router is MIT-licensed, so the code sits on GitHub for anyone to audit, fork or fix. It installs into a folder on your machine, runs entirely on localhost, and wires into OAuth sessions you already have rather than demanding new accounts or credits. Nothing routes through somebody else's server. If you want the plumbing explained — how a local proxy intercepts your coding tool's traffic and redirects it — my 9Router proxy explainer breaks it down properly.
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Where 9Router Fits in My Stack
Inside my Agent OS setup, 9Router lives in the free-coder tab alongside OmniRoute, and the two-router pattern is deliberate: one router active, one on the bench, so a bad update never halts the pipeline. If you are weighing the pair against each other, my 9Router vs OmniRoute comparison explains when I reach for each. The single highest-value wiring job, though, is connecting 9Router to Claude Code — that combination handles most of my daily coding, with the Smart 3-Tier Fallback quietly absorbing every quota wall behind the scenes.
9Router GitHub Repo at a Glance
| Repo fact | Detail |
|---|---|
| Repository | decolua/9router, also written NymRouter |
| Licence | MIT — open source |
| Pitch | Unlimited free AI coding via free Claude, GPT and Gemini models |
| Tools connected | Claude Code, Codex, Cursor, Cline, GitHub Copilot, Antigravity |
| Providers | 40+ total: 5 subscription, 3 free-tier, 20+ API-key |
| Models | 100+ listed in the README; 573+ showing on my install |
| Fallback | Smart 3-Tier: Subscription, then Cheap, then Free — automatic switching, zero-downtime design |
| RTK token saver | Compresses git diff, grep, ls and tree outputs; saves 20-40% input tokens; on by default |
| Install | npm install -g 9router, then 9router; source and Docker routes in the README |
| Dashboard | Opens at localhost port 20128 |
| Cost | 9Router never charges; dashboard cost figures are estimates for tracking |
9Router FAQ
Where is the 9Router GitHub repo?
At decolua/9router on GitHub — the official repository, sometimes seen under the NymRouter name. The README, install routes, provider breakdown and warnings all live there.
Is 9Router open source?
Yes. The repo carries the MIT licence, meaning anyone can read, fork, modify and redistribute the code. Paired with the localhost-only design, that makes 9Router fully auditable.
Is 9Router really free?
The router itself never charges — the README states plainly that the dashboard's cost figures are estimates for tracking only. What varies is the providers behind it: Kiro caps its free tier at 50 credits a month, OpenCode Free's list shifts with promotions, and several free tiers were discontinued in 2026. 9Router routes around those limits; it does not abolish them.
What coding tools does 9Router connect?
Per the repo: Claude Code, Codex, Cursor, Cline, GitHub Copilot and Antigravity, all routed to free Claude, GPT and Gemini models across more than 40 providers.
Should I install 9Router via npm or Docker?
Both are documented, but npm is the one-liner: npm install -g 9router, then 9router, and the dashboard opens at localhost port 20128. I would only reach for Docker or the from-source build if I were containerising a setup or contributing code.
My Verdict
The 9Router GitHub repo does the two things I ask of any open-source AI tool: it makes a bold claim, then documents the catches itself. MIT licence, local-first design, a fallback system built for zero downtime, an on-by-default token saver, and a README honest enough to list its own discontinued providers. My install surfaces more models than the docs promise, not fewer. Star it, install it, and read the warnings section before you build a workflow on any single free tier.
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