Router

One endpoint. Every model. Always the right one.

A drop-in proxy for Anthropic, OpenAI, and Gemini that picks the best model for every request: using a tiny on-box embedder, not a vibes-based prompt.

Built by Weave: The #1 engineering intelligence platform, loved by Robinhood, PostHog, Reducto, and hundreds of others.

What it does

Point Claude Code, Codex, Cursor, or your own app at localhost:8080. The router:

• 🎯 Routes per action. A cluster scorer derived from Avengers-Pro [^1] picks the right model from your enabled providers, for every upstream API request. (See docs/SEMANTICS.md for the canonical terminology: the router routes per action, not per turn.)
• 🔌 Speaks everyone's API. Anthropic Messages, OpenAI Chat Completions, Gemini native. Streaming, tools, vision, the works.
• 🧠 Knows OSS too. DeepSeek, Kimi, GLM, Qwen, Llama, Mistral via OpenRouter (or any OpenAI-compatible endpoint).
• 🔒 BYOK by default. Provider keys stay on your box, encrypted at rest.
• 📊 Observable. OTLP traces out of the box. See them in the Weave dashboard (http://localhost:8080/ui/dashboard) or drop in Honeycomb, Datadog, Grafana, whatever.

30-second quickstart

The fastest way: point Claude Code, Codex, opencode, or pi at the hosted Weave Router with one command. No clone, no Docker, no Postgres.

npx @weave-os/router

That's it. Your browser opens the hosted setup page. To install directly from the terminal, choose a target explicitly. Other flavors:

npx @weave-os/router --claude              # skip the picker, Claude Code
npx @weave-os/router --codex               # skip the picker, OpenAI Codex CLI
npx @weave-os/router --opencode            # skip the picker, opencode
npx @weave-os/router --pi                  # skip the picker, pi + Loom UI
npx @weave-os/router --scope project       # per-repo, commits settings.json (or .codex/ / opencode.json)
npx @weave-os/router --local               # self-hosted localhost:8080
npx @weave-os/router --base-url https://router.acme.internal
npx @weave-os/router --email you@example.com # set identity without prompting
npx @weave-os/router --claude --return-url https://app.example.com/onboarding # continue after health + key verification
npx @weave-os/router@0.1.0                 # pin a version

Requires Node ≥ 18 (Claude Code, opencode, and pi paths also need jq). Full flag reference: install/npm/README.md.

The npm package is published as @weave-os/router. The former @workweave/router package remains available as a compatibility alias and continues to receive the same releases.

Or: self-host the whole stack

If you want the router (and dashboard) running on your own box:

# 1. Drop a provider key in. OpenRouter is the recommended baseline.
echo "OPENROUTER_API_KEY=sk-or-v1-..." >> .env.local

# 2. Set a dashboard password. Without one, inference still runs but
# dashboard administration is disabled.
echo "ROUTER_ADMIN_PASSWORD=replace-with-a-strong-password" >> .env.local