dario

Your Claude and ChatGPT subscriptions each live inside their own apps.dario makes them work everywhere, spends the plan before the meter, and keeps the receipt.

npm i -g @askalf/dario or brew install askalf/tap/dario · 0 runtime deps · SLSA-attested every release · nothing phones home · ~42k lines you can read in a weekend · independent, unofficial, third-party (DISCLAIMER.md)

Start · Why dario · Routing · Risk · Reference · Trust · Coming back after a while?

You already pay for Claude,[^plans] for ChatGPT, or both. Each plan spends through its own runtime: Claude Code and the Agent SDK on one side, the ChatGPT app and Codex CLI on the other. Cursor, Aider, Cline, Continue, Zed and your own scripts want a base URL and an API key instead, and an API key is a meter: every token billed again, or, on a Max plan since October 2026, a monthly credit balance that stops when it runs out, while the seat's own windows sit idle.

dario is one local endpoint that puts all of it behind one URL. Point any Anthropic- or OpenAI-compatible tool at http://localhost:3456 and you're done. Each request goes to a seat with headroom. Chain the rest with --pool-fallback and the other plan takes the request when one hits its window, with a metered backend as the last rung if you add one; without a chain, a drained pool returns its honest 429. The ledger prices every request at API rates and shows what each plan absorbed, in the TUI, the dashboard and /metrics.

Start in 60 seconds

npm install -g @askalf/dario      # or: brew install askalf/tap/dario
dario login      # your Claude plan (Pro, Max 5x or Max 20x); `dario login --manual` for SSH / headless
dario proxy      # leave it running, then point any tool at http://localhost:3456 with key `dario`

Anthropic-shaped tools: export ANTHROPIC_BASE_URL=http://localhost:3456 ANTHROPIC_API_KEY=dario. OpenAI-shaped tools use OPENAI_BASE_URL=http://localhost:3456/v1 instead, same key. Every tool that honors those env vars now runs on your subscription.

Works with: Claude Code, Cursor, Aider, Cline, Roo Code, Kilo Code, Continue.dev, Zed, OpenHands, OpenClaw, Hermes, Codex CLI, the Claude Agent SDK, the Anthropic and OpenAI SDKs, curl, your own scripts. Per-tool setup →

Prefer Homebrew? brew install askalf/tap/dario installs the same npm release through a formula that follows the registry (tap); upgrade with brew upgrade dario. Prefer Docker? ghcr.io/askalf/dario:latest, multi-arch (amd64 + arm64), published from the same workflow as every npm release (guide). Something off? dario doctor prints one paste-ready health report.

Why people pick it

• Every tool, one URL. No per-tool keys and no second bill: anything with a base-URL setting runs on the plan you already pay for. Per-tool setup
• Knows who paid. A ledger prices every request at API rates and splits it by plan, by key and by model: what the seats absorbed, what went to extra usage or an API key. In the TUI, the dashboard at /analytics/ui, /analytics, Prometheus /metrics and dario usage. Analytics
• Spends the plan before the meter. Seats with headroom first, then the --pool-fallback chain you configure: the other plan on a 429, a metered rung last (your Max plan's API credits through a Console key, or an openai-compat backend). No chain means no substitution, a drained pool returns its honest 429. Nothing is swapped silently: every substituted response says so in a header. Failover
• Either plan, either wire shape. Your ChatGPT plan behind Claude Code and the Anthropic SDKs; Codex CLI on your Claude plan. Two plans
• Failover that finishes the answer. A 429 on one plan is re-served by the other, and a stream that dies mid-answer is completed on the same model first. Failover
• Many seats, one endpoint. Per-model headroom routing, session-sticky prompt cache, in-flight 429 failover across every seat you hold. New conversations go to the seat with the most headroom by default; --pool-strategy=fill-first fills seats in alias order and expiring-first spends the seat whose weekly window resets soonest. The active strategy shows in the startup banner, GET /status, dario doctor and dario accounts list. The pool
• One key per developer. Named keys with a preferred seat, a model allowlist and a daily budget. Keys
• Tracks Claude Code on its own. Eleven unattended watchers catch wire-shape drift and ship the fix, usually the same day. Drift
• Stops before it costs you. The overage guard halts the proxy the moment a response bills outside your subscription. Guardrails
• Your traffic as the benchmark. Shadow-compare any request against another model and read the results with dario compare. Shadow compare

What it does with a request

You point every tool at one URL. dario reads each request, decides which plan or backend owns it, and forwards it in that backend's native protocol.

The tool doesn't know. The backend doesn't know. dario is the seam.

The full Claude lineup, shortcuts, the live model catalog and when a name is refused: routing.md.

Watch it work

Every proxy serves a dashboard at http://localhost:3456/analytics/ui: