OCP — Open Claude Proxy

# OCP — Open Claude Proxy

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> **Already paying for Claude Pro/Max? Use your subscription as an OpenAI-compatible API — $0 extra cost.**

*Open source from day one, used daily by my family, maintained on nights and weekends. If OCP saves you money too, you can [☕ buy me a coffee](https://buymeacoffee.com/dtzp555) — [full story below](#support-ocp).*

*If OCP saves you a setup, a ⭐ helps other folks discover it. Issue reports are even more useful — that's the highest-quality feedback this project gets.*

OCP turns your Claude Pro/Max subscription into a standard OpenAI-compatible API on localhost. Any tool that speaks the OpenAI protocol can use it — no separate API key, no extra billing.

```
Cline          ──┐
OpenCode       ───┤
Aider          ───┼──→ OCP :3456 ──→ Claude CLI ──→ Your subscription
Continue.dev   ───┤
OpenClaw       ───┘
```

One proxy. Multiple IDEs. All models. **$0 API cost.**

## Contents

- [Why OCP?](#why-ocp) · [Supported Tools](#supported-tools)
- [Quickstart](#quickstart)
- [How It Works](#how-it-works)
- Reference: [Available Models](#available-models) · [API Endpoints](#api-endpoints) · [Environment Variables](#environment-variables)
- Modes & operations: [LAN & multi-user](#lan--multi-user) → [`docs/lan-mode.md`](docs/lan-mode.md) · [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) → [`docs/tui-mode.md`](docs/tui-mode.md) · [Upgrading](#upgrading) → [`docs/upgrading.md`](docs/upgrading.md)
- [Built-in Usage Monitoring](#built-in-usage-monitoring) · [Response Cache](#response-cache) · [Structured Outputs](#structured-outputs-openai-response_format) · [Images / Multimodal](#images--multimodal-vision) · [OpenClaw Integration](#openclaw-integration)
- [Troubleshooting](#troubleshooting) → [`docs/troubleshooting.md`](docs/troubleshooting.md)
- [Repository Layout](#repository-layout) · [Security](#security) · [Governance](#governance) · [Support OCP](#support-ocp) · [License](#license)

## Why OCP?

There are several Claude proxy projects. OCP picks a specific lane: **align tightly with what `cli.js` actually does, observe + multiplex what's already there, don't extend the protocol.** What you get:

- **LAN multi-user keys** (v3.7.0) — reach one Claude Pro/Max subscription from your own devices across the LAN. Each device gets a per-key API token (no OAuth session leak), with independent usage tracking and one-line revocation. Pro/Max are **per-user** accounts — see [Sharing with family / a team — honest limits](docs/lan-mode.md#deployment-model--security-read-this) before extending access to other **people**.
- **`ocp-connect` one-shot client setup** — one command on the client machine auto-configures OpenClaw, and detects Cursor, Cline, Continue.dev, and opencode to print ready-to-paste setup hints for each. No hunting for where each tool keeps its `OPENAI_BASE_URL`.
- **Response cache with per-key isolation + singleflight** (v3.13.0). Optional SHA-256 prompt cache, isolated per API key (cross-user pollution is impossible by hash construction, not by application logic), with stampede protection on concurrent identical prompts. Off by default. ([PR #65](https://github.com/dtzp555-max/ocp/pull/65), [PR #66](https://github.com/dtzp555-max/ocp/pull/66))
- **Per-key request quotas** (v3.8.0). Daily / weekly / monthly limits per key — set a kid's iPad to 20/day, a partner's laptop to 100/week. ([PR #18](https://github.com/dtzp555-max/ocp/pull/18))
- **SSE heartbeat for long reasoning** ([v3.12.0](https://github.com/dtzp555-max/ocp/releases/tag/v3.12.0), opt-in). If you've ever watched your IDE die at the 60s idle mark during a long Claude tool-use pause — that's nginx/Cloudflare default behavior. OCP emits an SSE comment frame to keep the connection alive without polluting the response. ([PR #49](https://github.com/dtzp555-max/ocp/pull/49))
- **`cli.js` alignment + CI guardrail.** LLM-assisted code drifts easily — it's tempting to invent plausible-looking endpoints that `cli.js` doesn't actually use. [`ALIGNMENT.md`](./ALIGNMENT.md) is binding: every endpoint OCP exposes must cite a `cli.js` line. The [`alignment.yml`](./.github/workflows/alignment.yml) CI workflow blocks PRs that introduce known-hallucinated tokens. The payoff is boring: your setup keeps working when `cli.js` ships its next minor.
- **`models.json` single source of truth** (v3.11.0). Adding a model is one file edit; both `/v1/models` and the OpenClaw bootstrap derive from it. ([PR #30](https://github.com/dtzp555-max/ocp/pull/30))
- **Drives the official CLI as-is, no binary patching.** OCP spawns the official `claude` CLI (or hosts it in an interactive tmux pane for TUI mo

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