claude-code-proxy

claude-code-proxy lets you use Claude Code with your ChatGPT Plus/Pro subscription, your Kimi Code (kimi.com) account, or Cursor Agent.

Quick start · Providers · How it works · Configuration · Limitations

Why?

I feel Claude Code is still the best harness around, despite occasional frustrations caused by updates. However, Anthropic keeps tightening the usage limits, while OpenAI is still much more generous.

If you want to use OpenAI plans, your best options seem to be OpenCode and Codex. I tried OpenCode, but the UX has many rough edges, especially around skills feeling like a second-class feature. Fortunately it's open source and I ended up forking it and applying some patches, but would much rather not do it.

Quick start

1. Install

Homebrew (macOS and Linux):

brew install raine/claude-code-proxy/claude-code-proxy

Install script (macOS and Linux):

curl -fsSL https://raw.githubusercontent.com/raine/claude-code-proxy/main/scripts/install.sh | bash

Manual: download a prebuilt binary for your platform from the releases page. Windows artifacts are published as claude-code-proxy-windows-amd64.zip and claude-code-proxy-windows-arm64.zip; extract the .exe somewhere on your PATH.

2. Pick a provider and authenticate

The proxy supports three upstream providers. Pick one and run its login flow; the proxy will refuse to start traffic until a token is stored.

Codex (ChatGPT Plus/Pro):

claude-code-proxy codex auth login     # browser OAuth (PKCE)
# or, on a headless machine:
claude-code-proxy codex auth device    # device-code flow

Sign in with your ChatGPT Plus/Pro account, not an OpenAI API account.

Kimi (kimi.com Kimi Code):

claude-code-proxy kimi auth login      # device-code flow (prints URL + code)

Sign in with your kimi.com account. The verification URL is displayed; open it in any browser, confirm the code, and the CLI polls until done.

Cursor Agent:

claude-code-proxy cursor auth login
claude-code-proxy cursor auth status

Cursor authentication uses Cursor's browser login, but the proxy stores its own tokens. It does not read Cursor Agent's Keychain/auth.json. You can also set CCP_CURSOR_AUTH_TOKEN for the proxy process.

On macOS credentials go to Keychain. On Windows they are written under %APPDATA%\claude-code-proxy\<provider>\auth.json; on Linux they are written under ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/<provider>/auth.json (mode 0600 where supported). Set CCP_CONFIG_DIR before cursor auth login to store a separate Cursor login at $CCP_CONFIG_DIR/cursor/auth.json.

Verify:

claude-code-proxy codex auth status
claude-code-proxy kimi auth status
claude-code-proxy cursor auth status

3. Start the proxy

claude-code-proxy serve                # listens on 127.0.0.1:18765
PORT=11435 claude-code-proxy serve     # change the listen port
claude-code-proxy serve --no-monitor   # plain logs instead of the monitor TUI

Binds to 127.0.0.1 only. One serve process handles all providers — the upstream for each request is chosen from ANTHROPIC_MODEL. When stdout is a terminal, serve opens a monitor TUI with sessions, active requests, recent requests, and error events. Use --no-monitor for plain terminal output.

4. Point Claude Code at it

ANTHROPIC_MODEL selects the provider:

gpt-5.5, gpt-5.4, gpt-5.3-codex, gpt-5.3-codex-spark, gpt-5.4-mini, gpt-5.2 → codex
kimi-for-coding, kimi-k2.6, k2.6 → kimi
cursor, cursor-plan, cursor-ask, composer-2.5, composer-2.5-fast, cursor:<model-id>, cursor-plan:<model-id>, cursor-ask:<model-id> → cursor

An unknown model returns a 400 listing the supported ids. There is no implicit default provider.

Claude Code also issues background requests (session title generation, token counts) against its built-in "small/fast" haiku model id. Those requests would 400 because no provider claims it, so set ANTHROPIC_SMALL_FAST_MODEL to a concrete id too (the same value as ANTHROPIC_MODEL is usually fine):

# Codex
ANTHROPIC_BASE_URL=http://localhost:18765 \
ANTHROPIC_AUTH_TOKEN=unused \
ANTHROPIC_MODEL=gpt-5.5[1m] \
ANTHROPIC_SMALL_FAST_MODEL=gpt-5.4-mini[1m] \
CLAUDE_CODE_AUTO_COMPACT_WINDOW=272000 \
CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1 \
CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK=1 \
  claude

# Kimi
ANTHROPIC_BASE_URL=http://localhost:18765 \
ANTHROPIC_AUTH_TOKEN=unused \
ANTHROPIC_MODEL=kimi-for-coding[1m] \
ANTHROPIC_SMALL_FAST_MODEL=kimi-for-coding[1m] \
CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1 \
CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK=1 \
  claude

# Cursor Agent
ANTHROPIC_BASE_URL=http://localhost:18765 \
ANTHROPIC_AUTH_TOKEN=unused \
ANTHROPIC_MODEL=cursor \
ANTHROPIC_SMALL_FAST_MODEL=cursor \
CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1 \
CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK=1 \
  claude

CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK=1 is recommended because the proxy always talks to upstream providers with streaming requests, even when it accumulates a non-streaming Anthropic response for Claude Code. Disabling Claude Code's streaming-to-non-streaming fallback avoids retrying a partially completed stream in a way that can duplicate tool calls.

Or set it persistently in ~/.claude/settings.json:

{
  "env": {
    "ANTHROPIC_BASE_URL": "http://127.0.0.1:18765",
    "ANTHROPIC_AUTH_TOKEN": "unused",
    "ANTHROPIC_MODEL": "gpt-5.5[1m]",
    "ANTHROPIC_SMALL_FAST_MODEL": "gpt-5.4-mini[1m]",
    "CLAUDE_CODE_AUTO_COMPACT_WINDOW": 272000,
    "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": 1,
    "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": 1
  }
}

5. Context window size

Claude Code decides auto-compaction based on the model's context window. For unknown models, Claude Code uses its own fallback context size. The [1m] suffix is a local Claude Code hint that raises that compaction threshold. It is useful only when the upstream model can actually handle a window that large.

Use the [1m] suffix for Codex and Kimi models so Claude Code uses a larger local compaction threshold, such as gpt-5.5[1m], gpt-5.4-mini[1m], or kimi-for-coding[1m]. The proxy strips a trailing [1m] before sending the request upstream. The suffix affects Claude Code's local compaction decision and does not increase the upstream model's context window.

Official Codex metadata reports gpt-5.5 with a 272K-token window, not a 1M window. Set CLAUDE_CODE_AUTO_COMPACT_WINDOW=272000 with gpt-5.5[1m] so Claude Code does not compact too early, while still compacting before the real upstream limit.

If you'd rather disable auto-compact completely, set DISABLE_AUTO_COMPACT=1 in your env or ~/.claude/settings.json. Manual /compact still works, but you risk hitting real upstream limits before Claude Code can compact for you.

Toggling between proxy and direct Anthropic

If you still have an Anthropic subscription you want to fall back to, you can put a small wrapper in front of claude that only injects the proxy env vars when a flag file exists, plus a toggle script to flip the flag. Leave ~/.claude/settings.json free of proxy env vars so direct-to-Anthropic remains the default.

~/.local/bin/claude (ahead of the real claude on PATH):

#!/bin/bash
# Wrapper that optionally routes to claude-code-proxy.
# Active when ~/.claude/claude-code-proxy-enabled exists.

if [ -f "$HOME/.claude/claude-code-proxy-enabled" ]; then
    export ANTHROPIC_BASE_URL="http://localhost:18765"
    export ANTHROPIC_AUTH_TOKEN="unused"
    export ANTHROPIC_MODEL="gpt-5.5[1m]"
    export ANTHROPIC_SMALL_FAST_MODEL="gpt-5.4-mini[1m]"
    export CLAUDE_CODE_AUTO_COMPACT_WINDOW="272000"
    export CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC="1"
    export CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK="1"
fi

exec "$HOME/.local/bin/claude" "$@"

Adjust the exec path if the real claude binary lives elsewhere on your system (e.g. $(bun pm bin -g)/claude, $HOME/.claude/local/claude).

claude-proxy-toggle (anywhere on your PATH):

#!/bin/bash
# Toggle claude-code-proxy routing for the claude wrapper.
set -euo pipefail

flag="$HOME/.claude/claude-code-proxy-enabled"

if [ -f "$flag" ]; then
    rm "$flag"
    echo "proxy: off"
else
    mkdir -p "$(dirname "$flag")"
    touch "$flag"
    echo "proxy: on"
fi

Run claude-proxy-toggle to flip between routing through the proxy (Codex / Kimi) and talking to Anthropic directly. New or continued claude sessions pick up the change immediately; existing sessions keep whatever they started with.

Providers

Codex (ChatGPT)

Upstream: https://chatgpt.com/backend-api/codex/responses (Responses API).

Set ANTHROPIC_MODEL to a model your ChatGPT subscription is allowed to use. Append -fast to a Codex model name to request Codex fast mode for that request without restarting the proxy. For example, gpt-5.5-fast is sent upstream as model gpt-5.5 with service_tier: "priority". An explicit codex.serviceTier / CCP_CODEX_SERVICE_TIER override still takes precedence.

Reasoning effort: Claude Code's output_config.effort value (the one you see in the UI as ◐ medium · /effort) is forwarded as Codex reasoning.effort (low / medium / high / xhigh). Claude Code's max value is sent upstream as xhigh. An explicit codex.effort / CCP_CODEX_EFFORT override still takes precedence and can also force none.

Reasoning summaries: when a Codex request has reasoning effort, the proxy asks Codex for reasoning.summary: "auto" and translates returned summary deltas into Anthropic thinking content blocks. Codex decides when a summary is useful, so simple prompts can emit no thinking block. Set codex.reasoningSummary / CCP_CODEX_REASONING_SUMMARY to off or none to suppress summaries while keeping reasoning.effort and encrypted continuation content.

Claude Code's hosted web_search_20250305 tool is translated to Codex's native Responses web_search tool, including non-empty domain filters. Codex hosted search calls are emitted back to Claude Code as Anthropic server_tool_use and web_search_tool_result blocks with usage.server_tool_use.web_search_requests so Claude Code can account for completed searches.

Confirmed working on Plus:

gpt-5.4
gpt-5.3-codex

Also verified:

gpt-5.2
gpt-5.4-mini

If the resolved model isn't supported by your account, upstream returns a 400 like "The 'gpt-4.1' model is not supported when using Codex with a ChatGPT account.". The proxy surfaces that verbatim.

Auth:

Command	What it does
`codex auth login`	Browser OAuth (PKCE) via `auth.openai.com`
`codex auth device`	Device-code OAuth for headless machines
`codex auth status`	Show account ID + token expiry
`codex auth logout`	Delete stored credentials

Kimi (Kimi Code)

Upstream: https://api.kimi.com/coding/v1/chat/completions (OpenAI-style chat-completions).

Only one wire model is exposed: kimi-for-coding (its display name in kimi-cli is Kimi-k2.6, 256k context, supports reasoning + image input + video input). kimi-k2.6 and k2.6 are accepted as aliases for the same wire id.

Reasoning effort: Claude Code's output_config.effort value (the one you see in the UI as ◐ medium · /effort) is forwarded as Kimi's reasoning_effort (low / medium / high). Thinking blocks from the upstream model are forwarded to Claude Code and rendered as thinking content. If Claude Code disables thinking, the proxy drops both reasoning_effort and the thinking: {type: "enabled"} flag before forwarding.

Auth:

Command	What it does
`kimi auth login`	Device-code OAuth via `auth.kimi.com`
`kimi auth status`	Show user ID + token expiry
`kimi auth logout`	Delete stored credentials

Cursor Agent

Upstream: https://api2.cursor.sh/agent.v1.AgentService/Run (Cursor Agent's HTTP/2 full-duplex Connect protocol). The captured HTTP/1 fallback is RunSSE plus /aiserver.v1.BidiService/BidiAppend; the provider now uses the primary HTTP/2 stream.

Supported proxy model ids:

cursor, cursor-agent: Cursor default model selection
cursor-plan: Cursor default model selection with AGENT_MODE_PLAN
cursor-ask: Cursor default model selection with AGENT_MODE_ASK
cursor-composer, composer-2.5: Cursor Composer 2.5
cursor-composer-fast, composer-2.5-fast: Cursor Composer 2.5 fast mode
cursor:<model-id>: force any Cursor Agent model id through Cursor
cursor-plan:<model-id>: same model with Cursor AGENT_MODE_PLAN
cursor-ask:<model-id>: same model with Cursor AGENT_MODE_ASK

The prefixed forms are the recommended way to select Cursor's full model catalog. They avoid collisions with other proxy providers, for example gpt-5.2 can remain a Codex model while cursor:gpt-5.2 forces Cursor. The catalog advertised by /v1/models is generated from cursor-agent --list-models; unknown future ids are still accepted with cursor:<raw-model>.

Claude Code's /effort setting is mapped onto Cursor catalog ids when the selected Cursor model exposes matching effort variants. For example, ANTHROPIC_MODEL=cursor:gpt-5.5 plus /effort high requests gpt-5.5-high, while /effort max picks the strongest available catalog variant such as xhigh, extra-high, or high. Explicit effort model ids such as cursor:gpt-5.5-low are respected as-is, -fast is preserved when available, and models without effort variants (for example cursor:gemini-3.1-pro in the captured catalog) are left unchanged.

Plan mode can also be selected per request with metadata:

{
  "metadata": {
    "cursor_mode": "plan"
  }
}

Cursor continuation maps Claude Code's x-claude-code-session-id to a Cursor conversation id in memory. To resume an existing Cursor chat explicitly, set metadata.cursor_chat_id, metadata.cursorChatId, metadata.cursor_resume, or metadata.cursorResume to the Cursor chat id. The observed Cursor session id is recorded back into the session map when Cursor returns it.

Auth:

Command	What it does
`cursor auth login`	Browser login and proxy-owned Cursor token storage
`cursor auth status`	Shows proxy-owned Cursor credential source and token expiry
`cursor auth logout`	Clears proxy-owned Cursor credentials

How it works

sequenceDiagram
    autonumber
    participant CC as Claude Code
    participant P as claude-code-proxy
    participant AUTH as OAuth host / credential store
    participant U as Upstream API<br/>(Codex, Kimi, or Cursor)

    Note over P,AUTH: One-time: PKCE / device OAuth<br/>tokens cached locally for reuse

    CC->>P: POST /v1/messages (Anthropic shape, stream: true)

    alt access token expiring
        P->>AUTH: POST /oauth/token (refresh_token)
        AUTH-->>P: new access (+ rotated refresh)
    end

    P->>P: translate request<br/>• strip Anthropic-only fields<br/>• system blocks → instructions / system message<br/>• tool_use / tool_result ↔ provider-specific shapes<br/>• prompt_cache_key = session id
    P->>U: POST upstream<br/>Bearer + provider-specific headers
    U-->>P: provider stream<br/>(Codex/Kimi SSE, Cursor Connect frames)
    P->>P: reducer: typed events<br/>(thinking / text / tool start/delta/stop, finish)
    P-->>CC: Anthropic SSE<br/>(message_start, content_block_*, message_delta, message_stop)

Commands

Command	Description
`serve`	Start the proxy and monitor
`codex auth login` / `device` / `status` / `logout`	Codex OAuth management
`kimi auth login` / `status` / `logout`	Kimi OAuth management
`cursor auth login` / `status` / `logout`	Cursor OAuth management

`serve`

Starts the HTTP proxy and blocks. Binds to 127.0.0.1 only. When stdout is a terminal, serve opens a monitor TUI showing sessions, active requests, recent requests, token throughput, and error events. Use --no-monitor to run with plain terminal output.

Logs are written to the platform state directory and rotated at 20 MiB. Set CCP_LOG_STDERR=1 to mirror log lines to stderr while running without the monitor.

claude-code-proxy serve
PORT=11435 claude-code-proxy serve
claude-code-proxy serve --no-monitor
CCP_LOG_STDERR=1 claude-code-proxy serve --no-monitor

The plain server banner prints the supported model to provider mapping on startup. One serve process dispatches to any provider based on the model field in each request. Requests whose model isn't registered with any provider are rejected with HTTP 400 listing the supported ids.

Codex auth commands

`codex auth login`

Runs the PKCE browser flow against auth.openai.com using the Codex CLI's client ID. Prints a URL, opens a local callback listener on port 1455, waits for the browser to redirect back, and stores the resulting access / refresh tokens in Keychain on macOS or locally on other platforms. The process exits automatically once the tokens are saved.

claude-code-proxy codex auth login

Sign in with your ChatGPT Plus/Pro account, not an OpenAI API account. The token file includes the extracted chatgpt_account_id so the proxy can set the ChatGPT-Account-Id header on every upstream call.

`codex auth device`

Same OAuth flow, but for headless machines. Prints a short user code and a URL; you enter the code from any browser on any other device, and the CLI polls auth.openai.com until you authorize, then stores the token.

claude-code-proxy codex auth device

Useful over SSH, inside a container, or on any host that can't open a browser.

`codex auth status`

Shows whether credentials are stored, the account ID, and how long until the access token expires. Non-zero exit if no auth is present.

claude-code-proxy codex auth status

Example output:

Account: 79342a5e-57b7-44ea-bfdc-a83ba070dad6
Expires: 2026-04-28T16:46:04.827Z (in 863946s)
Storage: macOS Keychain

The proxy refreshes the access token 5 minutes before expiry with a single-flight guard, so concurrent requests never trigger stampedes of refresh calls.

`codex auth logout`

Removes stored auth credentials. On macOS this deletes the Keychain entry. No server call is needed; the refresh token just becomes dead.

claude-code-proxy codex auth logout

Run codex auth login again to re-authenticate.

Kimi auth commands

`kimi auth login`

Runs a device-code OAuth flow (RFC 8628) against auth.kimi.com using the kimi-cli client ID. Prints a verification URL and a short user code; open the URL in any browser, confirm the code, and the CLI polls until the tokens are issued. Tokens are stored in Keychain on macOS or a mode-0600 file elsewhere.

claude-code-proxy kimi auth login

Sign in with your kimi.com account. The access token has a ~15 minute lifetime; the proxy refreshes it 5 minutes before expiry with a single-flight guard and persists the rotated refresh token.

A persistent device ID is generated on first login next to the Kimi auth file and reused forever — it's bound into the issued JWT, so rotating it would invalidate your token.

`kimi auth status`

claude-code-proxy kimi auth status

Shows the user ID extracted from the token, expiry time, scope, and storage backend. Non-zero exit if no auth is present.

`kimi auth logout`

claude-code-proxy kimi auth logout

Removes stored auth credentials (Keychain entry on macOS, file elsewhere). Run kimi auth login again to re-authenticate.

Cursor auth commands

`cursor auth login`

claude-code-proxy cursor auth login

Starts Cursor's browser login flow, polls api2.cursor.sh/auth/poll, and stores the resulting Cursor access/refresh tokens in the proxy's own auth store. The proxy does not read or write Cursor Agent's Keychain/auth.json.

`cursor auth status`

claude-code-proxy cursor auth status

Shows whether Cursor credentials were discovered, the source, user/email claims when present, and token expiry. Non-zero exit if no auth is present.

`cursor auth logout`

claude-code-proxy cursor auth logout

Clears Cursor credentials from the discovered local auth store. Run claude-code-proxy cursor auth login again to re-authenticate.

Endpoints

The proxy speaks enough of the Anthropic API for Claude Code:

POST /v1/messages: the main turn endpoint (streaming and non-streaming)
POST /v1/messages?beta=true: same (Claude Code always sends ?beta=true)
POST /v1/messages/count_tokens: local token count via gpt-tokenizer (o200k_base); used by Claude Code's compaction logic
GET /healthz: liveness check

Configuration

Settings can come from either environment variables or a config.json file. Precedence per setting: env var > config file > built-in default. The config file is optional — env-var-only setups continue to work unchanged.

The file lives at ~/.config/claude-code-proxy/config.json on macOS (deliberately not ~/Library), at %APPDATA%\claude-code-proxy\config.json on Windows, and at ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/config.json on Linux. Set CCP_CONFIG_DIR to use a separate config and auth directory for that process.

{
  "port": 18765,
  "aliasProvider": "codex",
  "codex": {
    "originator": "claude-code-proxy",
    "userAgent": "claude-code-proxy/dev",
    "model": "gpt-5.4",
    "effort": "medium",
    "reasoningSummary": "auto",
    "serviceTier": "fast",
    "baseUrl": "https://chatgpt.com/backend-api/codex/responses",
    "transport": "websocket",
    "previousResponseId": false
  },
  "kimi": {
    "userAgent": "KimiCLI/1.37.0",
    "oauthHost": "https://auth.kimi.com",
    "baseUrl": "https://api.kimi.com/coding/v1"
  },
  "cursor": {
    "baseUrl": "https://api2.cursor.sh",
    "clientVersion": "cli-2026.06.04-5fd875e",
    "agentBundle": "/path/to/cursor-agent/index.js"
  },
  "log": {
    "stderr": false,
    "verbose": false
  }
}

Variable	Config key	Default	Purpose
`PORT`	`port`	`18765`	Proxy listen port
`CCP_CONFIG_DIR`	unset	platform config dir	Per-process config directory; Cursor auth uses it for file storage
`XDG_STATE_HOME`	—	`~/.local/state`	Linux/macOS base dir for `proxy.log`
`CCP_LOG_STDERR`	`log.stderr`	unset	Also mirror log lines to stderr; any env value enables it
`CCP_LOG_VERBOSE`	`log.verbose`	unset	Preserve full string fields in `proxy.log`; any env value enables it
`CCP_TRAFFIC_LOG`	—	unset	Write full per-request traffic captures under `traffic/` for session debugging (`1`, `true`, or `yes`)
`CCP_ALIAS_PROVIDER`	`aliasProvider`	`codex`	Route Anthropic-style aliases (`haiku`, `sonnet`, `opus`, `claude-*`) through `codex` or `kimi`
`CCP_KIMI_OAUTH_HOST`	`kimi.oauthHost`	`https://auth.kimi.com`	Override Kimi's OAuth host (debugging only)
`CCP_KIMI_BASE_URL`	`kimi.baseUrl`	`https://api.kimi.com/coding/v1`	Override Kimi's API base URL
`CCP_CODEX_MODEL`	`codex.model`	unset	Force all Codex requests to this model (`gpt-5.2`, `gpt-5.3-codex`, `gpt-5.3-codex-spark`, `gpt-5.4`, `gpt-5.4-mini`, `gpt-5.5`)
`CCP_CODEX_EFFORT`	`codex.effort`	unset	Force all Codex requests to this reasoning effort (`none`, `low`, `medium`, `high`, `xhigh`)
`CCP_CODEX_REASONING_SUMMARY`	`codex.reasoningSummary`	unset	Request Codex reasoning summaries when reasoning effort is enabled; `off` and `none` suppress summaries
`CCP_CODEX_SERVICE_TIER`	`codex.serviceTier`	unset	Force all Codex requests to this service tier (`fast`/`priority`, `flex`; `fast` is sent upstream as `priority`)
`CCP_CODEX_BASE_URL`	`codex.baseUrl`	`https://chatgpt.com/backend-api/codex/responses`	Override the Codex Responses endpoint
`CCP_CODEX_TRANSPORT`	`codex.transport`	`websocket`	Codex transport: `websocket`, `http`, or `auto`
`CCP_CODEX_PREVIOUS_RESPONSE_ID`	`codex.previousResponseId`	`false`	Enable WebSocket continuation with `previous_response_id` when the request is append-only
`CCP_CODEX_ORIGINATOR`	`codex.originator`	`claude-code-proxy`	Override the `originator` header sent to Codex
`CCP_CODEX_USER_AGENT`	`codex.userAgent`	`claude-code-proxy/<version>`	Override the `User-Agent` header sent to Codex
`CCP_KIMI_USER_AGENT`	`kimi.userAgent`	`KimiCLI/1.37.0`	Override the `User-Agent` header sent to Kimi
`CCP_CURSOR_BASE_URL`	`cursor.baseUrl`	`https://api2.cursor.sh`	Override Cursor's API base URL
`CCP_CURSOR_CLIENT_VERSION`	`cursor.clientVersion`	`cli-2026.06.04-5fd875e`	Override Cursor client version headers
`CCP_CURSOR_AGENT_BUNDLE`	`cursor.agentBundle`	auto-detected	Path to Cursor Agent's bundled `index.js` used only for protobuf schemas
`CCP_CURSOR_AUTH_TOKEN`	—	unset	Use this Cursor bearer token instead of local claude-code-proxy Cursor auth storage
`CCP_ORIGINATOR`	—	`claude-code-proxy`	Fallback for `CCP_CODEX_ORIGINATOR`
`CCP_USER_AGENT`	—	unset	Fallback for `CCP_CODEX_USER_AGENT` and `CCP_KIMI_USER_AGENT`

A malformed config.json is reported on stderr and ignored; defaults are used in its place. Invalid types for individual keys are warned and skipped without affecting other keys.

Codex uses the WebSocket Responses transport by default. Set CCP_CODEX_TRANSPORT=http to use the older HTTP SSE transport for debugging or compatibility, or CCP_CODEX_TRANSPORT=auto to try WebSocket with HTTP fallback only when setup fails before a request is sent upstream. CCP_CODEX_PREVIOUS_RESPONSE_ID=1 enables opt-in WebSocket continuation for append-only turns. Continuation keeps in-memory state keyed by Claude Code session id, reuses a session WebSocket while it remains open, and sends previous_response_id only when the translated request shape is unchanged and the new input strictly extends the previous transcript. On mismatch, missing state, missing upstream response, closed connections, or setup failure, the proxy clears unsafe continuation state and sends the full request instead. Continuation reduces repeated request upload size, but it does not increase the upstream model context window. Multi-process or load-balanced deployments need sticky sessions or shared state before enabling continuation.

Files

proxy.log — JSON-lines log, rotated at 20 MiB. It lives at $XDG_STATE_HOME/claude-code-proxy/proxy.log on macOS/Linux and at %LOCALAPPDATA%\claude-code-proxy\proxy.log on Windows (falling back to %USERPROFILE%\AppData\Local). Secrets (authorization, access, refresh, id_token, ChatGPT-Account-Id, …) are redacted before write.
errors/ - failed proxy responses captured as JSON files under the state directory. request_failed log lines include an errorFile path for copying the complete redacted error payload into debugging notes or an AI prompt.
traffic/ — per-request captures written when CCP_TRAFFIC_LOG=1 is set. Captures live under the state directory, grouped by Claude Code session and request sequence. They include inbound Anthropic requests, translated upstream requests, upstream headers, upstream events, and downstream events. Stream events are written under each request's events/ directory with monotonic sequence numbers so sorted filenames preserve emission order. Token and account headers are redacted, but prompt and tool content are intentionally preserved for debugging. For the most complete debugging run, use CCP_LOG_STDERR=1 CCP_LOG_VERBOSE=1 CCP_TRAFFIC_LOG=1.
config.json — optional configuration file (see table above). It lives at ~/.config/claude-code-proxy/config.json on macOS, ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/config.json on Linux, and %APPDATA%\claude-code-proxy\config.json on Windows. CCP_CONFIG_DIR replaces the platform config directory for the current process.
Codex tokens — macOS uses Keychain under service claude-code-proxy.codex. Linux uses ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/codex/auth.json. Windows uses %APPDATA%\claude-code-proxy\codex\auth.json.
Kimi tokens — macOS uses Keychain under service claude-code-proxy.kimi. Linux uses ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/kimi/auth.json. Windows uses %APPDATA%\claude-code-proxy\kimi\auth.json.
Kimi device ID — persistent UUID bound into the Kimi JWT at login. Linux uses ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/kimi/device_id; Windows uses %APPDATA%\claude-code-proxy\kimi\device_id. Reused for the lifetime of the install.
Cursor tokens — macOS uses Keychain under service claude-code-proxy.cursor. Linux uses ${XDG_CONFIG_HOME:-$HOME/.config}/claude-code-proxy/cursor/auth.json. Windows uses %APPDATA%\claude-code-proxy\cursor\auth.json. When CCP_CONFIG_DIR is set, Cursor tokens are written to cursor/auth.json under that directory, including on macOS. CCP_CURSOR_AUTH_TOKEN overrides local proxy-owned storage.

Limitations

Terms of service: using the Codex, Kimi, or Cursor backends from a non-official client is a gray area. Use at your own risk.
Rate limits: shared across all clients of your upstream account. Codex's codex.rate_limits.limit_reached and Kimi's HTTP 429 are both surfaced as HTTP 429 with retry-after.
Codex — image inputs in tool results: Responses API function_call_output only takes a string, so image blocks nested inside tool_result are replaced with a [image omitted: <media_type>] placeholder. Top-level user-message images pass through.
Kimi — image inputs in tool results: pass through as image_url parts (Kimi accepts them in role:"tool" content).
Codex — reasoning blocks: not forwarded to Claude Code (dropped), even if the upstream model produced them.
Kimi — reasoning blocks: forwarded as Anthropic thinking content blocks and rendered by Claude Code. Disable by setting thinking: {"type":"disabled"} in your Anthropic request.
Session title generation: Claude Code's parallel title-gen request is forwarded upstream like any other structured-output request. This costs a handful of tokens per session rather than being stubbed.
Codex — output_config.format: translated to Responses API text.format (json_schema with strict: true); other Anthropic-specific output_config fields are dropped.
Cursor — protobuf bundle dependency: the provider speaks Cursor's underlying protocol directly, but reuses the installed Cursor Agent bundle's generated protobuf classes. Set CCP_CURSOR_AGENT_BUNDLE if auto-detection cannot find cursor-agent.
Cursor — tool round-trips: text, thinking, plan mode, ask mode, auth, and session continuation are implemented. Full Cursor workspace/tool callbacks are captured and documented under history/, but not yet implemented as Claude tool round-trips.

Development

cargo run -- serve                         # run locally (routes all providers)
cargo test --all                           # run tests
cargo fmt --all --check                    # check formatting
cargo clippy --all-targets -- -D warnings  # lint
just check                                 # run the full project check

Smoke coverage

See docs/smoke-cutover.md for automated smoke tests, optional real-auth validation steps, known transport differences, and the current Rust support scope.

Install a compiled dev build globally: compile the current working tree to a binary and place it on your PATH without linking:

cargo install --path . --locked

Related projects

claude-history: search Claude Code conversation history from the terminal
git-surgeon: non-interactive hunk-level git staging for AI agents
workmux: manage parallel AI coding tasks in separate git worktrees with tmux
consult-llm: Consult other AI models from your agent workflow

Name		Name	Last commit message	Last commit date
Latest commit History 352 Commits
.github/workflows		.github/workflows
docs		docs
hooks		hooks
meta		meta
scripts		scripts
src		src
tests		tests
.gitignore		.gitignore
.workmux.yaml		.workmux.yaml
CHANGELOG.md		CHANGELOG.md
Cargo.lock		Cargo.lock
Cargo.toml		Cargo.toml
LICENSE		LICENSE
README.md		README.md
checkle.toml		checkle.toml
justfile		justfile

Folders and files

Latest commit

History

Repository files navigation

claude-code-proxy

Why?

Quick start

1. Install

2. Pick a provider and authenticate

3. Start the proxy

4. Point Claude Code at it

5. Context window size

Toggling between proxy and direct Anthropic

Providers

Codex (ChatGPT)

Kimi (Kimi Code)

Cursor Agent

How it works

Commands

serve

Codex auth commands

codex auth login

codex auth device

codex auth status

codex auth logout

Kimi auth commands

kimi auth login

kimi auth status

kimi auth logout

Cursor auth commands

cursor auth login

cursor auth status

cursor auth logout

Endpoints

Configuration

Files

Limitations

Development

Smoke coverage

Related projects

About

Resources

License

Uh oh!

Stars

Watchers

Forks

Releases 29

Contributors

Uh oh!

Languages

`serve`

`codex auth login`

`codex auth device`

`codex auth status`

`codex auth logout`

`kimi auth login`

`kimi auth status`

`kimi auth logout`

`cursor auth login`

`cursor auth status`

`cursor auth logout`