# DS2API [](LICENSE)   [](https://github.com/CJackHwang/ds2api/releases) [](DEPLOY.en.md) [](https://zeabur.com/templates/L4CFHP) [](https://vercel.com/new/clone?repository-url=https://github.com/CJackHwang/ds2api) Language: [中文](README.MD) | [English](README.en.md) DS2API converts DeepSeek Web chat capability into OpenAI-compatible, Claude-compatible, and Gemini-compatible APIs. The backend is a **pure Go implementation**, with a React WebUI admin panel (source in `webui/`, build output auto-generated to `static/admin` during deployment). > **Important Disclaimer** > > This repository is provided for learning, research, personal experimentation, and internal validation only. It does not grant any commercial authorization and comes with no warranty of fitness, stability, or results. > > The author and repository maintainers are not responsible for any direct or indirect loss, account suspension, data loss, legal risk, or third-party claims arising from use, modification, distribution, deployment, or reliance on this project. > > Do not use this project in ways that violate service terms, agreements, laws, or platform rules. Before any commercial use, review the `LICENSE`, the relevant terms, and confirm that you have the author's written permission. ## Architecture Overview ```mermaid flowchart LR Client["🖥️ Clients\n(OpenAI / Claude / Gemini compat)"] subgraph DS2API["DS2API Service"] direction TB CORS["CORS Middleware"] Auth["🔐 Auth Middleware"] subgraph Adapters["Adapter Layer"] OA["OpenAI Adapter\n/v1/*"] CA["Claude Adapter\n/anthropic/*"] GA["Gemini Adapter\n/v1beta/models/*"] end subgraph Support["Support Modules"] Pool["📦 Account Pool / Queue"] PoW["⚙️ PoW WASM\n(wazero)"] end Admin["🛠️ Admin API\n/admin/*"] WebUI["🌐 WebUI\n(/admin)"] end DS["☁️ DeepSeek API"] Client -- "Request" --> CORS --> Auth Auth --> OA & CA & GA OA & CA & GA -- "Call" --> DS Auth --> Admin OA & CA & GA -. "Rotate accounts" .-> Pool OA & CA & GA -. "Compute PoW" .-> PoW DS -- "Response" --> Client ``` - **Backend**: Go (`cmd/ds2api/`, `api/`, `internal/`), no Python runtime - **Frontend**: React admin panel (`webui/`), served as static build at runtime - **Deployment**: local run, Docker, Vercel serverless, Linux systemd ## Key Capabilities | Capability | Details | | --- | --- | | OpenAI compatible | `GET /v1/models`, `GET /v1/models/{id}`, `POST /v1/chat/completions`, `POST /v1/responses`, `GET /v1/responses/{response_id}`, `POST /v1/embeddings` | | Claude compatible | `GET /anthropic/v1/models`, `POST /anthropic/v1/messages`, `POST /anthropic/v1/messages/count_tokens` (plus shortcut paths `/v1/messages`, `/messages`) | | Gemini compatible | `POST /v1beta/models/{model}:generateContent`, `POST /v1beta/models/{model}:streamGenerateContent` (plus `/v1/models/{model}:*` paths) | | Multi-account rotation | Auto token refresh, email/mobile dual login | | Concurrency control | Per-account in-flight limit + waiting queue, dynamic recommended concurrency | | DeepSeek PoW | WASM solving via `wazero`, no external Node.js dependency | | Tool Calling | Anti-leak handling: non-code-block feature match, early `delta.tool_calls`, structured incremental output | | Admin API | Config management, runtime settings hot-reload, account testing/batch test, session cleanup, import/export, Vercel sync, version check | | WebUI Admin Panel | SPA at `/admin` (bilingual Chinese/English, dark mode) | | Health Probes | `GET /healthz` (liveness), `GET /readyz` (readiness) | ## Platform Compatibility Matrix | Tier | Platform | Status | | --- | --- | --- | | P0 | Codex CLI/SDK (`wire_api=chat` / `wire_api=responses`) | ✅ | | P0 | OpenAI SDK (JS/Python, chat + responses) | ✅ | | P0 | Vercel AI SDK (openai-compatible) | ✅ | | P0 | Anthropic SDK (messages) | ✅ | | P0 | Google Gemini SDK (generateContent) | ✅ | | P1 | LangChain / LlamaIndex / OpenWebUI (OpenAI-compatible integration) | ✅ | | P2 | MCP standalone bridge | Planned | ## Model Support ### OpenAI Endpoint | Model | thinking | search | | --- | --- | --- | | `deepseek-chat` | ❌ | ❌ | | `deepseek-reasoner` | ✅ | ❌ | | `deepseek-chat-search` | ❌ | ✅ | | `deepseek-reasoner-search` | ✅ | ✅ | ### Claude Endpoint | Model | Default Mapping | | --- | --- | | `claude-sonnet-4-5` | `deepseek-chat` | | `claude-haiku-4-5` (compatible with `claude-3-5-haiku-latest`) | `deepseek-chat` | | `claude-opus-4-6` | `deepseek-reasoner` | Override mapping via `claude_mapping` or `claude_model_mapping` in config. In addition, `/anthropic/v1/models` now includes historical Claude 1.x/2.x/3.x/4.x IDs and common aliases for legacy client compatibility. #### Claude Code integration pitfalls (validated) - Set `ANTHROPIC_BASE_URL` to the DS2API root URL (for example `http://127.0.0.1:5001`). Claude Code sends requests to `/v1/messages?beta=true`. - `ANTHROPIC_API_KEY` must match an entry in `keys` from `config.json`. Keeping both a regular key and an `sk-ant-*` style key improves client compatibility. - If your environment has proxy variables, set `NO_PROXY=127.0.0.1,localhost,` for DS2API to avoid proxy interception of local traffic. - If tool calls are rendered as plain text and not executed, upgrade to a build that includes multi-format Claude tool-call parsing (JSON/XML/ANTML/invoke). ### Gemini Endpoint The Gemini adapter maps model names to DeepSeek native models via `model_aliases` or built-in heuristics, supporting both `generateContent` and `streamGenerateContent` call patterns with full Tool Calling support (`functionDeclarations` → `functionCall` output). ## Quick Start ### Universal First Step (all deployment modes) Use `config.json` as the single source of truth (recommended): ```bash cp config.example.json config.json # Edit config.json ``` Recommended per deployment mode: - Local run: read `config.json` directly - Docker / Vercel: generate Base64 from `config.json` and inject as `DS2API_CONFIG_JSON` - Compatibility note: `DS2API_CONFIG_JSON` may also contain raw JSON directly; `CONFIG_JSON` is the legacy fallback variable ### Option 1: Local Run **Prerequisites**: Go 1.24+, Node.js 20+ (only if building WebUI locally) ```bash # 1. Clone git clone https://github.com/CJackHwang/ds2api.git cd ds2api # 2. Configure cp config.example.json config.json # Edit config.json with your DeepSeek account info and API keys # 3. Start go run ./cmd/ds2api ``` Default URL: `http://localhost:5001` > **WebUI auto-build**: On first local startup, if `static/admin` is missing, DS2API will auto-run `npm ci` (only when dependencies are missing) and `npm run build -- --outDir static/admin --emptyOutDir` (requires Node.js). You can also build manually: `./scripts/build-webui.sh` ### Option 2: Docker ```bash # 1. Prepare env file cp .env.example .env # 2. Edit .env (at least set DS2API_ADMIN_KEY) # DS2API_ADMIN_KEY=replace-with-a-strong-secret # 3. Start docker-compose up -d # 4. View logs docker-compose logs -f ``` The default `docker-compose.yml` maps host port `6011` to container port `5001`. If you want `5001` exposed directly, adjust the `ports` mapping. Rebuild after updates: `docker-compose up -d --build` #### Zeabur One-Click (Dockerfile) 1. Click the “Deploy on Zeabur” button above to deploy. 2. After deployment, open `/admin` and login with `DS2API_ADMIN_KEY` shown in Zeabur env/template instructions. 3. Import / edit config in Admin UI (it will be written and persisted to `/data/config.json`). Note: when Zeabur builds directly from the repo `Dockerfile`, you do not need to pass `BUILD_VERSION`. The image prefers that build arg when provided, and automatically falls back to the repo-root `VERSION` file when it is absent. ### Option 3: Vercel 1. Fork this repo to your GitHub account 2. Import the project on Vercel 3. Set environment variables (minimum: `DS2API_ADMIN_KEY`; recommended to also set `DS2API_CONFIG_JSON`) 4. Deploy Recommended first step in repo root: ```bash cp config.example.json config.json # Edit config.json ``` Recommended: convert `config.json` to Base64 locally, then paste into `DS2API_CONFIG_JSON` to avoid JSON formatting mistakes: ```bash base64 < config.json | tr -d '\n' ``` > **Streaming note**: `/v1/chat/completions` on Vercel is routed to `api/chat-stream.js` (Node Runtime) for real-time SSE. Auth, account selection, and session/PoW preparation are still handled by the Go internal prepare endpoint; streaming output (including `tools`) is assembled on Node with Go-aligned anti-leak handling. For detailed deployment instructions, see the [Deployment Guide](DEPLOY.en.md). ### Option 4: Download Release Binaries GitHub Actions automatically builds multi-platform archives on each Release: ```bash # After downloading the archive for your platform tar -xzf ds2api__linux_amd64.tar.gz cd ds2api__linux_amd64 cp config.example.json config.json # Edit config.json ./ds2api ``` ### Option 5: OpenCode CLI 1. Copy the example config: ```bash cp opencode.json.example opencode.json ``` 2. Edit `opencode.json`: - Set `baseURL` to your DS2API endpoint (for example, `https://your-domain.com/v1`) - Set `apiKey` to your DS2API key (from `config.keys`) 3. Start OpenCode CLI in the project directory (run `opencode` using your installed method). > Recommended: use the OpenAI-compatible path (`/v1/*`) via `@ai-sdk/openai-compatible` as shown in the example. > If your client supports `wire_api`, test both `responses` and `chat`; DS2API supports both paths. ## Configuration ### `config.json` Example ```json { "keys": ["your-api-key-1", "your-api-key-2"], "accounts": [ { "email": "user@example.com", "password": "your-password" }, { "mobile": "12345678901", "password": "your-password" } ], "model_aliases": { "gpt-4o": "deepseek-chat", "gpt-5-codex": "deepseek-reasoner", "o3": "deepseek-reasoner" }, "compat": { "wide_input_strict_output": true }, "responses": { "store_ttl_seconds": 900 }, "embeddings": { "provider": "deterministic" }, "claude_mapping": { "fast": "deepseek-chat", "slow": "deepseek-reasoner" }, "admin": { "jwt_expire_hours": 24 }, "runtime": { "account_max_inflight": 2, "account_max_queue": 0, "global_max_inflight": 0, "token_refresh_interval_hours": 6 }, "auto_delete": { "sessions": false } } ``` - `keys`: API access keys; clients authenticate via `Authorization: Bearer ` - `accounts`: DeepSeek account list, supports `email` or `mobile` login - `token`: Even if set in `config.json`, it is cleared during load (DS2API does not read persisted tokens from config); runtime tokens are maintained/refreshed in memory only - `model_aliases`: Map common model names (GPT/Codex/Claude) to DeepSeek models - `compat.wide_input_strict_output`: Keep `true` (current default policy) - `toolcall`: Fixed to feature matching + high-confidence early emit, no longer configurable - `responses.store_ttl_seconds`: In-memory TTL for `/v1/responses/{id}` - `embeddings.provider`: Embeddings provider (`deterministic/mock/builtin` built-in) - `claude_mapping`: Maps `fast`/`slow` suffixes to corresponding DeepSeek models (still compatible with `claude_model_mapping`) - `admin`: Admin panel settings (JWT expiry, password hash, etc.), hot-reloadable via Admin Settings API - `runtime`: Runtime parameters (concurrency limits, queue sizes, managed token refresh interval), hot-reloadable via Admin Settings API; `account_max_queue=0`/`global_max_inflight=0` means auto-calculate from recommended values, `token_refresh_interval_hours=6` is the default forced re-login interval - `auto_delete.sessions`: Whether to auto-delete DeepSeek sessions after request completion (default `false`, hot-reloadable via Settings) ### Environment Variables | Variable | Purpose | Default | | --- | --- | --- | | `PORT` | Service port | `5001` | | `LOG_LEVEL` | Log level | `INFO` (`DEBUG`/`WARN`/`ERROR`) | | `DS2API_ADMIN_KEY` | Admin login key | `admin` | | `DS2API_JWT_SECRET` | Admin JWT signing secret | Same as `DS2API_ADMIN_KEY` | | `DS2API_JWT_EXPIRE_HOURS` | Admin JWT TTL in hours | `24` | | `DS2API_CONFIG_PATH` | Config file path | `config.json` | | `DS2API_CONFIG_JSON` | Inline config (JSON or Base64) | — | | `CONFIG_JSON` | Legacy compatibility config input | — | | `DS2API_WASM_PATH` | PoW WASM file path | Auto-detect | | `DS2API_STATIC_ADMIN_DIR` | Admin static assets dir | `static/admin` | | `DS2API_AUTO_BUILD_WEBUI` | Auto-build WebUI on startup | Enabled locally, disabled on Vercel | | `DS2API_ACCOUNT_MAX_INFLIGHT` | Max in-flight requests per account | `2` | | `DS2API_ACCOUNT_CONCURRENCY` | Alias (legacy compat) | — | | `DS2API_ACCOUNT_MAX_QUEUE` | Waiting queue limit | `recommended_concurrency` | | `DS2API_ACCOUNT_QUEUE_SIZE` | Alias (legacy compat) | — | | `DS2API_GLOBAL_MAX_INFLIGHT` | Global max in-flight requests | `recommended_concurrency` | | `DS2API_MAX_INFLIGHT` | Alias (legacy compat) | — | | `DS2API_VERCEL_INTERNAL_SECRET` | Vercel hybrid streaming internal auth | Falls back to `DS2API_ADMIN_KEY` | | `DS2API_VERCEL_STREAM_LEASE_TTL_SECONDS` | Stream lease TTL seconds | `900` | | `DS2API_DEV_PACKET_CAPTURE` | Local dev packet capture switch (record recent request/response bodies) | Enabled by default on non-Vercel local runtime | | `DS2API_DEV_PACKET_CAPTURE_LIMIT` | Number of captured sessions to retain (auto-evict overflow) | `5` | | `DS2API_DEV_PACKET_CAPTURE_MAX_BODY_BYTES` | Max recorded bytes per captured response body | `2097152` | | `VERCEL_TOKEN` | Vercel sync token | — | | `VERCEL_PROJECT_ID` | Vercel project ID | — | | `VERCEL_TEAM_ID` | Vercel team ID | — | | `DS2API_VERCEL_PROTECTION_BYPASS` | Vercel deployment protection bypass for internal Node→Go calls | — | ## Authentication Modes For business endpoints (`/v1/*`, `/anthropic/*`, Gemini routes), DS2API supports two modes: | Mode | Description | | --- | --- | | **Managed account** | Use a key from `config.keys` via `Authorization: Bearer ...` or `x-api-key`; DS2API auto-selects an account | | **Direct token** | If the token is not in `config.keys`, DS2API treats it as a DeepSeek token directly | Optional header `X-Ds2-Target-Account`: Pin a specific managed account (value is email or mobile). Gemini routes also accept `x-goog-api-key`, or `?key=` / `?api_key=` when no auth header is present. ## Concurrency Model ``` Per-account inflight = DS2API_ACCOUNT_MAX_INFLIGHT (default 2) Recommended concurrency = account_count × per_account_inflight Queue limit = DS2API_ACCOUNT_MAX_QUEUE (default = recommended concurrency) 429 threshold = inflight + queue ≈ account_count × 4 ``` - When inflight slots are full, requests enter a waiting queue — **no immediate 429** - 429 is returned only when total load exceeds inflight + queue capacity - `GET /admin/queue/status` returns real-time concurrency state ## Tool Call Adaptation When `tools` is present in the request, DS2API performs anti-leak handling: 1. Toolcall feature matching is enabled only in **non-code-block context** (fenced examples are ignored) - In non-code-block context, tool JSON may still be recognized even when mixed with normal prose; surrounding prose can remain as text output. 2. `responses` streaming strictly uses official item lifecycle events (`response.output_item.*`, `response.content_part.*`, `response.function_call_arguments.*`) 3. Tool names not declared in the `tools` schema are strictly rejected and will not be emitted as valid tool calls 4. `responses` supports and enforces `tool_choice` (`auto`/`none`/`required`/forced function); `required` violations return `422` for non-stream and `response.failed` for stream 5. Valid tool call events are only emitted after passing policy validation, preventing invalid tool names from entering the client execution chain ## Local Dev Packet Capture This is for debugging issues such as Responses reasoning streaming and tool-call handoff. When enabled, DS2API stores the latest N DeepSeek conversation payload pairs (request body + upstream response body), defaulting to 5 entries with auto-eviction. Enable example: ```bash DS2API_DEV_PACKET_CAPTURE=true \ DS2API_DEV_PACKET_CAPTURE_LIMIT=5 \ go run ./cmd/ds2api ``` Inspect/clear (Admin JWT required): - `GET /admin/dev/captures`: list captured items (newest first) - `DELETE /admin/dev/captures`: clear captured items Response fields include: - `request_body`: full payload sent to DeepSeek - `response_body`: concatenated raw upstream stream body text - `response_truncated`: whether body-size truncation happened ## Project Structure ```text ds2api/ ├── cmd/ │ ├── ds2api/ # Local / container entrypoint │ └── ds2api-tests/ # End-to-end testsuite entrypoint ├── api/ │ ├── index.go # Vercel Serverless Go entry │ ├── chat-stream.js # Vercel Node.js stream relay │ └── (rewrite targets in vercel.json) ├── internal/ │ ├── account/ # Account pool and concurrency queue │ ├── adapter/ │ │ ├── openai/ # OpenAI adapter (incl. tool call parsing, Vercel stream prepare/release) │ │ ├── claude/ # Claude adapter │ │ └── gemini/ # Gemini adapter (generateContent / streamGenerateContent) │ ├── admin/ # Admin API handlers (incl. Settings hot-reload) │ ├── auth/ # Auth and JWT │ ├── claudeconv/ # Claude message format conversion │ ├── compat/ # Compatibility helpers │ ├── config/ # Config loading and hot-reload │ ├── deepseek/ # DeepSeek API client, PoW WASM │ ├── js/ # Node runtime stream/compat logic │ ├── devcapture/ # Dev packet capture module │ ├── format/ # Output formatting │ ├── prompt/ # Prompt construction │ ├── server/ # HTTP routing and middleware (chi router) │ ├── sse/ # SSE parsing utilities │ ├── stream/ # Unified stream consumption engine │ ├── util/ # Common utilities │ └── webui/ # WebUI static file serving and auto-build ├── webui/ # React WebUI source (Vite + Tailwind) │ └── src/ │ ├── app/ # Routing, auth, config state │ ├── features/ # Feature modules (account/settings/vercel/apiTester) │ ├── components/ # Shared UI pieces (login/landing, etc.) │ └── locales/ # Language packs (zh.json / en.json) ├── scripts/ │ └── build-webui.sh # Manual WebUI build script ├── tests/ │ ├── compat/ # Compatibility fixtures and expected outputs │ └── scripts/ # Unified test script entrypoints (unit/e2e) ├── static/admin/ # WebUI build output (not committed to Git) ├── .github/ │ ├── workflows/ # GitHub Actions (quality gates + release automation) │ ├── ISSUE_TEMPLATE/ # Issue templates │ └── PULL_REQUEST_TEMPLATE.md ├── config.example.json # Config file template ├── .env.example # Environment variable template ├── Dockerfile # Multi-stage build (WebUI + Go) ├── docker-compose.yml # Production Docker Compose ├── docker-compose.dev.yml # Development Docker Compose ├── vercel.json # Vercel routing and build config └── go.mod / go.sum # Go module dependencies ``` ## Documentation Index | Document | Description | | --- | --- | | [API.md](API.md) / [API.en.md](API.en.md) | API reference with request/response examples | | [DEPLOY.md](DEPLOY.md) / [DEPLOY.en.md](DEPLOY.en.md) | Deployment guide (local/Docker/Vercel/systemd) | | [CONTRIBUTING.md](CONTRIBUTING.md) / [CONTRIBUTING.en.md](CONTRIBUTING.en.md) | Contributing guide | | [TESTING.md](TESTING.md) | Testsuite guide | ## Testing ```bash # Unit tests (Go + Node) ./tests/scripts/run-unit-all.sh # One-command live end-to-end tests (real accounts, full request/response logs) ./tests/scripts/run-live.sh # Or with custom flags go run ./cmd/ds2api-tests \ --config config.json \ --admin-key admin \ --out artifacts/testsuite \ --timeout 120 \ --retries 2 ``` ```bash # Release-blocking gates ./tests/scripts/check-stage6-manual-smoke.sh ./tests/scripts/check-refactor-line-gate.sh ./tests/scripts/run-unit-all.sh npm ci --prefix webui && npm run build --prefix webui ``` ## Release Artifact Automation (GitHub Actions) Workflow: `.github/workflows/release-artifacts.yml` - **Trigger**: only on GitHub Release `published` (normal pushes do not trigger builds) - **Outputs**: multi-platform archives (`linux/amd64`, `linux/arm64`, `darwin/amd64`, `darwin/arm64`, `windows/amd64`) + `sha256sums.txt` - **Container publishing**: GHCR only (`ghcr.io/cjackhwang/ds2api`) - **Each archive includes**: `ds2api` executable, `static/admin`, WASM file (with embedded fallback support), config template, README, LICENSE ## Disclaimer This project is built through reverse engineering and is provided for learning, research, personal experimentation, and internal validation only. No commercial authorization is granted, and no warranty of stability, fitness, or results is provided. The author and repository maintainers are not responsible for any direct or indirect loss, account suspension, data loss, legal risk, or third-party claims arising from use, modification, distribution, deployment, or reliance on this project. Do not use this project in ways that violate service terms, agreements, laws, or platform rules. Before any commercial use, review the `LICENSE`, the relevant terms, and confirm that you have the author's written permission.