DS2API

Language: 中文 | English

DS2API converts DeepSeek Web chat capability into OpenAI-compatible and Claude-compatible APIs. The current repository is Go backend only with the existing React WebUI kept as static assets under static/admin.

Implementation Boundary

• Backend: Go (cmd/, api/, internal/), no Python runtime
• Frontend: React admin panel (webui/ source, static build served at runtime)
• Deployment: local run, Docker, Vercel serverless

Key Capabilities

• OpenAI-compatible endpoints: GET /v1/models, POST /v1/chat/completions
• Claude-compatible endpoints: GET /anthropic/v1/models, POST /anthropic/v1/messages, POST /anthropic/v1/messages/count_tokens
• Multi-account rotation and automatic token refresh
• DeepSeek PoW solving via WASM
• Admin API: config management, account tests, import/export, Vercel sync
• WebUI SPA hosting at /admin
• Health probes: GET /healthz, GET /readyz

Model Support

OpenAI endpoint

Model	thinking	search
deepseek-chat	false	false
deepseek-reasoner	true	false
deepseek-chat-search	false	true
deepseek-reasoner-search	true	true

Claude endpoint

Model	Default mapping
claude-sonnet-4-20250514	deepseek-chat
claude-sonnet-4-20250514-fast	deepseek-chat
claude-sonnet-4-20250514-slow	deepseek-reasoner

You can override mapping via claude_mapping or claude_model_mapping in config.

Quick Start

1) Local run

Requirement: Go 1.25+

git clone https://github.com/CJackHwang/ds2api.git
cd ds2api

cp config.example.json config.json
# edit config.json

go run ./cmd/ds2api

Default URL: http://localhost:5001

If /admin says WebUI not built:

./scripts/build-webui.sh

2) Docker

cp .env.example .env
# edit .env

docker-compose up -d
docker-compose logs -f

3) Vercel

• Entrypoint: api/index.go
• Rewrites: vercel.json
• Minimum env vars:
• DS2API_ADMIN_KEY
• DS2API_CONFIG_JSON (raw JSON or Base64)

Configuration

config.json example

{
  "keys": ["your-api-key-1", "your-api-key-2"],
  "accounts": [
    {
      "email": "user@example.com",
      "password": "your-password",
      "token": ""
    },
    {
      "mobile": "12345678901",
      "password": "your-password",
      "token": ""
    }
  ],
  "claude_model_mapping": {
    "fast": "deepseek-chat",
    "slow": "deepseek-reasoner"
  }
}

Core environment variables

Variable	Purpose
PORT	Service port, default 5001
LOG_LEVEL	DEBUG/INFO/WARN/ERROR
DS2API_ADMIN_KEY	Admin login key, default admin
DS2API_JWT_SECRET	Admin JWT signing secret (optional)
DS2API_JWT_EXPIRE_HOURS	Admin JWT TTL in hours, default 24
DS2API_CONFIG_PATH	Config file path, default config.json
DS2API_CONFIG_JSON	Inline config (JSON or Base64)
DS2API_WASM_PATH	PoW wasm path
DS2API_STATIC_ADMIN_DIR	Admin static assets dir
VERCEL_TOKEN	Vercel sync token (optional)
VERCEL_PROJECT_ID	Vercel project ID (optional)
VERCEL_TEAM_ID	Vercel team ID (optional)

Auth and Account Modes

For business endpoints (/v1/*, /anthropic/*), DS2API supports two modes:

1. Managed account mode: use a key from config.keys via Authorization: Bearer ... or x-api-key.
2. Direct token mode: if the incoming token is not in config.keys, DS2API treats it as a DeepSeek token directly.

Optional header: X-Ds2-Target-Account to pin one managed account.

Tool Call Adaptation

Tool-call leakage is handled in the current implementation:

• With tools + stream=true, DS2API buffers text deltas first
• If a tool call is detected, DS2API returns structured tool_calls only
• If no tool call is detected, DS2API emits the buffered text once
• Parser supports mixed text, fenced JSON, and function.arguments payloads

Docs and Testing

• API docs: API.md / API.en.md
• Deployment docs: DEPLOY.md / DEPLOY.en.md
• Contributing: CONTRIBUTING.md / CONTRIBUTING.en.md

go test ./...

Disclaimer

This project is built through reverse engineering and is provided for learning and research only. Stability is not guaranteed. Do not use it in scenarios that violate terms of service or laws.