deepseek-api

An OpenAI-compatible DeepSeek API proxy server implemented with Node.js 20+.

Features

• ✅ Fully compatible with OpenAI API format
• ✅ Supports streaming responses (SSE)
• ✅ Supports DeepSeek R1 reasoning chain (reasoning_content)
• ✅ Supports online search mode
• ✅ Optional account pool rotation
• ✅ Local PoW computation (WASM)
• ✅ Zero production dependencies

Supported Models

| Model ID | Reasoning Chain | Online Search | |---------|-----------------|---------------| | deepseek-chat | ❌ | ❌ | | deepseek-reasoner | ✅ | ❌ | | deepseek-chat-search | ❌ | ✅ | | deepseek-reasoner-search | ✅ | ✅ |

Aliases: deepseek-v3 → deepseek-chat, deepseek-r1 → deepseek-reasoner

Quick Start

Install dependencies

pnpm install

Configure environment variables

cp .env.template .env
# Edit the .env file

Development mode

pnpm dev

Production build

pnpm build
pnpm start

Environment Variables

| Variable | Description | Default | |----------|-------------|---------| | LISTEN_HOST | Listening address | 127.0.0.1 | | LISTEN_PORT | Listening port | 5001 | | GATEWAY_KEYS | Gateway keys (comma-separated), required when using account pool mode | - | | ACCOUNTS_JSON | Account pool JSON array | [] |

API Endpoints

GET /v1/models

List available models.

POST /v1/chat/completions

Create a chat completion.

Request example:

curl http://127.0.0.1:5001/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_DEEPSEEK_TOKEN" \
  -d '{
    "model": "deepseek-chat",
    "messages": [{"role": "user", "content": "Hello!"}],
    "stream": true
  }'

Authentication

Method 1: Use DeepSeek Token directly

Pass DeepSeek's Bearer Token directly in the Authorization header.

You can obtain the token from DeepSeek web app's local storage under the key userToken.

Method 2: Gateway key + account pool

1. Configure GATEWAY_KEYS and ACCOUNTS_JSON
2. Use a gateway key as the Authorization header
3. The server will automatically choose an account from the pool and log in

ACCOUNTS_JSON format:

[
  {"email": "[email protected]", "password": "xxx"},
  {"mobile": "13800138000", "password": "xxx"}
]

Project Structure

src/
├── index.ts          # Main entry - HTTP server
├── types.ts          # Type definitions
├── constants.ts      # Constants and env config
├── utils.ts          # Utility functions
├── pow.ts            # PoW WASM computation
├── account.ts        # Account pool management
├── stream-parser.ts  # DeepSeek stream response parser
├── deepseek.ts       # DeepSeek API calls
└── routes.ts         # Route handlers
public/
└── sha3_wasm_bg.*.wasm  # PoW computation WASM file