🔌 OpenAI Compatible API - Multi-Model AI API Gateway

English | 中文

A unified OpenAI-compatible API gateway that provides access to GPT-4, Claude, Gemini, and more. Use your favorite OpenAI SDK to access all top AI models at a fraction of the cost.

---

✨ Why Use This?

• 🔄 One API, All Models – Access GPT-4, Claude, Gemini with a single API key
• 💰 Save Money – Much cheaper than using each provider directly
• 🔌 Drop-in Replacement – Works with existing OpenAI SDK code, zero changes needed
• 🌐 Multi-Protocol – OpenAI, Anthropic (Claude), Google Gemini native protocols
• ⚡ Fast & Reliable – Optimized infrastructure with high availability
• 🛡️ No Rate Limits – Enterprise-grade capacity

🚀 Quick Start

Get Your API Key

1. Visit Mountsea AI Platform
2. Sign up and get your API key
3. Replace base_url in your code – done!

Install SDK

# Python
pip install mountsea-openai

# Node.js
npm install mountsea-openai

SDK Quick Start

from mountsea_openai import ChatClient

client = ChatClient("your-api-key")
print(client.chat("Hello!", model="gpt-4"))
print(client.chat("Tell me a joke", model="claude-3-opus"))
print(client.chat("What is AI?", model="gemini-pro"))

const { ChatClient } = require('mountsea-openai');
const client = new ChatClient('your-api-key');
console.log(await client.chat('Hello!', 'gpt-4'));

Python (OpenAI SDK)

from openai import OpenAI

# Just change api_key and base_url, everything else stays the same!
client = OpenAI(
    api_key="your-mountsea-api-key",
    base_url="https://api.mountsea.ai/v1"
)

# Use GPT-4
response = client.chat.completions.create(
    model="gpt-4",
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Explain quantum computing in simple terms."}
    ],
    temperature=0.7,
    max_tokens=1000
)

print(response.choices[0].message.content)

Use Claude via OpenAI SDK

# Access Claude through the same OpenAI-compatible interface
response = client.chat.completions.create(
    model="claude-3-opus",
    messages=[
        {"role": "user", "content": "Write a haiku about programming."}
    ]
)

print(response.choices[0].message.content)

Use Gemini via OpenAI SDK

# Access Gemini through the same interface
response = client.chat.completions.create(
    model="gemini-pro",
    messages=[
        {"role": "user", "content": "What are the latest trends in AI?"}
    ]
)

print(response.choices[0].message.content)

Streaming

# Streaming responses
stream = client.chat.completions.create(
    model="gpt-4",
    messages=[{"role": "user", "content": "Tell me a story about a robot."}],
    stream=True
)

for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="")

Node.js (OpenAI SDK)

import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: process.env.MOUNTSEA_API_KEY || 'your-api-key',
  baseURL: 'https://api.mountsea.ai/v1'
});

// GPT-4
const response = await client.chat.completions.create({
  model: 'gpt-4',
  messages: [
    { role: 'system', content: 'You are a helpful assistant.' },
    { role: 'user', content: 'Hello!' }
  ]
});

console.log(response.choices[0].message.content);

// Streaming
const stream = await client.chat.completions.create({
  model: 'gpt-4',
  messages: [{ role: 'user', content: 'Tell me a joke' }],
  stream: true
});

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content || '');
}

Anthropic SDK (Native Claude Protocol)

from anthropic import Anthropic

client = Anthropic(
    api_key="your-mountsea-api-key",
    base_url="https://api.mountsea.ai"
)

message = client.messages.create(
    model="claude-3-opus-20240229",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello, Claude!"}
    ]
)

print(message.content[0].text)

cURL

# OpenAI-compatible endpoint
curl -X POST https://api.mountsea.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ],
    "temperature": 0.7
  }'

📖 Supported Models

OpenAI Models

Model	Description
gpt-4	Most capable GPT model
gpt-4-turbo	Faster GPT-4 variant
gpt-3.5-turbo	Fast and affordable

Anthropic Models

Model	Description
claude-3-opus	Most capable Claude model
claude-3-sonnet	Balanced performance
claude-3-haiku	Fast and efficient

Google Models

Model	Description
gemini-pro	Versatile Gemini model
gemini-pro-vision	Multimodal capabilities
gemini-ultra	Most powerful Gemini

🔌 Compatible Applications

Works seamlessly with:

• ✅ OpenAI Python SDK – Drop-in replacement
• ✅ OpenAI Node.js SDK – Drop-in replacement
• ✅ Anthropic SDK – Native support
• ✅ Cherry Studio – Full compatibility
• ✅ Cursor – AI-powered code editor
• ✅ Claude Code – Anthropic's coding tool
• ✅ LangChain – AI framework
• ✅ LlamaIndex – Data framework
• ✅ AutoGPT – Autonomous agents
• ✅ Any OpenAI-compatible application

🔧 Configuration for Popular Tools

Cursor

{
  "openai.apiKey": "your-mountsea-api-key",
  "openai.baseUrl": "https://api.mountsea.ai/v1"
}

Cherry Studio

API Base URL: https://api.mountsea.ai/v1
API Key: your-mountsea-api-key

LangChain

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="gpt-4",
    openai_api_key="your-mountsea-api-key",
    openai_api_base="https://api.mountsea.ai/v1"
)

response = llm.invoke("Hello!")
print(response.content)

💰 Pricing

Package	Credits	Price
Starter	10,000	¥100
Basic	50,000	¥500
Pro	200,000	¥2,000
Business	500,000	¥4,500 (10% OFF)
Enterprise	1,000,000	¥8,000 (20% OFF)

👉 View Full Pricing

📚 Documentation

• 📘 Chat API Documentation
• 📘 Gemini API Documentation
• 🏠 Mountsea AI Platform

🔗 Related Projects

• Suno API - AI Music Generation API
• Sora API - AI Video Generation API
• Veo API - Google Veo Video Generation API
• Gemini API - Google Gemini API
• Awesome AI API - Curated list of AI APIs

---

🇨🇳 中文文档

🔌 OpenAI 兼容 API - 多模型 AI API 网关

统一的 OpenAI 兼容 API 网关，提供 GPT-4、Claude、Gemini 等模型访问。使用你熟悉的 OpenAI SDK 以极低价格访问所有顶级 AI 模型。

✨ 为什么选择我们？

• 🔄 一个 API，所有模型 – 用一个 API 密钥访问 GPT-4、Claude、Gemini
• 💰 省钱 – 比直接使用各提供商便宜很多
• 🔌 即插即用 – 兼容现有 OpenAI SDK 代码，无需修改
• 🌐 多协议 – 支持 OpenAI、Anthropic（Claude）、Google Gemini 原生协议
• ⚡ 快速可靠 – 优化的基础设施，高可用性

🚀 快速开始

获取 API 密钥

1. 访问 Mountsea AI 平台
2. 注册账号并获取 API 密钥
3. 替换代码中的 base_url – 搞定！

Python 示例

from openai import OpenAI

# 只需更改 api_key 和 base_url，其他代码完全不变！
client = OpenAI(
    api_key="your-mountsea-api-key",
    base_url="https://api.mountsea.ai/v1"
)

# 使用 GPT-4
response = client.chat.completions.create(
    model="gpt-4",
    messages=[
        {"role": "system", "content": "你是一个有用的助手。"},
        {"role": "user", "content": "用简单的话解释量子计算。"}
    ]
)

print(response.choices[0].message.content)

支持的客户端

• ✅ OpenAI Python/Node.js SDK
• ✅ Anthropic SDK
• ✅ Cherry Studio
• ✅ Cursor
• ✅ Claude Code
• ✅ LangChain
• ✅ 任何 OpenAI 兼容应用

📚 文档

• 📘 Chat API 完整文档
• 📘 Gemini API 完整文档
• 🏠 Mountsea AI 官网

⭐ Star History

如果这个项目对你有帮助，请给我们一个 Star ⭐

📄 License

MIT License

---

Powered by Mountsea AI – 全球顶级 AI API 一体化平台

Last API Check: 2026-03-06 | Status: online