What is Nexus API

Oct 24, 2025

Nexus API is a unified LLM API gateway that provides access to a wide range of AI models through a single, OpenAI-compatible API endpoint. Access models like GPT-5, Claude, DeepSeek, Gemini, and more — all with one API key.

Why Nexus API?

  • One API, Many Models: Access 100+ AI models from different providers through a single API endpoint
  • OpenAI-Compatible: Use the standard OpenAI SDK format — just change the base URL and API key
  • Pay-as-you-go: No subscriptions required, pay only for the tokens you use (billed in USD)
  • 24/7 Support: Customer service available around the clock with 5-minute response time

Quick Start

1. Get Your API Key

Register at nexusapi.one and get your API key from the Console.

2. Set Up

export OPENAI_API_KEY="sk-xxx"
export OPENAI_BASE_URL="https://nexusapi.one/v1"

3. Make Your First API Call

from openai import OpenAI

client = OpenAI(
    api_key="sk-xxx",
    base_url="https://nexusapi.one/v1"
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello!"}]
)

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

Supported Tools

Nexus API works with popular AI coding tools:

ToolDescription
Claude CodeAnthropic's CLI for Claude
OpenAI CodexOpenAI's coding agent
RooCodeVS Code AI extension
KiloCodeVS Code AI extension
Qwen CodeAlibaba's coding CLI

Payment Methods

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