Introduction

Welcome to the Nexus API documentation. Nexus provides a unified, professional interface for the world's most powerful AI models, streamlining access to text generation and image creation through a single integration.

Base URL

Key Features

Obtaining an API Key

To start building with Nexus, you'll need a unique API key. Follow these steps to generate yours.

1. Start Building

Navigate to nexusify.co and click on the "Start building" button.

2. Authentication

You will be redirected to the authentication portal (auth.nexusify.co). Complete one of the following:

• Complete the "I'm not a robot" verification.
• Or sign in using Google or Discord.

3. Access Dashboard

Upon successful login, you will be automatically redirected to the developer dashboard at:

4. Retrieve Credentials

Scroll down to the "API Credentials" section. Your API Key will be obscured for security.

Click the "Copy Secret Key" button located below the blurred field to copy your active key.

Authentication

All API requests require an API Key to be included in the header for security and tracking.

Headers

Include the Authorization header with your API key.

Authorization: Bearer YOUR_API_KEY

Chat Completions

Generate text using over 40 distinct AI models through a single, OpenAI-compatible endpoint.

Parameters

Example Request

curl -X POST https://api.nexusify.co/v1/chat/completions \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-2.5-flash",
    "messages": [
      {"role": "user", "content": "Explain relativity to a 5 year old."}
    ]
  }'

Available Text Models

A complete list of the 42 models currently supported by the Nexus API.

Image Generation

Create stunning visuals from text prompts using state-of-the-art diffusion models.

Parameters

Example

const res = await fetch('https://api.nexusify.co/v1/generate-image', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    prompt: "Cyberpunk city with neon rain, cinematic lighting",
    model: "flux-pro",
    width: 1024,
    height: 1024
  })
});

const data = await res.json();
console.log(data.imageUrl);

Image Models

Select the perfect model for your artistic requirements.

Limits & Errors

Understanding the operational limits and error responses of the API.

Usage Limits

Error Codes