Introduction

Welcome to the NeXeonAI API documentation. Our platform provides a unified, high-performance interface for accessing the world's most advanced Large Language Models (LLMs).

Designed for developers, the API is fully compatible with the OpenAI SDK specification, meaning you can integrate it into existing applications with just a few lines of code configuration.

Authentication

The API uses API keys for authentication. You can create and manage your API keys in the Dashboard.

Authentication is performed via the HTTP Authorization header. Provide your API key as a Bearer token.

curl https://api.nexeonai.com/v1/models \
  -H "Authorization: Bearer nex-sk-..."

List Models

Lists the currently available models, providing basic information such as the owner and availability status.

{
  "object": "list",
  "data": [
    {
      "id": "gpt-4o",
      "object": "model",
      "created": 1686935002,
      "owned_by": "openai"
    },
    {
      "id": "claude-3-5-sonnet",
      "object": "model",
      "created": 1718841600,
      "owned_by": "anthropic"
    }
  ]
}

Chat Completions

Creates a model response for the given chat conversation. This is the primary endpoint for interacting with LLMs.

Request Body

Example

curl https://api.nexeonai.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "model": "gpt-4o",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Hello!"}
    ]
  }'

Embeddings

Get a vector representation of a given input that can be easily consumed by machine learning models and algorithms.

curl https://api.nexeonai.com/v1/embeddings \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "input": "The food was delicious and the waiter...",
    "model": "text-embedding-3-small"
  }'

Image Generation

Creates an image given a prompt.

curl https://api.nexeonai.com/v1/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "prompt": "A futuristic city at sunset",
    "n": 1,
    "size": "1024x1024"
  }'

Streaming

NeXeonAI supports streaming responses for Chat Completions. When stream is set to true, the API will send server-sent events (SSE) containing partial message deltas.

Errors

The API uses standard HTTP response codes to indicate the success or failure of an API request.