API Documentation

80% cheaper AI API with OpenAI-compatible endpoints. Premium models at a fraction of the cost.

⚡ Connect Any App in 3 Steps

Works with any app that supports OpenAI or OpenAI Compatible connection. Just 3 simple changes:

https://freeaiapikey.com/v1

Example: Python (OpenAI SDK)

from openai import OpenAI

client = OpenAI(
    base_url="https://freeaiapikey.com/v1",  # ← Change this
    api_key="your-api-key-here"               # ← Your API key
)

response = client.chat.completions.create(
    model="gpt-5",  # ← Any model from /models
    messages=[{"role": "user", "content": "Hello!"}]
)

Example: cURL

curl https://freeaiapikey.com/v1/chat/completions \
  -H "Authorization: Bearer your-api-key-here" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5", "messages": [{"role": "user", "content": "Hello!"}]}'

🔧 Advanced Configuration

Detailed API reference and tool-specific integration guides below.

🚀 Quick Start

Our API is 100% OpenAI-compatible. Just change the base URL and you're ready.

Three Things You Need

30-Second Setup

# Install: pip install openai
from openai import OpenAI

client = OpenAI(
    api_key="your-api-key-here",
    base_url="https://freeaiapikey.com/v1"
)

response = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Hello!"}]
)

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

🔑 Authentication

Get Your API Key

1. Visit freeaiapikey.com/dashboard
2. Sign up or log in
3. Copy your API key from the dashboard

Using Your API Key

Include your API key in the Authorization header as a Bearer token:

curl https://freeaiapikey.com/v1/chat/completions \
  -H "Authorization: Bearer your-api-key-here" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5", "messages": [{"role": "user", "content": "Hello!"}]}'

🌐 Base URL

All API requests should be made to:

https://freeaiapikey.com/v1

Endpoints

📋 Available Models

Browse all models at freeaiapikey.com/models

Model Catalog

Model Aliases

Use short names for convenience:

List Models via API

curl https://freeaiapikey.com/v1/models \
  -H "Authorization: Bearer your-api-key-here"

📖 Chat Completions

Request Body

{
  "model": "gpt-5",
  "messages": [
    {"role": "system", "content": "You are a helpful assistant."},
    {"role": "user", "content": "Hello!"}
  ],
  "temperature": 0.7,
  "max_tokens": 4096,
  "stream": false
}

Parameters

Response

{
  "id": "chatcmpl-xxx",
  "object": "chat.completion",
  "created": 1234567890,
  "model": "gpt-5",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you today?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 10,
    "completion_tokens": 20,
    "total_tokens": 30
  }
}

⚡ Streaming Responses

Enable streaming by setting stream: true:

response = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Write a poem"}],
    stream=True
)

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

🔌 Integrations

Our API works with any tool that supports OpenAI-compatible endpoints.

💻 Code Examples

Python (OpenAI SDK)

from openai import OpenAI

client = OpenAI(
    api_key="your-api-key-here",
    base_url="https://freeaiapikey.com/v1"
)

# Basic completion
response = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

# Streaming
for chunk in client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Write a story"}],
    stream=True
):
    print(chunk.choices[0].delta.content or "", end="")

JavaScript/TypeScript

import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: 'your-api-key-here',
  baseURL: 'https://freeaiapikey.com/v1',
});

const response = await client.chat.completions.create({
  model: 'gpt-5',
  messages: [{ role: 'user', content: 'Hello!' }],
});

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

cURL

curl https://freeaiapikey.com/v1/chat/completions \
  -H "Authorization: Bearer your-api-key-here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

LangChain (Python)

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="gpt-5",
    openai_api_key="your-api-key-here",
    openai_api_base="https://freeaiapikey.com/v1"
)

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

💰 Pricing

Pay as you go - no monthly fees, no minimum spend.

Compare and Save

❓ FAQ

General Questions

Q: Is this API really OpenAI-compatible?

Yes! Our API uses the exact same request/response format as OpenAI. Any code or tool that works with OpenAI will work with FreeAIAPIKey.

Q: How are you able to offer 80% cheaper prices?

We use bulk purchasing, smart caching, community donations, and efficient infrastructure to keep costs low.

Q: Is there a rate limit?

No, we don't impose rate limits on our users.

Q: Do you store my data?

No long-term storage. We use temporary caching (minutes) for efficiency, then data is deleted.

Which tool should I use?

• Claude Code - Best for terminal-based coding
• Roo Code / Kilo Code - Best for VSCode users
• Codex CLI - Best for OpenAI ecosystem
• Droid CLI - Best for Factory AI users
• OpenClaw - Best for multi-channel AI agents
• n8n - Best for workflow automation

Which model should I use?

• gpt-5 - General purpose, best overall
• claude-opus-4.5 - Complex reasoning, coding
• claude-sonnet-4.5 - Fast, cost-efficient
• gemini-3 - Long context, multimodal
• deepseek-v3.2 - Code generation

🆘 Support