Opus 5 and Gemini Omni Flash models have been added.
ChatQT
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Developer API

The power of ChatQT, in developers' hands.

Dozens of AI models from one endpoint — compatible with the OpenAI SDK, transparent usage. API key, docs, usage stats and wallet top-up in the developer console. For the terminal: Claude CLI guide; for automation: n8n guide.

Log in to console Quick start
Python 
from openai import OpenAI

client = OpenAI(
 base_url="https://api.chatqt.com/api/v1",
 api_key="<CHATQT_API_KEY>",
)

completion = client.chat.completions.create(
 model="openai/gpt-4.1",
 messages=[
 {"role": "user", "content": "What is the meaning of life?"}],
)

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

developer console

Everything in one dashboard.

In the console.chatqt.com you create an API key, choose a model, read the docs, monitor usage and top up your wallet — with instant activation.

API keys

Separate keys for development and production; secure (masked) display and management from one table.

Models

A list of ChatGPT, Claude, Gemini, Grok and dozens of other models, each with a unique ID for API requests.

Interactive docs

Quick start, Streaming, Tool Calls, multimodal, parameters and error handling — the same content as the console.

Usage statistics

Request count, cost, models used, a weekly chart and a detailed history of every call.

Wallet

Dollar balance, online top-up via the bank gateway, and billing based on actual usage.

Quick start

Getting started with ChatQT

ChatQT is a unified API for accessing dozens of AI models from one endpoint. With a few lines of code and an API key from the console, you can use any framework or SDK you like.

  1. 1

    Sign up in the console

    Create an account and top up your wallet.

  2. 2

    Create an API key

    Create a new key from the 'API keys' section.

  3. 3

    Your first request

    Test with the OpenAI SDK or REST.

Using the OpenAI SDK

Compatible with the official OpenAI library — just change base_url and api_key :

Python 
pip install openai

from openai import OpenAI

client = OpenAI(
 base_url="https://api.chatqt.com/api/v1",
 api_key="YOUR_CHATQT_API_KEY",
)

completion = client.chat.completions.create(
 model="openai/gpt-4.1",
 messages=[
 {"role": "user", "content": "What is the meaning of life?"}],
)

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

Using the API directly

In any language via HTTP — example with Python and requests:

Python 
import requests

url = "https://api.chatqt.com/api/v1/chat/completions"
headers = {
 "Authorization": "Bearer YOUR_CHATQT_API_KEY",
 "Content-Type": "application/json",
}
payload = {
 "model": "openai/gpt-4.1",
 "messages": [{"role": "user", "content": "Hello!"}],
}

response = requests.post(url, headers=headers, json=payload)
response.raise_for_status()
print(response.json()["choices"][0]["message"]["content"])

Authentication

Base URL and API key

Base URLhttps://api.chatqt.com/api/v1
HeaderAuthorization: Bearer YOUR_CHATQT_API_KEY
FormatJSON · compatible with OpenAI Chat Completions

Keys with the prefix sk-or-v1- are shown in the console. Never commit a key to a public repository; use an environment variable.

Features

One API, dozens of models.

From conversation and streaming to image, video, audio and Tool Calls — all from one gateway. Details of each endpoint in console → Docs.

chat/completions

Conversation

Multi-step Chat Completions, message history, and support for system / user / assistant.

Streaming

Token-by-token responses with stream: true — ideal for chat interfaces.

Tool Calls

Call functions and external tools with a standard interface across models.

Multimodal

Image, audio and file input in messages — depending on the selected model.

Parameters

temperature, max_tokens, top_p and other model settings in the request body.

Embeddings and more

Text embedding, TTS, STT and image/video generation for supported models.

Streaming

Streaming responses

To display the response progressively in the UI, enable the stream parameter. The official OpenAI SDK supports streaming.

Python 
stream = client.chat.completions.create(
 model="openai/gpt-4.1",
 messages=[{"role": "user", "content": "Write a short story"}],
 stream=True,
)

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

Tool Calls

Tool and function calling

Tool Calling lets the model suggest external tools. The model doesn't run the tool itself — you call the function and return the result to the conversation. ChatQT provides a uniform interface for all supported models.

Step 1: request with tools
Step 2: run the tool
Step 3: send the result
JSON 
{
 "model": "openai/gpt-4o-mini",
 "messages": [
 {"role": "user", "content": "What are the titles of some books by James Joyce?"}
 ],
 "tools": [
 {
 "type": "function",
 "function": {
 "name": "search_books",
 "description": "Search books by author",
 "parameters": {
 "type": "object",
 "properties": {
 "author": {"type": "string"}
 }
 }
 }
 }
 ]
}

Models

Model ID

In the field model use the unique ID from the console — usually in the form provider/model-name (e.g., openai/gpt-4.1, anthropic/claude-sonnet-4.6). The full list is in console → Models and in the price table.

Note: A model's display name (e.g., «Claude Opus 4.7») is not the same as its API ID — always copy it from the console.

Stats and reports

Usage statistics

In the console, the 'Usage stats' section includes summary cards, a weekly usage chart and a request-history table (date, model, context tokens, cost).

Total requests

—

Total cost

$—

Models used

—

Average cost

$—

Billing

Wallet and top-up

The API is based on pay-as-you-go. You can see your wallet balance in the console and top up via the bank gateway (pay as you go). No mandatory subscription — you only pay for what you use.

  • •The balance is shown in dollars; checkout uses your selected payment method.
  • •When credit runs out, API requests pause until you top up again.
  • •Details of each model's rates are on the developer console.

Error handling

Common errors

401 Unauthorized

Invalid or expired API key. Create a new key from the console and check the Authorization header.

402 / Insufficient balance

Insufficient wallet balance — top up from the Wallet section.

404 Model not found

The model ID is wrong. Copy it exactly from the console's model list.

429 Rate limit

Too many requests — exponential backoff and delayed retry are recommended.

FAQ

Common developer questions

Is it compatible with the official OpenAI SDK?
Yes. Just set base_url to https://api.chatqt.com/api/v1 and api_key to your ChatQT key.
What's the difference between api.chatqt.com/api and /api/v1?
For the OpenAI SDK and n8n, use /api/v1. Some clients (such as Claude CLI) use /api without v1 — Claude CLI guide and n8n guide.
Where are the full docs?
The interactive, up-to-date version is in console → Docs. This page is an overview and quick start.
How long does key activation take?
After you create a key in the console, you can send the first request immediately.

Ready to build with the API?

Get an API key, send your first request and track usage in the console.

Log in to console Claude CLI n8n Pricing