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Documentation Index

Fetch the complete documentation index at: https://apidoc.cometapi.com/llms.txt

Use this file to discover all available pages before exploring further.

Use the OpenAI SDK with CometAPI by changing two client settings: the API key and the base URL. Keep your existing OpenAI-compatible request code, then replace the model ID with an available CometAPI model ID.

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Install the SDK

The following command installs the OpenAI Python SDK: 
pip install openai
The following command installs the OpenAI Node.js SDK: 
npm install openai

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Python client

The following Python example creates a CometAPI client and sends a chat request: 
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["COMETAPI_KEY"],
    base_url="https://api.cometapi.com/v1",
)

completion = client.chat.completions.create(
    model="your-model-id",
    messages=[
        {
            "role": "user",
            "content": "Answer in one short sentence: What is CometAPI?",
        }
    ],
)

print(completion.choices[0].message.content)
The response object contains the assistant message: 
{
  "choices": [
    {
      "message": {
        "role": "assistant",
        "content": "CometAPI provides API access to models from multiple providers."
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 16,
    "completion_tokens": 12,
    "total_tokens": 28
  }
}

​
Node.js client

The following Node.js example uses baseURL with the OpenAI SDK: 
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.COMETAPI_KEY,
  baseURL: "https://api.cometapi.com/v1",
});

const completion = await client.chat.completions.create({
  model: "your-model-id",
  messages: [
    {
      role: "user",
      content: "Answer in one short sentence: What is CometAPI?",
    },
  ],
});

console.log(completion.choices[0].message.content);
The response shape is the same OpenAI-compatible chat completion shape: 
{
  "id": "chatcmpl_example",
  "object": "chat.completion",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "CometAPI provides API access to models from multiple providers."
      }
    }
  ]
}

​
Common errors

ErrorFix
401Confirm that COMETAPI_KEY is set and that the request uses Bearer auth.
SDK still calls OpenAISet base_url in Python or baseURL in Node.js.
Invalid model IDChoose a model ID from the Models page.
Missing /v1Use https://api.cometapi.com/v1 for OpenAI-compatible SDKs.
Last updated: May 27, 2026