CometAPI Python SDK

Stable release line: 0.1.x maintenance releases are available from PyPI.

cometapi is a thin Python adapter over the official OpenAI SDK for the OpenAI-compatible CometAPI endpoint. It changes the default API key and base URL configuration while preserving official OpenAI request, response, stream, error, retry, timeout, proxy, and transport behavior.

Supported 0.1 surface

Operation	Synchronous	Asynchronous	Streaming
chat.completions.create	Yes	Yes	Yes
responses.create	Yes	Yes	Yes
models.list	Yes	Yes	Not applicable

Only these operations are supported and contract-tested for 0.1. Other resources inherited from the OpenAI client are not CometAPI support claims. See COMPATIBILITY.md for the precise compatibility policy.

The package requires Python 3.10 or later and declares openai>=2.45.0,<3.0.0.

Project links: CometAPI, API documentation, source repository, and issue tracker.

Installation

Install the latest stable release from PyPI with:

python -m pip install cometapi

See the CometAPI package on PyPI for the current stable distribution and release history.

Authentication and configuration

Create an API key at https://www.cometapi.com/console/token and provide it through the environment:

export COMETAPI_KEY="your-api-key"

You are responsible for all usage and charges incurred with your key. Never commit a key, place one in an example, or include one in a bug report.

Configuration precedence is explicit constructor value, then environment variable, then the default:

Constructor option	Environment variable	Default
api_key	COMETAPI_KEY	Required
base_url	COMETAPI_BASE_URL	https://api.cometapi.com/v1

Leading and trailing whitespace is removed from string API keys and base URLs. An explicitly blank string is invalid and never falls back to the environment or default. A blank COMETAPI_KEY is treated as missing, while a blank COMETAPI_BASE_URL uses the default CometAPI URL. Callable API keys and httpx.URL values retain their official OpenAI behavior.

Usage

Chat Completions

from cometapi import CometAPI

with CometAPI() as client:
    response = client.chat.completions.create(
        model="gpt-5.6-sol",
        messages=[{"role": "user", "content": "Hello!"}],
    )
    print(response.choices[0].message.content)

Streaming uses the official OpenAI stream type:

from cometapi import CometAPI

with CometAPI() as client:
    stream = client.chat.completions.create(
        model="gpt-5.6-sol",
        messages=[{"role": "user", "content": "Write one sentence."}],
        stream=True,
    )
    for chunk in stream:
        print(chunk.choices[0].delta.content or "", end="")

Responses and Models

from cometapi import CometAPI

with CometAPI() as client:
    response = client.responses.create(
        model="gpt-5.6-sol",
        input="Explain API compatibility in one sentence.",
    )
    models = client.models.list()

print(response.output_text)
print(models.data[0].id if models.data else "No models returned")

Async client

import asyncio

from cometapi import AsyncCometAPI


async def main() -> None:
    async with AsyncCometAPI() as client:
        response = await client.responses.create(
            model="gpt-5.6-sol",
            input="Say hello.",
        )
        print(response.output_text)


asyncio.run(main())

The constructor exposes a named, typed option set: api_key, admin_api_key, organization, project, webhook_secret, base_url, websocket_base_url, timeout, max_retries, default_headers, default_query, and the sync or async http_client. Configure proxies through that documented custom HTTP client path. OpenAI provider routing and workload identity are deliberately excluded because they replace CometAPI routing or authentication; private underscore-prefixed OpenAI controls and arbitrary keywords are rejected. Inherited copy and with_options helpers are not part of the supported 0.1 surface and cannot be used to introduce those excluded routing or authentication options.

Direct OpenAI interoperability

Applications may configure the official client directly when they do not need the CometAPI-specific defaults:

import os

from openai import OpenAI

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

This is an interoperability option, not the primary cometapi experience.

Explicit non-goals for 0.1

The 0.1 release does not add Anthropic or Gemini adapters, CometAPI account or platform resources, media APIs, provider-neutral message translation, CLI behavior, or custom HTTP/SSE/retry implementations. There are no compatibility aliases named CometClient or AsyncCometClient.

Development

All commands run from this repository root:

uv sync --locked
uv run ruff check src tests scripts
uv run ruff format --check src tests scripts
uv run pyright
uv run pytest -m "not live"
uv run python scripts/check_version.py --require-changelog --require-public-preview-docs
uv run python scripts/check_secrets.py
uv run python scripts/check_workflows.py
rm -rf dist
uv build
uv run twine check dist/*
uv run python scripts/check_artifacts.py dist/*
uv run python scripts/check_clean_install.py dist/*
uv run python scripts/check_repository_independence.py
uv run python scripts/run_actionlint.py

actionlint is static validation, not evidence that a workflow ran successfully on GitHub. See CONTRIBUTING.md and RELEASING.md for the contributor and release gates.

The scheduled/manual trusted smoke checks only the current default branch for ongoing compatibility. It cannot validate or authorize a release. Publication requires a separate protected live job that checks out the exact immutable release commit after default-branch ancestry verification and must succeed before the protected PyPI job becomes eligible.

Support and security

Use the issue tracker for reproducible SDK problems and support@cometapi.com for private support or conduct reports. Use the private security advisory form for vulnerabilities. SUPPORT.md and SECURITY.md define the corresponding scope and handling guidance.

License

MIT. See LICENSE.