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The OpenRouter Python SDK gives you type-safe access to 400+ models across providers through a single unified API, with both sync and async clients.

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Installation

pip install openrouter

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Quickstart

from openrouter import OpenRouter
import os

with OpenRouter(
    api_key=os.getenv("OPENROUTER_API_KEY", ""),
) as open_router:
    res = open_router.chat.send(
        messages=[
            {"content": "What is the capital of France?", "role": "user"},
        ],
        stream=False,
    )
    print(res)

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API reference

Browse the API reference for each resource in the sidebar. Type definitions for every request, response, and model are linked inline from each resource page.