{"slug": "how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api", "title": "How to Connect an OpenAI SDK App to an OpenAI-Compatible API", "summary": "Route Key, an OpenAI-compatible AI API gateway and multi-model router, has published a guide for migrating OpenAI SDK applications to its platform. The guide details changing the API key, base URL, and model ID, and emphasizes verifying model-specific behaviors before moving production traffic.", "body_md": "Many applications already use the OpenAI SDK. Moving to another compatible gateway should not require rewriting the whole application. In most cases, the main changes are the API key, base URL, and model ID.\n\nThis guide shows the basic migration flow with Route Key, an OpenAI-compatible AI API gateway and multi-model router.\n\nBefore starting, prepare:\n\nYou can review the current supported models and pricing signals in the [Route Key model catalog](https://routekey.ai/en/pc/models).\n\nFor Python:\n\n```\npip install openai\n```\n\nFor Node.js:\n\n```\nnpm install openai\n```\n\nKeep the API key in an environment variable. Do not put it directly in source code or commit it to a public repository.\n\n```\nexport ROUTEKEY_API_KEY=\"your-api-key\"\nexport ROUTEKEY_MODEL=\"your-supported-model-id\"\n```\n\nThe request format can stay familiar. Point the SDK to the Route Key compatible endpoint:\n\n``` python\nimport os\nfrom openai import OpenAI\n\nclient = OpenAI(\n    api_key=os.environ[\"ROUTEKEY_API_KEY\"],\n    base_url=\"https://api.routekey.ai/v1\",\n)\n\nresponse = client.chat.completions.create(\n    model=os.environ[\"ROUTEKEY_MODEL\"],\n    messages=[\n        {\"role\": \"user\", \"content\": \"Explain API routing in one paragraph.\"}\n    ],\n)\n\nprint(response.choices[0].message.content)\n```\n\nThe exact model ID must come from the current catalog. Do not assume that every provider model supports the same endpoint, tool schema, context length, or streaming behavior.\n\nStart with a short non-streaming request. Check:\n\nIf the request fails, verify that the API key is active, the model ID is supported, and the `/v1`\n\npath has not been duplicated by the SDK configuration.\n\nAfter the basic request works, test streaming separately. Then add:\n\nA compatible gateway makes it easier to change routing policy without changing every application integration. However, you should still verify tool calls, structured output, image or audio endpoints, and provider-specific behavior before moving production traffic.\n\nBefore switching production traffic:\n\nFor the full setup flow, see the [Route Key integration guide](https://routekey.ai/en/pc/docs/integrations). The [official Route Key website](https://routekey.ai/) includes the model catalog, documentation, and additional integration resources.", "url": "https://wpnews.pro/news/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api", "canonical_source": "https://dev.to/routekeyai/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api-27i7", "published_at": "2026-07-31 11:41:17+00:00", "updated_at": "2026-07-31 12:03:41.649961+00:00", "lang": "en", "topics": ["developer-tools", "ai-infrastructure"], "entities": ["OpenAI", "Route Key"], "alternates": {"html": "https://wpnews.pro/news/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api", "markdown": "https://wpnews.pro/news/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api.md", "text": "https://wpnews.pro/news/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api.txt", "jsonld": "https://wpnews.pro/news/how-to-connect-an-openai-sdk-app-to-an-openai-compatible-api.jsonld"}}