Kaien API provides one API key and an OpenAI-compatible API surface for text, image, video, audio, file, embeddings, reranking, and realtime workloads. Claude and Gemini clients can also connect through their native protocols. For a new integration:
  1. Create or select an API key in the console.
  2. Call the model list and confirm the model IDs available to that key.
  3. Choose an interface for your workload: text, image, video, audio, or files.
  4. Run a minimal request before adding streaming, tools, reference images, or task polling.
  5. Review usage and charges in the console.

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Basic information

Production base URL:
Default authentication:
Claude native requests may also use x-api-key. Gemini native requests may use x-goog-api-key or ?key=. Use Bearer authentication unless a client requires a native header.

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Handling results

Response shapes depend on the interface:
  • Text usually appears in choices[0].message.content or the Responses output array.
  • Image results may be returned as a URL or base64 data.
  • Video and music requests usually create a task first, then return a task ID for polling.
  • File APIs have separate upload, retrieve, download, and delete operations.
Save long-lived image, video, and audio results to your own object storage.

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AI-readable documentation

The documentation can be read directly by AI tools: These entry points are designed for Codex, Claude Code, Cursor, OpenCode, n8n, and other tools that can read Markdown or web pages.