# Lingopal API > Guides and interactive API reference for the Lingopal v2 public API. These docs are organized by user outcomes such as translating text, media, documents, generating subtitles, uploading files, and downloading outputs. The public API authenticates with the `X-API-Key` header. ## Documentation Sets - [Abridged documentation](https://docs.lingopal.ai/llms-small.txt): a compact version of the documentation for Lingopal API, with non-essential content removed - [Complete documentation](https://docs.lingopal.ai/llms-full.txt): the full documentation for Lingopal API ## Notes - The complete documentation includes all content from the official documentation - The content is automatically generated from the same source as the official documentation ## Optional - [Interactive API Reference](https://docs.lingopal.ai/reference): Scalar-powered reference for the Lingopal v2 public API. - [OpenAPI v2 JSON](https://docs.lingopal.ai/openapi/v2.json): Raw OpenAPI specification used by the API reference and endpoint playgrounds.