DeepLX is a self-hosted translation API server that provides free access to DeepL translation services without requiring a paid API token or account. It functions as a token-free proxy, enabling programmatic text translation between languages through a single HTTP endpoint.
The server accepts JSON-based requests with source and target language parameters, supporting automatic source language detection and validation of language codes. It processes each translation request independently in a stateless manner, and offers optional bearer token authentication to restrict access to authorized clients. The API can be deployed on your own infrastructure for private or team use, with a free oneshot endpoint available that requires no account or authentication.
Documentation covers deployment as a standalone server and API usage through standard HTTP POST requests.