{"service":"URL to DOI Extraction Service","version":"1.0.0","description":"Extract DOI from academic paper URLs using publisher-specific translators","endpoints":{"GET /health":"Health check","GET /extract-doi?url=URL":"Extract DOI from single URL","POST /extract-doi":"Extract DOI from single URL (JSON or text body)","POST /extract-doi-batch":"Extract DOI from multiple URLs (JSON array)","GET /":"This documentation"},"supportedPublishers":["ScienceDirect","MDPI","Nature","arXiv","Generic (fallback)"],"examples":{"singleUrl":"GET /extract-doi?url=https://www.mdpi.com/2077-0375/15/2/53","batchUrls":"POST /extract-doi-batch {\"urls\": [\"url1\", \"url2\"]}"}}