Machine Library is a search and AI product from Space Frontiers Company, designed to help people and AI agents explore research and reference material. Its corpus contains 105.2 million documents, including academic papers, scholarly publications, books, patents, encyclopedias, magazines, YouTube transcripts, and public discussions from Reddit and Telegram. The service offers full-text retrieval where available, alongside search across scholarly metadata and abstracts.

Users can explore the corpus through a web app, automate research with a REST API, or connect AI agents through an MCP server. Results include canonical source URIs and bounded text passages, supporting citation review and traceable research workflows. Machine Library highlights applications such as systematic review discovery, patent prior-art searches, and citation-grounded answers, while cautioning that retrieved text should be reviewed rather than treated as proof.

The company also offers bulk corpus access under licenses for research, AI training, and commercial use. API access uses a key and per-request pricing. Its documentation, methodology, and corpus information are available to help users assess the service.