Search and retrieve scientific papers from arXiv. Provides paper metadata (title, authors, abstract, categories) and PDF links via the official arXiv API.
Google Programmable Search Engine (Custom Search JSON API) lets you run web and image searches via API using an API key and a search engine (cx) identifier.
Internet Archive's Wayback Machine is a digital archive of the World Wide Web. Access historical snapshots of websites, retrieve archived pages, check URL availability across time, and explore...