sp-rest-proxy

SharePoint REST API Proxy for Node.js and Express local serve. Current stable version is 3.3.6. Release cadence is moderate with periodic updates. Key differentiators: supports SharePoint Online and On-Prem (2019, 2016, 2013, limited 2010), proxies REST API, CSOM, SOAP, and custom services, offers multiple modes (API proxy, socket gateway server, socket gateway client, custom Express embed). Ships TypeScript types. Commonly used with SPFx and PnP JS for local development against real SharePoint data.