Remote MCP Goes Mainstream: Official Hosted Access for GitHub/Vercel/Supabase

In 2026, Remote MCP is becoming the default access method for Agent toolchains: vendors including GitHub, Vercel, Supabase, Linear, Notion, Stripe, and Figma have provided OAuth-protected Streamable HTTP endpoints, allowing developers to use clients such as Claude Code and Cursor to operate PRs, deployments, and databases without local installation. This paper compares the differences between local stdio and Remote MCP, summarizes official endpoints and configuration commands of each vendor, and interprets the stateless core, MRTR interaction and security practices of the MCP 2026-07-28 specification.