MCP client
MCP client: The connector inside a host application that holds one connection to one MCP server. Example: Vercel lists Claude Code, Cursor and Codex CLI among clients that connect to Vercel MCP. Next in the glossary is MCP gateway: A proxy in front of MCP servers that authenticates callers, injects upstream credentials, filters tools and logs calls.
Definition
The connector inside a host application that holds one connection to one MCP server.
Example, with source
Vercel lists Claude Code, Cursor and Codex CLI among clients that connect to Vercel MCP. (vercel.com, read 4 November 2026)
Where it appears on this site
Neighbouring terms
- MCP Apps: An MCP extension in which a tool points to a ui:// resource the host renders as a sandboxed View.
- MCP gateway: A proxy in front of MCP servers that authenticates callers, injects upstream credentials, filters tools and logs calls.
- MCP host: The LLM application that starts client connections and asks the user for consent.