ENG-7811: mcp doc (#1642)

* mcp doc

* Apply suggestion from @greptile-apps[bot]

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

---------

Co-authored-by: Simon Young <[email protected]>
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: 3 people

docs/ai_builder/integrations/mcp_installation.md

@@ -31,10 +31,7 @@ Add the Reflex MCP server to your Claude Desktop configuration by editing your c
   "mcpServers": {
     "reflex": {
       "command": "npx",
-      "args": ["-y", "@modelcontextprotocol/server-proxy"],
-      "env": {
-        "MCP_PROXY_URL": "https://mcp.reflex.dev/mcp"
-      }
+      "args": ["-y", "mcp-remote", "https://mcp.reflex.dev/mcp"]
     }
   }
 }
@@ -62,8 +59,7 @@ Add this configuration to your `~/.codex/config.toml` file:
 ```toml
 [mcp_servers.reflex]
 command = "npx"
-args = ["-y", "@modelcontextprotocol/server-proxy"]
-env = { "MCP_PROXY_URL" = "https://mcp.reflex.dev/mcp" }
+args = ["-y", "mcp-remote", "https://mcp.reflex.dev/mcp"]
 ```
 
-Note: Codex requires MCP servers to communicate over stdio. The `@modelcontextprotocol/server-proxy` adapter bridges the connection to the HTTP-based Reflex MCP server.
+Note: Codex requires MCP servers to communicate over stdio. The `mcp-remote` package bridges the connection to the HTTP-based Reflex MCP server.