Blog | mcpr

ChatGPT Creates a New MCP Session for Every Tool Call. Claude Doesn't.

Apr 7, 2026

MCPR Team

We caught ChatGPT and Claude red-handed using the same MCP server completely differently. One creates a fresh session per tool call. The other reuses one. Here’s the data from our proxy dashboard — and why it matters for every MCP server developer.

MCP App CSP Explained: Why Your Widget Won't Render in ChatGPT and Claude

Apr 3, 2026

MCPR Team

Your MCP App widget loads a blank iframe. No error. No hint. Here’s exactly what’s happening — the three CSP domain arrays, the five mistakes that break your widget, and how to debug them.

Introducing MCPR: Open-Source Proxy for MCP Apps

Apr 2, 2026

MCPR Team

MCPR is an open-source, MCP-aware reverse proxy that fixes CSP issues, handles auth, and observes every tool call — so you can ship MCP apps without the infrastructure headaches.