ChatGPT MCP and Apps: extensions you can try

Walmart launched an MCP server called Agent Gateway, live with ChatGPT, Gemini and Meta's Muse, letting approved agents search inventory and buy without seeing payment details.

Musebook is a storybook town run by Meta's Muse assistants; an official muse.txt lets Muse or agents like ChatGPT, Gemini, Claude and Grok join and issue a link code to view the town through your muse.

WordPress form plugin Formidable Forms 7.0 ships built-in MCP on every plan including the free one, letting Claude or ChatGPT manage forms, entries, styles and payments.

Paste 100 domains to see each one's exposed PHP version and whether it is patched, with a fix prompt per result openable in Claude or ChatGPT, plus an API and MCP server.

An SEO tip: build an MCP server for your SaaS, submit it as a ChatGPT plugin, and once approved you get a dofollow backlink from an OpenAI domain.

The author used Claude Code and OpenAI's Apps SDK docs to ship an MCP server that returns copyable prompts as a card inside ChatGPT, and shares the full build steps and prompt.

Security scanner FYEO released an MCP server that lets Claude or ChatGPT read scans and findings, walk through fixes, and queue a new scan.

A single MCP URL pasted into ChatGPT, Claude, Gemini, Cursor or Grok gives the AI 153 tools like live prices and scam checks, plus memory and checkable run receipts.

A developer asks whether models pick correctly when an app exposes both server MCP tools and in-frame WebMCP tools, or whether developers must hint which to use.

Solana trading and AI platform OrbitX says it hardened security platform-wide; wallets are PIN-encrypted and AI assistants trading via MCP cannot export private keys.

Craig Dennis builds a cookie clicker on ChatGPT Sites with a database for click counts and MCP tools, demoing ChatGPT querying the count and Codex CLI clicking the cookie, with chaptered video.

A Spanish-language post promotes prompts.chat, a free open-source prompt library with 173K GitHub stars that works with ChatGPT, Claude and Gemini via CLI, MCP server or Claude Code plugin, with public-domain prompts and self-hosting.