ChatGPT MCP and Apps: extensions you can try

ether.fi launched read-only AI Connections letting Claude, ChatGPT or any MCP assistant view transactions, cards and balances, with permissions off by default and expiring after 90 days, plus new statement exports.

The author says testing confirms free ChatGPT accounts can use MCP server extensions with studiocat.app for vibe coding, with screenshots attached.

f1ow is building an MCP server that connects ChatGPT, Claude, Cursor, or custom agents to live crypto market data through a single endpoint, replacing multiple data subscriptions.

Envato's free MonoDesk tool turns enquiries into proposals, signed proposals into projects, and handles client approvals and invoicing, all reachable through MCP from Claude or ChatGPT.

After making adjustments, the author enabled ChatGPT Sites for internal company use and plans to build internal tools with plugin extensions.

Browser-based workspace MonoDesk offers an MCP server so Claude, ChatGPT and Cursor can look up projects inside it.

A PayPal Braintree engineer breaks down three agent payment paths: ChatGPT's MCP app with Agentic Commerce Protocol tokenization, Google AI Mode via Universal Commerce Protocol, and an MCP widget handing off to external checkout.

The ChatGPT plugins team advises against hiding tools behind a discovery meta tool, warns that bloated tool descriptions get truncated, and recommends accurate read-only/destructive annotations plus server instructions.

Envato launched MonoDesk, a free app that turns enquiries into signed proposals, projects, time tracking, client approvals and invoices, with an MCP option for Claude or ChatGPT to run the steps.

docs.plus built its MCP server on Supabase, letting users connect ChatGPT or Claude to create and edit documents, with a try-it link included.

Supabase shows how to give your app its own MCP server so customers can use it from ChatGPT or Claude with their existing accounts.

A 10-minute video shows connecting ChatGPT, Claude, Cursor and other MCP clients to live retail prices and price history via one URL.