ChatGPT MCP and Apps: extensions you can try

The author reports Claude called his ContentMaschine MCP tools on the first try while ChatGPT refused, and is now retesting with Terra.

A developer reports that roughly half of their MCP signups now come from the ChatGPT mobile app and asks whether others see the same mobile surge.

The author builds a read-only MCP server exposing IFC model data to ChatGPT and Gemini, getting identical findings and arguing MCP makes answers checkable rather than smarter.

An AI search optimization tool connectable to ChatGPT that tracks how often ChatGPT, Gemini and Claude mention your brand, compares share of voice with competitors, and rewrites pages to earn more citations.

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

A video walkthrough of calling Seedance, Veo and Kling models through Sunra MCP inside ChatGPT, Claude and Cursor, paying API prices from one balance.

The author built one Spanish-learning app twice, as a Muse artifact and as a ChatGPT custom plugin backed by ChatGPT Sites with an MCP server, finding Muse faster to iterate while Sites wins on auth and scale.

Connecting Codex to a signed-in Chrome session failed with this error; the real cause was a macOS Files & Folders permission attributed to iTerm2, not ChatGPT.

A demo combining a ChatGPT plugin, MCP, and a Fabinho agent to create a coupon automatically, with a screenshot.

A user runs the Dfinity Internet Computer MCP connector inside ChatGPT to locate MULTI/DEX canisters and pull ICP network and DeFi stats such as TVL and weekly DEX volume.

The author found his transit MCP server logged 22k requests in a single day and 75k for the week, and credits the ChatGPT plugin directory for much of the traffic.

The author used Pika's ChatGPT plugin to generate a Pepsi-style ad by describing shots in conversation, and shared the install link.