ChatGPT MCP and Apps: extensions you can try

vibekit is a free toolkit with an MCP server and ready-made app templates that lets ChatGPT, Claude and other AI tools generate token pages, buy bots and mini apps without coding.

F1ow is a newly launched MCP server that gives Claude, ChatGPT, Cursor or custom agents live crypto market data through one endpoint and one subscription.

A Q3 recap notes that Roadmappy launched an MCP server compatible with both Claude and ChatGPT, and has earned a 4.8 rating on G2.

The developer finished Gexpense's MCP server, which imports email receipts into the expense tracker from ChatGPT or any agent, and notes that shipping it still requires a ZIP submission and OpenAI review.

TradesViz's trading journal now connects to ChatGPT, Claude, Grok and other MCP assistants, and lets users build Python analysis, dashboards and trading psychology workflows on top of their journal.

Medusa's MCP is in beta for Launch and Scale users, with a Claude connector already available and an official ChatGPT app in the works.

tunnel-client is the customer-run agent behind Secure MCP Tunnel, connecting a private or localhost MCP server to ChatGPT, Codex, the Responses API, and AgentKit.

A post lays out the full process for adding the PayBox MCP server in ChatGPT developer mode and authorizing it with OAuth.

After updating an MCP server, the health check and new schema were fine, but ChatGPT still read the old tool definition until the catalogue was refreshed.

A fitness app developer says users must copy an activation prompt, switch to Work mode and paste it to enable event subscriptions, even after connecting the plugin.

The author calls ChatGPT the OS and plugin extensions the apps, and says mcp-use now supports them via npx create-mcp-use-app.

The open-source library mcp-use now supports ChatGPT plugin extensions, which its author describes as "Next.js but for MCP".