ChatGPT MCP and Apps: extensions you can try

OpenAI's official MCP Extensions repo lets custom plugins appear as native ChatGPT sidebar entries, file viewers and forms, with TypeScript and Python SDKs.

A ChatGPT news plugin lets users set interests, get scheduled news with summaries and charts, give thumbs-up or thumbs-down feedback, and discuss items in chat, all built on Sites, MCP and plugin extensions.

three.ws's 3D Studio connector gives ChatGPT 11 keyless 3D tools, and the same server is listed on the official MCP Registry so any MCP client can reach it.

The author describes a flow where a Dot directs a cloud Codex thread to build software, hosts a database and MCP server on ChatGPT Sites, and packages it as an installable sidebar plugin with ChatGPT sign-in.

A developer built a news plugin for their Dot with an MCP server hosted on ChatGPT Sites and plugin extensions, noting it still has rough edges.

FTP Tech's hosted MCP connector is live, letting ChatGPT, Claude and Perplexity pay for web services from a Canton MainNet wallet, capped at 5 CC per payment and 20 CC per day.

The author shows a ChatGPT news plugin built on a Sites MCP server with help from Dot, still rough but taking shape.

Connecting the PayBox MCP endpoint to ChatGPT, Claude or Grok lets users send stablecoins across multiple chains using just a recipient's X username.

The marketing agent carries brand context across posts, emails and landing pages and requires human approval before anything is published or spent, and is now available in ChatGPT, Claude, Grok and other MCP clients.

The author used ChatGPT Sites and Plugin Extensions to build a management service that hosts an MCP server and UI on Sites, letting Codex's side panel manage FM-1 custom firmware.

Connecting Zapier MCP to Muse lets the agent reach 9,000+ apps such as HubSpot, Airtable and LinkedIn and 30,000+ actions, with four sample prompts to try.

Upstash shipped its second MCP-related release in two weeks, a plugin extension that amounts to running the Upstash Console inside ChatGPT.