MakeHybrid in ChatGPT
One address turns your LinkedIn account, your messaging channels and your work trackers into tools your AI can use. There is nothing to download and no configuration file to edit.
The address
https://makehybrid.com/mcp
That is the whole configuration, and it is the same address for everybody. Paste it wherever the app asks for an MCP server URL.
It signs you in itself. The first time the connector is used it opens a MakeHybrid sign-in, you choose which of your organizations it may act for, and it is given a key of its own. Nothing to paste and nothing to copy out of a settings screen — and you can revoke that key from your dashboard whenever you like, without touching the others.
ChatGPT
Open chatgpt.com/plugins, press Add and look for Create MCP App — or, on an account that still shows it, Settings → Connectors → Add custom connector. Paste the address as the server URL and accept the warning it shows about connecting a server that is not OpenAI's.
You have to be signed in there already, or it opens a sign-in page instead of the setting.
Written loosely on purpose: OpenAI has moved this setting more than once, has renamed it more than once, and does not offer it on every plan — at the time of writing the toggle that opens it sits under Settings → Security and login, and some accounts do not have it at all. If you cannot find it, your plan does not have it yet; use one of the other apps on this page, or call the API from your own code. OpenAI's current page is help.openai.com, and it is the one to believe if this page and that page ever disagree.
Codex
In a terminal, run codex mcp add makehybrid --url followed by the address in quotes. By hand it is a [mcp_servers.makehybrid] block with a url line in ~/.codex/config.toml, and no command line in the same block: Codex refuses a server described both ways.
Check it worked. Ask it to “list my connected LinkedIn accounts”. If it answers with your accounts, everything is wired up. If it says it has no such tool, the connector is added but not switched on in that conversation.
Anything else that speaks MCP
Any assistant that speaks MCP over HTTP takes the same address and nothing else. If it asks for a transport, it is a remote server over HTTP, not a command to run. The clients without a page of their own — and the addresses that carry a key instead of a sign-in, for a client that cannot sign in at all — are in the reference.