ChatGPT

In ChatGPT, postevi connects as a custom MCP server in one of two ways, and developer mode in Settings decides which one you get.

With developer mode

If Settings shows developer mode, you get every tool your permissions allow: drafts, the calendar, the inbox, automations and analytics.

In ChatGPT, go to Settings > Apps > Advanced settings and turn on Developer mode.
Create a new app with postevi as the name and the MCP server URL as the address.
```
https://postevi.app/api/mcp
```
Choose OAuth as the authentication method and save the app.
Sign in on the postevi page that opens, pick a workspace and approve the permissions.
Pick postevi in a chat and ask away. ChatGPT asks before anything that makes a change, such as scheduling a post.

Add the URL as a custom connector with OAuth. This way ChatGPT only uses two read-only tools, search and fetch.

Open the screen for adding a custom connector in ChatGPT and enter postevi as the name.
Paste the MCP server URL into the address field.
```
https://postevi.app/api/mcp
```
Choose OAuth for authentication and save.
Sign in on the postevi page that opens and pick a workspace.
Ask about your posts, automations and accounts in a chat or in deep research. ChatGPT finds and reads them and never changes anything.

The Codex CLI, the IDE extension and the ChatGPT desktop app share one MCP config, with every tool your permissions allow.

Run this in your terminal.

codex mcp add postevi --url https://postevi.app/api/mcp

Run the login command and sign in to postevi in the browser window that opens.
```
codex mcp login postevi
```
On a machine without a browser, add --no-browser to the login command and open the link it prints on another device.
Prefer a config file? Add this block to ~/.codex/config.toml. The writes setting asks for approval only on tools that make changes.
```
# ~/.codex/config.toml
[mcp_servers.postevi]
url = "https://postevi.app/api/mcp"
default_tools_approval_mode = "writes"
```

ChatGPT can't send an API key, so both ways sign in with OAuth.
Custom servers are added from ChatGPT on the web.
You can remove the connection from ChatGPT's settings at any time, or switch it off from the AI page in postevi.

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