Prerequisites
- A ChatGPT Pro, Plus, Business, Enterprise, or Education account on the web (Developer mode — not available on Free; not guaranteed on mobile)
- A TryPost Cloud account with an active trial or subscription (start a 7-day free trial)
Setup
1
Enable Developer mode
In ChatGPT on the web, open Settings → Security and login and turn on Developer mode.If that toggle is missing, try Settings → Apps → Advanced settings. On Business / Enterprise / Education workspaces, an admin may need to allow Developer mode first.
2
Create a developer-mode app
With Developer mode on, open Settings → Plugins or Settings → Apps (OpenAI has been renaming this surface; chatgpt.com/plugins also works) and click + to create a developer-mode app.Fill in:
For authentication, use OAuth. Leave Client ID / Secret blank if shown — TryPost supports Dynamic Client Registration and discovers OAuth from the URL.
3
Authorize and review tools
Create the connection. Complete the TryPost OAuth sign-in if prompted (Allow). Open the app details page to review discovered tools; you can toggle tools on or off and Refresh later when the MCP server changes.
4
Use TryPost in a conversation
Start a new chat. From the composer + / Plus menu, choose Developer mode, enable the TryPost app for that conversation, and ask:ChatGPT will call the TryPost tools to fetch your posts.
ChatGPT only connects to remote HTTPS MCP servers (from OpenAI’s infrastructure). The hosted endpoint
https://app.trypost.it/mcp/trypost works out of the box. Self-hosted instances must be publicly reachable over HTTPS — local stdio MCP servers are not supported.Write actions (create, update, publish, delete) require confirmation by default in Developer mode. Review each tool payload before approving. Tools annotated as read-only skip that confirmation.