Connect Onlypult to ChatGPT

Use ChatGPT Developer mode to add the Onlypult MCP server as a custom app. This works without the paid Connectors feature — you create a private app, authorize via OAuth, then invoke it in chat with @Onlypult.

🔗

MCP Server URL: https://mcp.onlypult.com/mcp
Authentication: OAuth 2.1 (sign in with your Onlypult account).

💡

Alternative: ChatGPT Plus/Pro users can add the server via Settings → Connectors → Add custom connector. See the main MCP guide for that path.

Overview

Developer mode lets you register unverified MCP connectors as private apps. The flow:

Enable Developer mode in ChatGPT settings
Create a new app pointing to https://mcp.onlypult.com/mcp
Sign in with Onlypult when prompted
Mention @Onlypult in any chat to use MCP tools

Prerequisites

An active ChatGPT account
An active Onlypult account with connected social profiles
Developer mode available in your ChatGPT region (Settings → App Preferences)

Step 1 — Open settings

Click your profile icon in ChatGPT, then open Settings. In the left sidebar, go to App Preferences, then open the Apps tab.

ChatGPT Apps settings with Create app button under Advanced settings — Apps — Advanced settings and Create app

Step 2 — Enable Developer mode

Click Create app under Advanced settings (or open an existing draft). On the next screen, turn on Developer mode.

Developer mode allows unverified MCP connectors. Read the risk notice — you are adding a third-party server you trust.

ChatGPT Apps settings with Developer mode toggle enabled — Enable Developer mode, then go back to Apps

Return to the Apps tab — the Create app button is now available under Advanced settings (see Step 1).

Step 3 — Create the Onlypult app

Click Create app and fill in the form:

Field	Value
Name	`Onlypult` (or any label you prefer)
Description	Optional, e.g. A single platform for scheduling posts
Connection	Server URL → `https://mcp.onlypult.com/mcp`
Authentication	OAuth

Check the consent box acknowledging MCP server risks, then click Create.

New App form filled with Onlypult name, MCP server URL, and OAuth authentication — New App — Server URL and OAuth

Step 4 — Connect and authorize

Open your newly created Onlypult app from the Drafts list (it shows a DEV badge). Click Connect.

Onlypult app details page with Connect button highlighted — App details — click Connect

ChatGPT opens an authorization dialog. Click Sign in with Onlypult. You will be redirected to the Onlypult consent page — log in if needed and click Allow access.

Add Onlypult to ChatGPT dialog with Sign in with Onlypult button — OAuth — Sign in with Onlypult

After approval, the app status changes to connected. You only need to authorize once per app.

Step 5 — Use Onlypult in chat

Start a new chat and mention the app explicitly with @. Type @Onlypult (or the name you chose), then your request.

ChatGPT input with @Onlypult mention and a sample request — Mention @Onlypult in the chat input

ChatGPT routes the request to the Onlypult MCP server. Example — list connected profiles:

You

@Onlypult Show my connected social profiles

ChatGPT response showing a table of connected social profiles from Onlypult — Response — profiles from your Onlypult account

Other things you can ask:

@Onlypult Post "Hello world!" to Instagram now
@Onlypult Schedule a LinkedIn post for tomorrow at 9am
@Onlypult List my failed posts and retry them

See the full tool reference for everything the MCP server supports.

⚠️

Important: Always include @Onlypult (or your app name) in the message. Without the mention, ChatGPT will not call the MCP tools.

Troubleshooting

I don't see App Preferences or Developer mode

These options roll out gradually. Try updating ChatGPT or use the Connectors path if you have ChatGPT Plus/Pro. You can also use Cursor or Claude.ai instead.

Authorization fails or loops

Make sure you are logged into the correct Onlypult account. Clear the app and recreate it, then authorize again. The consent page must show Allow access — if you see an error, check that your Onlypult session is valid.

ChatGPT doesn't call Onlypult tools

Confirm the app shows as connected (not just created) in Apps → Drafts
Include @Onlypult at the start of your message
Start a fresh chat after connecting — existing chats may not pick up the new app

Need help with MCP tools?

See MCP Server documentation — tool list, media upload flow, and OAuth details.