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Connect Entergram to ChatGPT

Connect Entergram to ChatGPT as a custom MCP connector using Developer Mode, so you can read and act on your Telegram CRM from a chat.

MCP Server URL:

https://mcp.entergram.com/mcp

Before you start

Section titled “Before you start”
  • An Entergram workspace with owner or admin access.
  • A paid ChatGPT plan — Plus, Pro, Business, Enterprise, or Education. Custom MCP connectors are not available on the free plan. On Business/Enterprise, a workspace admin must enable Developer Mode first.
  • No download required. Developer Mode and custom MCP connectors run in the ChatGPT web app at chatgpt.com (the desktop app works too). ChatGPT only supports remote, HTTPS MCP servers — Entergram qualifies, so there’s no local bridge to install.

Developer Mode gives ChatGPT full read/write access to the connected tools. Write actions ask for confirmation by default — always review the tool input before approving anything that changes data.

Step 1 — Enable Developer Mode

Section titled “Step 1 — Enable Developer Mode”

In ChatGPT, go to Settings → Apps & Connectors → Advanced settings and toggle Developer mode on. Accept the warning about third-party tools.

If you don’t see Advanced settings, confirm you’re on a paid plan; on Team/Enterprise, your admin must enable Developer Mode for the workspace.

Step 2 — Copy your MCP URL from Entergram

Section titled “Step 2 — Copy your MCP URL from Entergram”

In Entergram, go to Settings → Workspace → Connectors → MCP and copy your MCP server URL (https://mcp.entergram.com/mcp).

Step 3 — Add the connector in ChatGPT

Section titled “Step 3 — Add the connector in ChatGPT”

Go to Settings → Apps & Connectors and click Create (Add custom connector). Fill in:

  • Name: Entergram
  • MCP server URL: https://mcp.entergram.com/mcp
  • Authentication: OAuth (no client ID or secret needed — ChatGPT discovers Entergram’s login automatically)

Click Create.

Step 4 — Authorize

Section titled “Step 4 — Authorize”

ChatGPT opens an OAuth popup. Log in with your Entergram account (just like a “Sign in with Google” prompt), review the permissions, and click Allow access. (Make sure pop-ups aren’t blocked.)

Log in with your Entergram account and click Allow access

Step 5 — Use it

Section titled “Step 5 — Use it”

In a chat, open the + / Developer Mode menu in the composer and enable Entergram. Then try: “List my Entergram workspaces.”

Troubleshooting

Section titled “Troubleshooting”
  • No “Add custom connector” / “Create” button — Developer Mode isn’t on, or your plan doesn’t support it. Re-check Step 1.
  • The OAuth/login popup never opens — your browser is blocking pop-ups. Allow pop-ups for chatgpt.com and retry.
  • Can’t connect / “invalid URL” — re-copy the MCP server URL from Settings → Workspace → Connectors → MCP and make sure there’s no trailing space.
  • 403 errors on tool calls — your Entergram account needs owner or admin access to the workspace, and your plan must include MCP access.

Need the bigger picture? See the MCP Connector overview.