Gomry runs a remote MCP server. Add it to ChatGPT as a developer-mode app and ChatGPT can use Gomry's documented tools for events, attendees, forms, applications and contacts, and read payment records. You ask in plain language. ChatGPT calls the Gomry tool your role already allows.
You sign in with your Gomry account. No API key is involved.
What you need
- A Gomry account with access to the organization you want to work in.
- ChatGPT on the web with developer mode available. OpenAI's developer-mode documentation, checked on 14 September 2026, lists Plus, Pro, Business, Enterprise and Education. Free is not in that published eligibility list. On a managed workspace, an admin may have to allow it.
1. Turn on developer mode
In ChatGPT on the web, open Settings → Security and login, scroll to Developer mode, and turn it on. ChatGPT flags it as elevated risk because it lets you add servers OpenAI has not reviewed. Gomry's server is one of those; the risk note is generic.
2. Create the Gomry app
The Gomry MCP address is:
`` https://www.gomry.com/api/mcp ``
- Open Settings → Plugins → Browse plugins. You land on the Plugins page.
- Select the + in the top right. A New Plugin form opens.
- Name it
Gomry. - Under Connection, leave Server URL selected and paste the address above.
- Leave Authentication on OAuth. ChatGPT reads the OAuth settings from Gomry on its own; you do not need to open Advanced OAuth settings.
- Tick I understand and want to continue, then select Create.
- ChatGPT shows Add Gomry to ChatGPT with a Sign in with Gomry button. Select it. A Gomry page opens, lists what the app can do, and shows the account you are signed in with. Select Authorize.
You are returned to the Gomry app page in settings. It shows your connection email and, under Actions, "No app actions available yet". Select Refresh next to Information. The tool list loads, each marked read or write.
3. Use it in a chat
Open a new conversation and select + in the composer. Choose Developer mode and select Gomry; the exact app selector can vary with the interface. Begin with a read:
- "List my organizations and my upcoming events."
- "Who is checked in for Friday's event, and who is still pending?"
- "Total successful payments by event for last month."
- "Which contacts submitted an application but have not paid?"
ChatGPT shows a "Called tool" line above its answer. Compare the organization names, events, dates, and totals with your dashboard before you trust the rest. When a request could go several ways, name the app: "Use the Gomry app to list attendees for Sunset Sessions."
4. Make one change on purpose
Once reads look right, try one small update your role permits. Name the record and the new value. Write actions require confirmation by default. ChatGPT can remember an approval for a tool within a conversation, so do not assume every later write produces a new prompt. Read what it is about to send; a wrong write changes real data.
What ChatGPT can and cannot see
Access follows your Gomry role. If you cannot open the attendee list in the dashboard, ChatGPT does not get an attendee tool. Requests are checked against the organisations and permissions available to the authenticated user. Name the organisation when the account has access to more than one. ChatGPT adds its own layer. Review the app's permissions and enabled tools. OpenAI documents confirmation for writes by default and an option to remember a tool decision within a conversation. Refresh the tool list when the server's available tools change.
To stop access: open the app under Settings → Plugins, select the menu in the top right, and remove it. Creating it again runs the same Gomry authorization.
The API keys under Organization Settings in Gomry are a different thing. They are for code you write against the Gomry API and do not work in ChatGPT. The app needs no key at all.
Troubleshooting
The address shows an error in the browser. Expected. The MCP endpoint answers requests from ChatGPT, not page visits. If you open it directly you see a message about missing authentication. Paste it into the app form instead.
The app shows "No app actions available yet". Select Refresh on the app page in Settings → Plugins. The tools load after the first sign-in.
ChatGPT cannot reach the server. Check that you pasted the exact address with no extra path. ChatGPT connects from OpenAI's servers, so a server on your laptop or private network would not work; Gomry's endpoint is public.
A tool is missing. Check the role of the Gomry account you signed in with. If Gomry added tools after you created the app, open the app and refresh its tools.
Reads work, a write does not. Check that the tool is enabled in the app and that your Gomry role allows the action. A successful read says nothing about a specific write.
The connection stopped working. Remove the app under Settings → Plugins and create it again. You go through the same Gomry authorization.
Ask for one named event and compare the result with the dashboard. The AI operations guide explains the difference between reading a payment and being able to change it.