Use Reynforce in ChatGPT

Last updated 20 October 2026

A ChatGPT workspace admin adds your Reynforce workspace's address as a custom app, and then you sign in with your work account. ChatGPT can then search your register, and it may ask you to confirm before a change.

Not tried yet. Nobody has connected ChatGPT to Reynforce. The same sign-in problem that stopped Claude on 20 October 2026 applies here, and its fix is waiting to go out. Until somebody has done it end to end, treat every step below as untested.

What you need first

A Reynforce workspace, and to be a member of it. Your workspace's address is on your workspace's Settings page, under Use it from Claude. The same address works for any MCP client. It looks like https://app.reynforce.com/t/<your workspace>/mcp.
A ChatGPT plan that can add a custom MCP app with write actions. OpenAI's help page says that is in beta for Business, Enterprise and Edu. On Pro an app can only read, so Reynforce's search would work and the tools that record or change something would not.
ChatGPT on the web. OpenAI says these apps are not available on mobile.

Add it (a workspace admin)

Turn on developer mode: Workspace Settings > Permissions & Roles > Connected Data, then turn on Create custom MCP connectors.
Go to Workspace settings > Apps and click Create.
Enter a name (Reynforce) and your workspace's address as the server.
Choose OAuth for authentication, and sign in with your work account when asked.
Click Scan Tools and wait. A signed-in member should see up to seven tools.
Click Create. The app is now a draft under Apps > Drafts.
Try it in a chat (below). When it works, go to Apps > Drafts and click Publish so the rest of your workspace can use it.

On Enterprise and Edu, Configure Actions in the publish step chooses which tools are allowed. OpenAI says new actions are off by default, so switch on the ones you want.

Use it in a chat

Open a new chat and pick Reynforce from the tools menu, or mention it by name. ChatGPT applies an app to one message at a time, so mention it again when a follow-up needs the register. Then ask in plain words:

"Search the register for what we say about data residency."
"Check whether I can promise this customer a go-live date of 1 December."

What each tool does

Tool	What it does	Changes anything?
Search the register	Finds lines your company stands behind, each with its owner, its last check and whether it may be used	No
Check an action against the mandate	Asks whether an action is allowed, and writes the check down	Adds a record only
Propose claims	Turns a document into proposed lines for a person to accept	Adds proposals only
Set a claim's owner	Names who stands behind a line	Yes
Accept one claim	Accepts a single proposed line	Yes
Confirm a claim is still true	Marks a line as checked today	Yes
Contest a claim	Says a line is wrong, so no agent may use it until it is settled	Yes

Every tool tells ChatGPT whether it only reads, whether it changes something a person relies on, and that it touches nothing outside your own register. OpenAI says ChatGPT may ask you to confirm a change, depending on the app's permissions and the action. We have not seen which of the four it asks about, so read the confirmation before you approve one.

If it does not work

What you see	What it means	What to do
The sign-in step fails before a Reynforce page appears	Our sign-in could not be found. This is ours	Tell us at [email protected]
Scan Tools finds nothing after you signed in	Most often, the account you signed in with is not a member of this workspace	Check you used your work account, then ask whoever runs your workspace to add you
A tool worked yesterday and errors today	OpenAI says an approved app uses a frozen copy of its tools until an admin refreshes them	An admin refreshes the app's actions
You keep being asked to sign in again	OpenAI says access can expire for some sign-ins	Sign in again. Tell us if it happens daily

What ChatGPT sends us

Only what each tool needs: your search words, the action you describe, and the line you act on. Not your conversation. What we hold has the full account.

OpenAI's steps are from its help page Developer mode and MCP apps in ChatGPT, read on 20 October 2026. It does not name every field in the form, so a label here may differ from what you see. That page is the one to trust.