Use Reynforce in Claude
Last updated
Add your workspace's address to Claude as a custom connector and sign in with your work account. Claude can then search your register before it answers, and it asks you before every change that puts your name on a line.
Not working yet. On 20 October 2026 Claude could not sign in to a workspace and answered "Couldn't register with reynforce's sign-in service". We found why and the fix is waiting to go out. This page will say so when it has been tried end to end.
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. It looks like
https://app.reynforce.com/t/<your workspace>/mcp. - A Claude plan that can add a custom connector. Claude's own page says the Free, Pro, Max, Team and Enterprise plans can. On Free you can add one.
- On a Team or Enterprise plan, an Owner adds it for the organisation, and you then connect with your own account.
Add it: Free, Pro or Max
- In Claude, go to Customize > Connectors.
- Click Add custom connector.
- Paste your workspace's address into the server URL.
- Leave the OAuth fields empty. Reynforce does not need a client ID.
- Click Add.
- Click Connect. A Reynforce sign-in page opens. Sign in with your work account, the one your workspace knows.
You are back in Claude, and the connector shows as connected.
Add it: Team or Enterprise
- An Owner goes to Organization settings > Connectors, selects Add, then Custom, and chooses Web if asked.
- They paste the workspace's address, leave the OAuth fields empty, and click Add.
- Each member goes to Customize > Connectors, finds Reynforce with the Custom label, and clicks Connect to sign in.
Use it in a chat
Click + in the chat, choose Connectors, and turn Reynforce on for that conversation. Then ask in plain words:
- "Search the register for what we say about SSO."
- "Check whether I can offer this customer 15% off before I reply."
- "Show me the lines I own that are overdue for a check."
What each tool does, and when Claude asks you first
Claude asks before a tool that changes something a person relies on. Reading never asks.
| What you see in Claude | What it does | Does Claude ask first? |
| Search the register | Finds lines your company stands behind, each with its owner, its last check and whether it may be used | No. It only reads |
| Check an action against the mandate | Asks whether an action is allowed, and writes the check down | No prompt every time. It adds a record and changes nothing else |
| Propose claims | Turns a document into proposed lines. They stay proposals until a person accepts each one | No prompt every time. A proposal changes nothing anyone relies on |
| Set a claim's owner | Names who stands behind a line | Yes, every time |
| Accept one claim | Accepts a single proposed line | Yes, every time |
| Confirm a claim is still true | Marks a line as checked today | Yes, every time |
| Contest a claim | Says a line is wrong, so no agent may use it until it is settled | Yes, every time |
The last four ask every time on purpose. Each one puts your name on a line, and a name added to forty lines in one click means nothing.
If Claude offers Always allow, think before you click it for those four. You can also block a tool under Customize > Connectors: select Reynforce and set that tool to Blocked.
If it does not work
| What you see | What it means | What to do |
| "Couldn't register with reynforce's sign-in service" | Claude could not find our sign-in. This is ours, not yours | Tell us at [email protected]. Nothing you change will fix it |
| You sign in, and then Claude reports an error or shows no Reynforce tools | Most often, the account you signed in with is not a member of this workspace | Check you used your work account. If you did, ask whoever runs your workspace to add you, then reconnect |
| "Couldn't reach the MCP server" | The address is wrong, or has a typo | Copy it again from your Settings page. It ends in /mcp |
| A tool answers that a line is unusable | The line is overdue, has no owner, or is contested | Not an error. Tell the buyer you are checking, and ask the owner |
To change how it signs in, remove the connector and add it again. Claude does not let you edit sign-in settings after adding one.
What Claude sends us
Only what each tool needs: your search words, the action you describe, and the line you act on. Not your conversation. The check records the action, and the sentence a promise was made in, capped at 1,000 characters. What we hold has the full account.
Claude's own steps are from its page Add a connector that isn't in the directory, read on 20 October 2026. If a label in Claude has changed, that page is the one to trust.