Your homes, in ChatGPT and Claude.

Connect Lettance to the assistant you already use. It sees every home's certificates, deadlines and repairs, answers with the rule behind it, and records checks and repair updates.

Choose a plan Connect in Settings

Included in both plans, from £9 a month. Works with Claude, ChatGPT, Codex, Cursor, Gemini CLI and more. ChatGPT needs a Business, Enterprise or Edu workspace.

What do I need to sort in the next month?

Used Lettance: What is due

Three things across your homes, soonest first:

Reply to the tenant's report about the boilerFlat 2, 14 Example Street17 Oct 2026
Fix the 2 faults in the electrical reportFlat 2, 14 Example Street24 Oct 2026
Gas safety check by a Gas Safe engineer9 Mill Lane7 Nov 2026

I did the Legionella risk assessment at 9 Mill Lane today. Log it.

Used Lettance: Record a check

Done. It is in 9 Mill Lane's evidence record, dated 15 October 2026, marked as recorded from this assistant.

The same assistant, with your records and the law behind it

A general assistant is good at writing and explaining. Lettance gives it the facts about your homes.

What an assistant can do on its own, and with Lettance connected
Topic	On its own	With Lettance connected
Your homes	Knows nothing about them unless you paste the details into every chat.	Sees every home, tenancy, certificate and open repair you keep in Lettance.
The law	Answers from what it learned in training, which can be out of date.	Answers from 77 rules, each linked to legislation.gov.uk or GOV.UK, and we watch those sources for changes.
Council licensing	Cannot tell which licensing scheme covers a particular street.	Knows the schemes ward by ward for 170 of 296 English councils, from each council's own pages.
Certificates	Reads a file you upload to that chat, then forgets it.	Uses what Lettance read from each certificate: the dates, the faults and what counts.
Notices	Works the dates out from scratch each time you ask.	Gives rent increase (Form 4A) and possession notice (Form 3A) dates, worked out the same way as your notice.
Records	Keeps nothing once the chat ends.	Records the Legionella, furniture and HMO checks you did, and repair updates, in each home's evidence record.

Your homes: On its own: Knows nothing about them unless you paste the details into every chat.; With Lettance: Sees every home, tenancy, certificate and open repair you keep in Lettance.
The law: On its own: Answers from what it learned in training, which can be out of date.; With Lettance: Answers from 77 rules, each linked to legislation.gov.uk or GOV.UK, and we watch those sources for changes.
Council licensing: On its own: Cannot tell which licensing scheme covers a particular street.; With Lettance: Knows the schemes ward by ward for 170 of 296 English councils, from each council's own pages.
Certificates: On its own: Reads a file you upload to that chat, then forgets it.; With Lettance: Uses what Lettance read from each certificate: the dates, the faults and what counts.
Notices: On its own: Works the dates out from scratch each time you ask.; With Lettance: Gives rent increase (Form 4A) and possession notice (Form 3A) dates, worked out the same way as your notice.
Records: On its own: Keeps nothing once the chat ends.; With Lettance: Records the Legionella, furniture and HMO checks you did, and repair updates, in each home's evidence record.

Ask it in your own words

Your assistant picks the right Lettance tool. A few things landlords ask:

“What is due across my homes before Christmas?”
Every dated check, soonest first, with anything overdue.
“Which home should I deal with first?”
Your homes in the order the dashboard uses: emergencies, then urgent repairs, then overdue checks.
“Is the electrical report for Flat 2 all right?”
What Lettance read from it: its dates, each fault it found and whether it counts.
“When can the new rent start at 9 Mill Lane?”
The earliest date for a Form 4A rent increase, with the rule that decides it.
“The boiler at Flat 2 is booked for Thursday. Note it.”
A repair update in that home's evidence record. Your assistant never contacts the tenant.
“I did the Legionella risk assessment today. Log it.”
The date added to the evidence record, marked as recorded from your assistant.

You stay in control

You sign in and choose what your assistant can do. It only sees your own homes.

You choose what it can do
Read only, or read and record changes. You pick when you connect, and you can disconnect it in Settings at any time.
Every change is marked
Anything your assistant records goes into the home's evidence record under the app's name, so you can always see where it came from.
It never contacts your tenants
Your assistant can record a repair update. Sending anything to a tenant stays in Lettance, where you decide.
Some things stay in Lettance
Your assistant never sees the certificate files themselves or your tenants' contact details.

Connect in about 2 minutes

Add Lettance as a connector, then sign in when your assistant asks. Tools that cannot sign in use a token from Settings instead.

In Claude, open Customize, then Connectors, and choose Add custom connector.
Paste the address below and add the connector. Keep Claude's recommended sign-in settings.
Choose Connect. Sign in to Lettance and choose what Claude can do.
On a Team or Enterprise plan, an owner adds the connector in Organization settings first.

Connector address

https://lettance.com/mcp/account

Every Claude plan can add custom connectors. The Free plan can add one.

Read the Claude guide

To sign in with your Lettance account, add the server, then run /mcp in Claude Code and choose lettance.
Or use a token: set LETTANCE_TOKEN in your shell, then add the server with the header.

claude mcp add --transport http lettance https://lettance.com/mcp/account

Use a token

claude mcp add --transport http lettance https://lettance.com/mcp/account --header "Authorization: Bearer $LETTANCE_TOKEN"

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the Claude Code guide

In ChatGPT on the web, open Plugins, choose +, then Add custom MCP server.
Name it Lettance, paste the address below and choose OAuth for authentication.
Tick I understand and want to continue, then choose Create as a plugin. Install it, sign in to Lettance and choose what ChatGPT can do.
ChatGPT cannot use tokens, so it always signs in this way.

Server address

https://lettance.com/mcp/account

ChatGPT lets Business, Enterprise and Edu workspaces add custom servers, and on Business only an admin or owner can. Other ChatGPT plans cannot add them yet.

Read the ChatGPT guide

Add this to ~/.codex/config.toml and set LETTANCE_TOKEN in your shell. Codex adds "Bearer" itself.
Or leave out bearer_token_env_var and run codex mcp login lettance to sign in with your Lettance account.

~/.codex/config.toml

[mcp_servers.lettance]
url = "https://lettance.com/mcp/account"
bearer_token_env_var = "LETTANCE_TOKEN"

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the OpenAI Codex CLI guide

Set LETTANCE_TOKEN in your shell, then run this. Gemini saves the server in settings.json.
Or leave out --header, then run /mcp auth lettance in Gemini CLI to sign in with your Lettance account.

Terminal

gemini mcp add --transport http --header "Authorization: Bearer $LETTANCE_TOKEN" lettance https://lettance.com/mcp/account

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the Gemini CLI guide

Add this to ~/.cursor/mcp.json (or .cursor/mcp.json in a project) and set LETTANCE_TOKEN in your environment.
Or leave out headers, and Cursor asks you to sign in with your Lettance account.

~/.cursor/mcp.json

{
  "mcpServers": {
    "lettance": {
      "url": "https://lettance.com/mcp/account",
      "headers": {
        "Authorization": "Bearer ${env:LETTANCE_TOKEN}"
      }
    }
  }
}

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the Cursor guide

Add this to .vscode/mcp.json, or run MCP: Open User Configuration. VS Code asks for the token once and stores it securely.
Or leave out inputs and headers, and VS Code asks you to sign in with your Lettance account.

.vscode/mcp.json

{
  "inputs": [
    {
      "type": "promptString",
      "id": "lettance-token",
      "description": "Lettance personal access token",
      "password": true
    }
  ],
  "servers": {
    "lettance": {
      "type": "http",
      "url": "https://lettance.com/mcp/account",
      "headers": {
        "Authorization": "Bearer ${input:lettance-token}"
      }
    }
  }
}

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the VS Code guide

Give Grok the server as a remote MCP tool in the Responses API. Set LETTANCE_TOKEN and XAI_API_KEY in your shell first.
Grok sends the token on each call to Lettance. Use a read-only token unless it needs to record changes.

Terminal

curl https://api.x.ai/v1/responses \
  -H "Authorization: Bearer $XAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<EOF
{
  "model": "grok-4.7",
  "input": "What is due across my homes in the next 60 days?",
  "tools": [{
    "type": "mcp",
    "server_url": "https://lettance.com/mcp/account",
    "server_label": "lettance",
    "authorization": "$LETTANCE_TOKEN"
  }]
}
EOF

Create a token in Settings, under AI tools. It is shown once and you can revoke it.

Read the Grok guide

No assistant? Lettance has its own

Every home in Lettance has an assistant built in, with the same records and rules. The Monday email and a calendar feed tell you what is due without asking.

See what is included How we use AI

Questions

Do I need a paid plan?

Yes. Connecting your own homes is part of both plans, from £9 a month. The public rules and council licensing tools are free for anyone, with no account.

Does it use my Lettance assistant allowance?

No. Questions you ask from ChatGPT, Claude or another tool run on that tool, so they do not count towards the monthly assistant allowance in Lettance. Your AI provider may charge for its own plan.

Which ChatGPT plans can connect?

Today ChatGPT lets Business, Enterprise and Edu workspaces add custom connections like this one, and on Business an admin or owner adds it. Other ChatGPT plans cannot add them yet. Claude works on every plan, including Free.

What does my AI provider see?

What your assistant asks for: your homes' addresses, checklists, dates, what we read from documents and repair reports. Never the document files or your tenants' contact details. The provider handles it under its own terms, which you can read in its privacy settings.

Can it make mistakes?

Yes. The dates, checklists and rule links come from Lettance, so they are the same as in the app. Your assistant writes the reply around them, so check its wording against the linked rule before you act on anything important.

What if I stop paying?

Connected tools stop working, and your records stay readable in Lettance.

Building something of your own? The public rules and licensing tools are free, with no account. Read the developer docs.

Your homes, in ChatGPT and Claude.

The same assistant, with your records and the law behind it

Ask it in your own words

You stay in control

You choose what it can do

Every change is marked

It never contacts your tenants

Some things stay in Lettance

Connect in about 2 minutes

No assistant? Lettance has its own

Questions