Read Arthur properties, units and tenancies; track maintenance and add tasks or notes. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Arthur Online connector, then ask in plain words. The AI picks the tools.
For property managers using Arthur to track lettings, maintenance and compliance.
List units with vacancy or availability filters, then inspect a selected unit and its linked property. Follow the returned pagination to review the portfolio.
List overdue transactions for the period you choose and inspect selected records to review amounts, dates and payment status.
List certificates and inspect their expiry dates, types and linked properties to identify records that need attention.
Inspect the unit and its existing tasks, then confirm the unit, description and due date before creating a maintenance task.
Changes dataYou sign in with your Arthur Online account and approve the access (OAuth). You do not need an API key.
In Arthur, open Settings → Your Account → OAuth Applications and find the numeric Entity ID in the banner at the top. This server reads properties, units, tenancies, tenants, maintenance, transactions, invoices and certificates. It can create maintenance tasks and task notes when requested; it never deletes records or posts payments. Revoke access in Arthur's OAuth Applications settings.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"arthur-online": {
"url": "https://arthur-online.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"arthur-online": {
"type": "http",
"url": "https://arthur-online.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: you sign in with your Arthur Online account. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper property-management account | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per property-management account | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Arthur Online server only. Ask your AI to run arthur_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with arthur_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with arthur_upgrade before then undoes the cancel. Or write to [email protected].
arthur_list_propertiesarthur_get_propertyarthur_list_unitsarthur_get_unitarthur_list_tenanciesarthur_get_tenancyarthur_list_tenantsarthur_get_tenantarthur_list_tasksarthur_get_taskarthur_list_workordersarthur_get_workorderarthur_list_transactionsarthur_get_transactionarthur_list_invoicesarthur_get_invoicearthur_list_certificatesarthur_get_certificatearthur_create_unit_taskarthur_add_task_notearthur_usage_statusarthur_request_featurearthur_upgradearthur_cancel_subscriptionReview vacant units and upcoming availability. Review overdue rent transactions. Check property certificate expiry dates. Create a maintenance task for a selected unit. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Arthur Online. The server calls the Arthur Online API with your own Arthur Online access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
A Arthur Online account. You sign in to Arthur Online and approve the access. You do not need an API key.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: you sign in with your Arthur Online account. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Arthur Online API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. You can revoke the access in Arthur Online at any time.
Yes, if you approve it. 2 of the 20 Arthur Online tools can create or change data. The other 18 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Arthur Online server only. Cancel any time: your paid plan then runs to the end of the paid period. Run arthur_usage_status to see how many calls you used.
Ask the AI to run arthur_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run arthur_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with arthur_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.