Read appointments, types, calendars and availability; create, cancel or reschedule bookings. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Acuity Scheduling connector, then ask in plain words. The AI picks the tools.
For service businesses and their staff who take bookings with Acuity Scheduling.
The AI checks which dates in a month have availability and lists the open time slots on a day for one appointment type. You get the next open slots without opening the calendar.
The AI lists appointments with filters and can open a single appointment. It groups them by calendar or client and shows time, type and who booked.
The AI finds an open slot, checks the client list for the person, creates the client if needed and books the appointment. Acuity may send the confirmation email.
Changes dataThe AI finds the appointment by client and date, then moves it to a new time or cancels it. Acuity may send an update or cancellation email to the client.
Changes dataThe AI lists the group class time slots in a month for class-type appointment types. You see which classes are scheduled and when.
The login page asks for your Acuity User ID and API Key.
Find both in Acuity → Integrations → API (your User ID and API Key are shown there). Your credentials are used only to call the API on your behalf and to derive a private account id; they are never shown to anyone.
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": {
"acuity-scheduling": {
"url": "https://acuity-scheduling.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"acuity-scheduling": {
"type": "http",
"url": "https://acuity-scheduling.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: the login page asks for your Acuity User ID and API Key. 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.
ChatGPT or Claude can read your Acuity Scheduling appointments, find free time slots for a service, and reschedule a booking when you ask.
23 August 2026| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Acuity Scheduling server only. Ask your AI to run acuity_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 acuity_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 acuity_upgrade before then undoes the cancel. Or write to [email protected].
acuity_list_appointmentsacuity_get_appointmentacuity_list_appointment_typesacuity_list_calendarsacuity_availability_datesacuity_availability_timesacuity_availability_classesacuity_list_clientsacuity_list_formsacuity_list_productsacuity_list_ordersacuity_list_blocksacuity_list_labelsacuity_get_meacuity_create_appointmentacuity_cancel_appointmentacuity_reschedule_appointmentacuity_create_clientacuity_usage_statusacuity_request_featureacuity_upgradeacuity_cancel_subscriptionFind open times for an appointment type. Review the appointments for a day or week. Book a client, and add them if new. Reschedule or cancel an appointment. See which group classes have space. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Acuity Scheduling. The server calls the Acuity Scheduling API with your own Acuity Scheduling 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.
The login page asks for your Acuity User ID and API Key. See Before you connect for where to find them.
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: the login page asks for your Acuity User ID and API Key. 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 Acuity Scheduling 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. To stop all access, remove the connector and change or delete these credentials in Acuity Scheduling.
Yes, if you approve it. 4 of the 18 Acuity Scheduling tools can create or change data. The other 14 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 Acuity Scheduling server only. Cancel any time: your paid plan then runs to the end of the paid period. Run acuity_usage_status to see how many calls you used.
Ask the AI to run acuity_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 acuity_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 acuity_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.