usefulapiWaiverFile MCP server
Read WaiverFile waivers, events, forms and SMS opt-ins; create and update events, invite managers. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the WaiverFile connector, then ask in plain words. The AI picks the tools.
- Who signed a waiver for tomorrow's events?
- How many waivers were signed last month?
- Find the waiver signed by jane@example.com.
- Create an event 'Saturday kayak tour' on 2026-11-07 from 09:00 to 12:00 UTC.
What you can do with WaiverFile in Claude and ChatGPT
For businesses that collect signed waivers for tours, classes and events with WaiverFile.
See who signed a waiver for an event
The AI lists upcoming events or events in a date range, then reads the waivers of one event: who signed, when, and the participants.
Find a signed waiver by name, email or phone
The AI searches signed waivers by a signer's name, email or phone, or by a booking reference id, and reads one waiver with its form data.
Count or list the waivers of a date range
The AI counts the waivers in a date range, lists them, and reads flat export rows with custom form fields as columns.
Check who opted in to or out of SMS marketing
The AI lists the phone numbers that opted in during a date range, or those that opted out.
Create or update an event
The AI creates an event with name, start and end time, category and waiver forms, or updates one. Updating replaces the whole event, so it reads the event first.
Changes dataInvite managers to an event
The AI invites people by email address to manage one event. WaiverFile sends each of them an email, with your optional message.
Changes dataHow do I connect WaiverFile?
Before you connect
The login page asks for your WaiverFile API key and WaiverFile Site ID.
In WaiverFile open Settings → API → API keys. Click Create a Key if you have none, click Show to reveal the key, and copy the Site ID shown below it. The key gives access to your signers' personal data and can create events; revoke it there at any time. Your key is used only to call the WaiverFile API on your behalf; it is never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name WaiverFile and this URL, then click Add:https://
waiverfile. usefulapi. io/ mcp - Claude opens the login page: enter your WaiverFile API key and WaiverFile Site ID.
- In a chat, click + → Connectors and turn on WaiverFile.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name WaiverFile and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
waiverfile. usefulapi. io/ mcp - ChatGPT opens the login page: enter your WaiverFile API key and WaiverFile Site ID.
- In Plugins, install WaiverFile, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"waiverfile": {
"url": "https://waiverfile.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"waiverfile": {
"type": "http",
"url": "https://waiverfile.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
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 WaiverFile API key and WaiverFile Site ID. 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.
Pricing
| 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 WaiverFile server only. Ask your AI to run waiverfile_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 waiverfile_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 waiverfile_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 21
Show all 21 tools (the AI picks them for you)
Read only · 13
- Get site details
waiverfile_get_siteDetails of the WaiverFile site (WaiverSite) this API key belongs to: name, settings and plan information as WaiverFile reports them. - List waiver forms
waiverfile_list_waiver_formsList the waiver forms of the site (name, id, which fields they collect: email, address, phone, date of birth, minimum age, signature). Active forms by default; set include_deleted for all forms including deleted ones. Use the form ids when creating or updating events. - List events by date range
waiverfile_list_eventsList waiver events (a class, tour, party or session that collects waivers) whose date falls in a range, optionally only one event category. Each event has an id, name, start/end, headcount and spots remaining. Dates are UTC. - List upcoming events
waiverfile_list_upcoming_eventsList upcoming waiver events between two dates (UTC), for example the next 7 days. - List event categories
waiverfile_list_event_categoriesList the event categories of the site (id and name). Use the ids to filter events or to put a new event in a category. - Get waivers for an event
waiverfile_get_event_waiversThe waivers collected for one event: who signed, when, and the participants. Personal data of signers. - Search waivers
waiverfile_search_waiversSearch signed waivers by free-text terms (a signer's name, email or phone). Personal data of signers. - Get a waiver
waiverfile_get_waiverOne signed waiver by id: signer, date signed, participants, collected form data, event and the agreement text. Set lite for only the collected form data (no agreement text or event info). Signature and image bytes are never returned. - Find waivers by reference id
waiverfile_find_waivers_by_referenceFind waivers by the reference ids an outside booking or reservation system attached to them (referenceID1, 2, 3). Give at least one of reference_id_1/2/3, or reference_id_any to match all three fields. - List waivers by date range
waiverfile_list_waiversA page of the waivers signed in a date range. Set lite for only the collected form data (smaller). For a flat export with custom form columns use waiverfile_export_waiver_data; for totals use waiverfile_count_waivers. Personal data of signers. - Export waiver data
waiverfile_export_waiver_dataA page of flat waiver rows for a date range (the data behind the WaiverFile export): standard fields, optionally every custom form field as a column, and participants either as one comma-separated column or one row each. Personal data of signers. - Count waivers in a date range
waiverfile_count_waiversHow many waivers a date range holds: record_count (GetWaiverDataCount, the rows waiverfile_export_waiver_data pages through) and waiver_count (GetAllWaiversByDateRangePageCount, which WaiverFile documents as the number of waivers in the range, used to work out the pages of waiverfile_list_waivers). pages_at_page_size is waiver_count divided by page_size (default 25), rounded up. - List SMS subscribers
waiverfile_list_sms_subscribersSMS marketing subscribers (phone numbers) that opted in during a date range, or with opted_out set the ones that opted out. Dates are UTC. Personal data.
Changes data · 4
- Create an event
waiverfile_create_eventCreate a waiver event (a class, tour or session that collects waivers) with a name and a start/end time (UTC). Optionally an all-day flag, category, location, signing cut-off, participant limit and which waiver forms to attach (default: WaiverFile's own choice, see list_waiver_forms). Not idempotent: calling twice creates two events. Sends no email. - Update an event
waiverfile_update_eventUpdate an existing event. WaiverFile replaces the whole event, so name, start, end and all_day are required and anything left out is reset: category_id empty = no category, waiver_form_ids empty = ALL active forms are attached. Read the event first (waiverfile_list_events) and send its current values for the fields you do not change. Same input twice gives the same result. - Invite event managers
waiverfile_invite_event_managersSENDS EMAIL: invites people (by email address) to manage one event; they can log in to WaiverFile and see its signers and participants, with the fields set in the account settings. WaiverFile emails each address, with your optional message in the body (skip_email_if_account_exists suppresses the email for people who already have an account). Cannot be undone by this server except with the vendor's own remove-managers action. Requires confirm=true after the user approved it. - Create an event category
waiverfile_create_event_categoryCreate an event category (a label to group events). Not idempotent: calling twice with the same name creates two categories.
Your usefulapi plan · 4
- Usage status (free-tier meter)
waiverfile_usage_statusReport the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. - Request a missing feature
waiverfile_request_featureTell usefulapi that the user needs something the WaiverFile tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. - Upgrade to Pro or Pro+
waiverfile_upgradeGet a paid plan for WaiverFile (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
waiverfile_cancel_subscriptionCancel the caller's WaiverFile Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run waiverfile_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with WaiverFile in Claude or ChatGPT?
See who signed a waiver for an event. Find a signed waiver by name, email or phone. Count or list the waivers of a date range. Check who opted in to or out of SMS marketing. Create or update an event. Invite managers to an event. See what you can do for the details.
Is this an official WaiverFile product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by WaiverFile. The server calls the WaiverFile API with your own WaiverFile access, so it sees only the data that your account can see.
Can I connect WaiverFile to Claude or ChatGPT?
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.
What do I need to connect?
The login page asks for your WaiverFile API key and WaiverFile Site ID. See Before you connect for where to find them.
Do I put my WaiverFile key or an Authorization header in the client config?
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 WaiverFile API key and WaiverFile Site ID. 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.
How do you keep my WaiverFile credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the WaiverFile 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 WaiverFile.
Can the AI change my WaiverFile data?
Yes, if you approve it. 4 of the 17 WaiverFile tools can create or change data. The other 13 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
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 WaiverFile server only. Cancel any time: your paid plan then runs to the end of the paid period. Run waiverfile_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run waiverfile_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 waiverfile_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a WaiverFile tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with waiverfile_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.
Which AI clients can I use?
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.