usefulapiFormstack MCP server
Browse Formstack forms, submissions and webhooks, search responses, and create submissions. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Formstack connector, then ask in plain words. The AI picks the tools.
- How many responses did my contact form get in the last 7 days?
- Show me the latest submissions on my customer survey form.
- Which people started my application form but never finished it?
- Find every submission that mentions Jane Smith across all my forms.
What you can do with Formstack in Claude and ChatGPT
For teams who collect responses with Formstack forms.
Count responses to a form by day
The AI lists forms with their submission counts and counts one form's submissions with a per-day breakdown over a window of up to 7 days.
Read the latest submissions of a form
The AI lists a form's submissions filtered by keyword, date range or field values, with the answers. It sums up what people wrote.
Find everything a person submitted
The AI runs a full-text search across all forms, for example by an email or name, and opens each submission.
Find people who did not finish a form
The AI lists the partial submissions of a form, the entries that were started but not finished.
Correct a submission or create a prefilled link
The AI changes field values on an existing submission, or creates a link to a form with some fields filled in for a customer.
Changes dataHow do I connect Formstack?
Before you connect
The login page asks for your Formstack Personal Access Token.
Create one in Formstack → your account menu → API → Personal Access Tokens (it starts with fs_pat_). It acts as your Formstack user and follows that user's permissions; API access requires a paid Formstack plan. Your token is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Formstack and this URL, then click Add:https://
formstack. usefulapi. io/ mcp - Claude opens the login page: enter your Formstack Personal Access Token.
- In a chat, click + → Connectors and turn on Formstack.
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 Formstack and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
formstack. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Formstack Personal Access Token.
- In Plugins, install Formstack, 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": {
"formstack": {
"url": "https://formstack.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"formstack": {
"type": "http",
"url": "https://formstack.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 Formstack Personal Access Token. 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 Formstack server only. Ask your AI to run formstack_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 formstack_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 formstack_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 25
Show all 25 tools (the AI picks them for you)
Read only · 14
- List forms
formstack_list_formsList the forms in the account, with submission counts, live URL and folder. Filter by name or folder and sort. - Get one form
formstack_get_formFetch a form's details — name, URL, submission counts, settings — optionally with its full field list. - List a form's fields
formstack_list_form_fieldsList every field on a form — id, label, type, required flag, options and logic. Use this to learn field IDs before searching or creating submissions. - List a form's submissions
formstack_list_form_submissionsList a form's submissions, newest or oldest first, filtered by keyword, date range or specific field values. Set include_data to get the answers. - Count a form's submissions
formstack_count_form_submissionsCount a form's submissions, with a per-day breakdown over a lookback window of up to 7 days. - Search submissions across all forms
formstack_search_submissionsFull-text search for submissions across every form in the account, e.g. by a person's email or name. - Get one submission
formstack_get_submissionFetch a single submission with every field's label, type, display value and parsed value, plus payment, approval and workflow status. - List a form's partial submissions
formstack_list_partial_submissionsList entries respondents started but did not finish (Save & Resume / abandoned), with the same filters as submissions. - List folders
formstack_list_foldersList the account's form folders and their subfolders. - Get one folder
formstack_get_folderFetch a folder with its parent, permissions and direct subfolders. - List a form's webhooks
formstack_list_webhooksList the webhooks that push a form's submissions to external URLs, with their payload settings. - List a form's notification emails
formstack_list_notification_emailsList the notification emails that alert your team when a form is submitted — recipients, subject, sender and logic. - List a form's confirmation emails
formstack_list_confirmation_emailsList the confirmation emails sent to the person who submits a form — sender, subject, message and delay. - List a form's submit actions
formstack_list_submit_actionsList what happens after a form is submitted — default processing, a custom message, or a redirect URL — with conditional logic.
Changes data · 7
- Preview or delete one submission
formstack_delete_submissionPermanently delete ONE submission and all associated data. First call with submission_id and its expected form_id to preview. Show the preview to the user and obtain their explicit confirmation, then call the SAME ids with confirm:true and the returned preview_token within 15 minutes. Changed records require a new preview. No bulk deletion, automatic replay or undo. A final read verifies absence; if unverified, inspect the submission before retrying. Formstack: GET, DELETE /submissions/{submissionId}. - Create a submission
formstack_create_submissionSubmit an entry to a form on someone's behalf. This is a real submission: it counts toward the form and can fire its notification emails, webhooks and integrations. - Update a submission
formstack_update_submissionChange field values on an existing submission, or mark it read/unread. Only the fields you pass are changed. - Create a prefilled form link
formstack_create_prefill_urlGenerate a link to a live form with some fields already filled in — e.g. to send a customer a form with their name and account number pre-entered. Formstack stores the prefill and returns prefilledUrl. - Update a form's settings
formstack_update_formRename a form, move it to a folder, change its submit-button text, timezone or language, or activate/deactivate it (with a message shown while inactive). Reversible. - Create a folder
formstack_create_folderCreate a folder for organising forms, at the root or inside a parent folder. - Create a webhook
formstack_create_webhookAdd a webhook that POSTs each new submission of a form to your URL.
Your usefulapi plan · 4
- Usage status (free-tier meter)
formstack_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
formstack_request_featureTell usefulapi that the user needs something the Formstack 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+
formstack_upgradeGet a paid plan for Formstack (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
formstack_cancel_subscriptionCancel the caller's Formstack 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 formstack_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Formstack in Claude or ChatGPT?
Count responses to a form by day. Read the latest submissions of a form. Find everything a person submitted. Find people who did not finish a form. Correct a submission or create a prefilled link. See what you can do for the details.
Is this an official Formstack product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Formstack. The server calls the Formstack API with your own Formstack access, so it sees only the data that your account can see.
Can I connect Formstack 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 Formstack Personal Access Token. See Before you connect for where to find it.
Do I put my Formstack 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 Formstack Personal Access Token. 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 Formstack credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Formstack 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 Formstack.
Can the AI change my Formstack data?
Yes, if you approve it. 7 of the 21 Formstack 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.
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 Formstack server only. Cancel any time: your paid plan then runs to the end of the paid period. Run formstack_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run formstack_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 formstack_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Formstack tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with formstack_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.