Browse Formstack forms, submissions and webhooks, search responses, and create submissions. Hosted by usefulapi — connect from Claude, ChatGPT, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"formstack": {
"url": "https://formstack.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"formstack": {
"type": "http",
"url": "https://formstack.usefulapi.io/mcp"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see 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.
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.
Turn on the Formstack connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
formstack_list_forms | read | List forms List the forms in the account, with submission counts, live URL and folder. Filter by name or folder and sort. Formstack: GET /forms. |
formstack_get_form | read | Get one form Fetch a form's details — name, URL, submission counts, settings — optionally with its full field list. Formstack: GET /forms/{formId}. |
formstack_list_form_fields | read | List a form's fields List every field on a form — id, label, type, required flag, options and logic. Use this to learn field IDs before searching or creating submissions. Formstack: GET /forms/{formId}/fields. |
formstack_list_form_submissions | read | List a form's submissions List a form's submissions, newest or oldest first, filtered by keyword, date range or specific field values. Set include_data to get the answers. Formstack: GET /forms/{formId}/submissions. |
formstack_count_form_submissions | read | Count a form's submissions Count a form's submissions, with a per-day breakdown over a lookback window of up to 7 days. Formstack: GET /forms/{formId}/submissions/count. |
formstack_search_submissions | read | Search submissions across all forms Full-text search for submissions across every form in the account, e.g. by a person's email or name. Formstack: GET /submissions. |
formstack_get_submission | read | Get one submission Fetch a single submission with every field's label, type, display value and parsed value, plus payment, approval and workflow status. Formstack: GET /submissions/{submissionId}. |
formstack_list_partial_submissions | read | List a form's partial submissions List entries respondents started but did not finish (Save & Resume / abandoned), with the same filters as submissions. Formstack: GET /form/{formId}/partialsubmission. |
formstack_list_folders | read | List folders List the account's form folders and their subfolders. Formstack: GET /folders. |
formstack_get_folder | read | Get one folder Fetch a folder with its parent, permissions and direct subfolders. Formstack: GET /folders/{folderId}. |
formstack_list_webhooks | read | List a form's webhooks List the webhooks that push a form's submissions to external URLs, with their payload settings. Formstack: GET /forms/{formId}/webhooks. |
formstack_list_notification_emails | read | List a form's notification emails List the notification emails that alert your team when a form is submitted — recipients, subject, sender and logic. Formstack: GET /forms/{formId}/notifications. |
formstack_list_confirmation_emails | read | List a form's confirmation emails List the confirmation emails sent to the person who submits a form — sender, subject, message and delay. Formstack: GET /forms/{formId}/confirmations. |
formstack_list_submit_actions | read | List a form's submit actions List what happens after a form is submitted — default processing, a custom message, or a redirect URL — with conditional logic. Formstack: GET /forms/{formId}/submitactions. |
formstack_create_submission | write | Create a submission Submit 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. Formstack: POST /forms/{formId}/submissions. |
formstack_update_submission | write | Update a submission Change field values on an existing submission, or mark it read/unread. Only the fields you pass are changed. Formstack: PUT /submissions/{submissionId}. |
formstack_create_prefill_url | write | Create a prefilled form link Generate 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. Formstack: POST /forms/{formId}/prefill. |
formstack_update_form | write | Update a form's settings Rename 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. Formstack: PUT /forms/{formId}. |
formstack_create_folder | write | Create a folder Create a folder for organising forms, at the root or inside a parent folder. Formstack: POST /folders. |
formstack_create_webhook | write | Create a webhook Add a webhook that POSTs each new submission of a form to your URL. Formstack: POST /forms/{formId}/webhooks. |
formstack_usage_status | Usage status (free-tier meter) Report 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. | |
formstack_request_feature | Request a missing feature Tell 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. | |
formstack_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Formstack (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $19/month or $190/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
formstack_cancel_subscription | Cancel the Pro subscription Cancel 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. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Formstack server only. Subscribe with formstack_upgrade (it returns a Stripe Checkout link). Cancel any time with formstack_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running formstack_upgrade before then undoes the cancel. Or write to [email protected].
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.
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 Formstack Personal Access Token. See Before you connect for where to find it.
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.
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.
Yes, if you approve it. 6 of the 20 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.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Formstack server only. Cancel any time: Pro then runs to the end of the paid period. Run formstack_usage_status to see how many calls you used.
Ask the AI to run formstack_upgrade: it returns a Stripe Checkout link. To cancel, run formstack_cancel_subscription. Pro continues to the end of the paid period.
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.
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.