usefulapiFillout MCP server
Read Fillout forms and submissions, export responses, and create submissions and webhooks. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Fillout connector, then ask in plain words. The AI picks the tools.
- How many responses did my customer survey form get last month?
- Show the latest 10 submissions on my contact form.
- Which forms do I have in my account, and what questions does each one ask?
- Export all responses from my event signup form.
What you can do with Fillout in Claude and ChatGPT
For teams who collect responses with Fillout forms, such as surveys, contact and signup forms.
List your forms and the questions they ask
The AI lists the forms in the account and opens one to read every question with its id, name and type, plus calculations and quiz settings.
Count responses in a date range
The AI counts a form's submissions by date range, status or search text, without pulling the answers. It also counts partial submissions.
Read the latest submissions
The AI lists a form's submissions with the answers, filtered by date range, status or search text, and opens one submission in full.
Export responses of a form and sum them up
The AI fetches many submissions in one call, up to a maximum you set, and summarizes the answers. The result says if the export stopped at that maximum.
Import responses or manage a submission webhook
The AI creates up to 10 submissions on a form from answers you collected elsewhere. It can also add or remove a webhook that receives new submissions.
Changes dataHow do I connect Fillout?
Before you connect
The login page asks for your Fillout API key and Region.
Create a key in Fillout → Settings → Developer (available on every plan, including Free). Pick EU only if your account is hosted on Fillout's EU agent. Your key 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 Fillout and this URL, then click Add:https://
fillout. usefulapi. io/ mcp - Claude opens the login page: enter your Fillout API key and Region.
- In a chat, click + → Connectors and turn on Fillout.
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 Fillout and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
fillout. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Fillout API key and Region.
- In Plugins, install Fillout, 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": {
"fillout": {
"url": "https://fillout.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"fillout": {
"type": "http",
"url": "https://fillout.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 Fillout API key and Region. 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 Fillout server only. Ask your AI to run fillout_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 fillout_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 fillout_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 13
Show all 13 tools (the AI picks them for you)
Read only · 6
- List forms
fillout_list_formsList every form in the Fillout account — each form's name and formId. Start here to find the formId the other tools need. - Get form questions and metadata
fillout_get_formFetch one form's metadata: every question (id, name, type), calculations, URL parameters, scheduling and payment fields, and quiz settings. Use the question ids to read answers or to create submissions. - List submissions
fillout_list_submissionsList one page of a form's submissions (answers to every question, calculations, URL parameters, scheduling, payments, quiz score, login email), filtered by date range, status or free-text search. Offset pagination: the response carries totalResponses and pageCount. - Get one submission
fillout_get_submissionFetch a single submission by id, with every answer. - Count submissions
fillout_count_submissionsCount a form's submissions matching the same filters as fillout_list_submissions (date range, status, search) without pulling the answers — e.g. 'how many responses this week?' or 'how many partial submissions?'. Reads totalResponses from GET /forms/{formId}/submissions with limit=1. - Export submissions
fillout_export_submissionsFetch many submissions in one call by walking the offset pagination (150 per page, paced under Fillout's 5 requests/second limit), up to max_submissions. Same filters as fillout_list_submissions. Use this for analysis across a whole response set; the result says whether it was truncated. Fillout: GET /forms/{formId}/submissions (repeated).
Changes data · 3
- Create submissions
fillout_create_submissionsCreate up to 10 new submissions on a form, as if respondents had filled it in — e.g. to import responses collected elsewhere. Each submission needs its question answers (question ids from fillout_get_form); URL parameters, scheduling, payments, login email and timestamps are optional. Creates real records that trigger the form's integrations. - Create a submission webhook
fillout_create_webhookSubscribe a URL to a form's new submissions: Fillout will POST each submission (same shape as a fillout_list_submissions entry) to it. Returns the webhook id — keep it, it is the only handle for removing the webhook later. - Remove a submission webhook
fillout_remove_webhookStop a webhook from receiving submissions. Recoverable: create it again with fillout_create_webhook (it gets a new id).
Your usefulapi plan · 4
- Usage status (free-tier meter)
fillout_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
fillout_request_featureTell usefulapi that the user needs something the Fillout 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+
fillout_upgradeGet a paid plan for Fillout (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
fillout_cancel_subscriptionCancel the caller's Fillout 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 fillout_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Fillout in Claude or ChatGPT?
List your forms and the questions they ask. Count responses in a date range. Read the latest submissions. Export responses of a form and sum them up. Import responses or manage a submission webhook. See what you can do for the details.
Is this an official Fillout product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Fillout. The server calls the Fillout API with your own Fillout access, so it sees only the data that your account can see.
Can I connect Fillout 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 Fillout API key and Region. See Before you connect for where to find them.
Do I put my Fillout 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 Fillout API key and Region. 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 Fillout credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Fillout 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 Fillout.
Can the AI change my Fillout data?
Yes, if you approve it. 3 of the 9 Fillout tools can create or change data. The other 6 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 Fillout server only. Cancel any time: your paid plan then runs to the end of the paid period. Run fillout_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run fillout_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 fillout_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Fillout tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with fillout_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.