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Fillout API and MCP server

Fillout has no API for creating or editing forms, questions, logic or form settings. Sign in to Fillout once in your own Cloud Browser, and your AI agent does the work there for you. The same tools work over MCP for agents and as a REST API for scripts.

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Not affiliated with Fillout.

Fillout has no API for this. So we run one for you.

Fillout's own API, a GitHub MCP server and Cotlet compared
What you need Fillout's APIGitHub MCP serverCotlet
Forms, questions, logic, form settings No Partly Yes, 15 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when Fillout changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 17, 2026. Sources: Fillout Help: Fillout REST API · Fillout Help: Create submissions (API reference) · Fillout Help: Build forms with Form Agent · Zite Help: Zite MCP overview

Your own Cloud Browser, on 24/7. Sign in once. We keep it connected.

  1. 01Sign in to Fillout in your own Cloud Browser

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

How do I connect Fillout to Claude, ChatGPT or my code?

AI agents connect over MCP, scripts call the REST API. Both reach the same 15 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. Fillout and every other app you connect show up as its tools.

  • Claude
  • ChatGPT
  • OpenClaw
  • Hermes
  • GrokBot
  • Cursor
  • n8n
  • Any MCP client
  1. 1

    Add Cotlet to your agent

    Claude Code
    claude mcp add --transport http cotlet \
  https://cotlet.dev/mcp/v1 \
  --header "Authorization: Bearer $COTLET_API_KEY"
    Cursor
    {
  "mcpServers": {
    "cotlet": {
      "url": "https://cotlet.dev/mcp/v1",
      "headers": {
        "Authorization": "Bearer ${COTLET_API_KEY}"
      }
    }
  }
}
    Codex
    # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY"

    Paste the snippet for your client. The same server and key serve every app you connect, so you do this once.

For scripts: REST API

Every tool is an endpoint under /api/v1/fillout with its own method and path, such as PATCH /api/v1/fillout/forms/{form_id}/access, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the Fillout API and MCP server do?

15 tools on your own Fillout account. Agents call them as operations of the MCP tools fillout_read and fillout_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
Fillout tools in Cotlet's MCP server and REST API
Tool What it does Access
list_forms Forms in your Fillout account with their IDs and names. read
get_form A form's questions with ID and field type, plus calculations and URL parameters. read
get_form_logic Show and hide rules on questions and the branches between pages. read
list_submissions Submissions of a form with their answers, filtered by date, status or text. read
get_submission One submission with all its answers, calculations and URL parameters. read
get_form_settings Access settings and email notifications of a form. read
create_form Create a new form with a name and its questions, not yet published. write
add_question Add one question of any field type to a form. write
update_question Change a question's label, type, options or whether it is required. write
set_question_logic Hide a question when conditions are met, or always. write
set_page_branch Route respondents from one page to another when a condition is met. write
update_form_access Close a form, set open and expiration dates, a submission limit or a closed message. writeasks first
set_email_notifications Turn self-email notifications on a form on or off and set who gets them. writeasks first
publish_form Publish a form so respondents can fill it in, with every change made since the last publish. writeasks first
delete_submission Delete one submission permanently, with its uploaded files. writeasks first

Scroll the table for all 15 tools.

Ask in plain words. Your agent does the rest.

All Fillout use cases

Is it safe to connect Fillout?

You sign in yourself in your own Cloud Browser, we never save your password, and anything that reaches your readers waits for your OK. The browser profile is encrypted in the EU. Independent scanners grade cotlet.dev A+.

Security overview

How much do the Fillout API and MCP server cost?

One price for both: a tool call costs the same over MCP or REST. Free 7-day trial with 2,000 credits, no card needed. Then one-time credit packs, no subscription, valid 12 months. Most calls use 25 credits, and your Cloud Browser uses 50 credits a day while Fillout is enabled for agents, so 20 calls a day come to 550 credits.

See full pricing
Cotlet credit packs: price, credits and calls at 25 credits each
Credits Price, one time Calls at 25 credits Per 1,000 credits
5,000 $29 200 $5.80
15,000 $79 600 $5.27
32,000 $149 1,280 $4.66
60,000 $249 2,400 $4.15

Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.

Questions

Does Fillout have an API?

Fillout has a REST API that lists forms, reads a form's questions and its submissions, creates and deletes submissions and manages webhooks, but it cannot create or edit forms, and Fillout documents no MCP server for the form builder (checked 17 Oct 2026). Zite, Fillout's sister product, has an MCP server that can view the Fillout forms in a workspace, and its docs say creating forms is not supported over MCP.

How do I get access?

Sign up free, open Fillout under Integrations in the console and press Request access. Your free trial starts with your account, no card needed.

Is the MCP server different from the API?

No, only the way in. Cotlet builds each integration as a REST API and puts an MCP server on top, so both have the same 15 tools, the same inputs and answers, one API key and one price. AI agents such as Claude, ChatGPT or Cursor use MCP; scripts, cron jobs and HTTP steps in n8n, Make or Zapier use the REST API.

What is the Cloud Browser?

Your own Chrome that Cotlet runs for you in the EU, around the clock. You open it from the console, sign in to Fillout yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so Fillout sees the browser you signed in with. Password saving is off and the profile is stored encrypted with AES-256-GCM.

Can my agent act without asking me?

Not on anything that reaches other people: update_form_access, set_email_notifications, publish_form, delete_submission wait for your OK by default. You can switch that off per tool for scheduled runs.

Do I need an API key or a paid Fillout plan?

No API key. Cotlet works in your signed-in Fillout account, so the key from Developer settings is not used. Fillout's help pages do not state which plan the REST API needs. What your agent can do follows your role: a Member edits only their own forms, and an Admin has full access to the workspace.

Can my agent edit a form while a teammate has it open?

Fillout says collaborators cannot edit the same form at the same time, but can edit different forms at once. Ask your agent to work on forms nobody has open, or on a duplicate.

Should I use a Fillout MCP server from GitHub instead?

Pick one if you want the code on your own computer and do not mind the upkeep: you install it, sign it in and fix it when Fillout changes. Pick Cotlet if you want it hosted and kept working for you.

Can I use it in n8n, Make or Zapier?

Yes. Add https://cotlet.dev/mcp/v1 in n8n's MCP Client node, or call the REST endpoints from an HTTP step in Make or Zapier.

Who runs Cotlet?

Cotlet is run by Take Group, a Polish software company working since 2019. Take Group runs about 3,200 websites on its own systems and has its own DevOps team for infrastructure security. We built and used integrations like this inside the company for years before opening them as Cotlet.

Is Cotlet affiliated with Fillout?

No. Cotlet is independent and not affiliated with Fillout.

Give your agent access to Fillout.

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