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Formstack API and MCP server

Formstack's Forms API covers forms, fields and submissions, but it needs the API add-on, a token and code you write and host. Sign in to Formstack 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 Formstack.

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

Formstack's own API, a GitHub MCP server and Cotlet compared
What you need Formstack's APIGitHub MCP serverCotlet
Use without the API add-on or code No No Yes, 12 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when Formstack changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 22, 2026. Sources: Formstack blog: Introducing the Formstack Forms 2025 API · Formstack developers: API reference index (llms.txt) · Formstack Help: Formstack API Overview · Formstack Help: Formstack Personal Access Tokens

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

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

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

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

AI agents connect over MCP, scripts call the REST API. Both reach the same 12 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. Formstack 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/formstack with its own method and path, such as PATCH /api/v1/formstack/forms/{form_id}/notifications/{notification_id}/recipients, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the Formstack API and MCP server do?

12 tools on your own Formstack account. Agents call them as operations of the MCP tools formstack_read and formstack_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
Formstack tools in Cotlet's MCP server and REST API
Tool What it does Access
list_forms Forms in your account with ID, name, folder and submission count. read
list_folders Folders and subfolders that hold your forms. read
get_form One form with its fields, availability and number of notification emails. read
list_submissions Submissions of one form with their answers, newest first. read
get_submission One submission with every answer and its integration status. read
get_notification_emails The notification emails of one form with recipients and send options. read
copy_form Copy a form into your own account, optionally under a new name. writeasks first
move_forms_to_folder Move one or more forms into a folder, or into a new one. write
update_submission Change answers on a submission and return the old values. writeasks first
update_notification_recipients Set who receives one notification email of a form. writeasks first
resend_notification Resend the notification email of one submission to chosen addresses. writeasks first
set_form_availability Close a form now, on a date or after a number of submissions, or reopen it. writeasks first

Scroll the table for all 12 tools.

Ask in plain words. Your agent does the rest.

All Formstack use cases

Is it safe to connect Formstack?

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 Formstack 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 Formstack 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 Formstack have an API?

Formstack has a full REST API for Forms, the V2025 API released in August 2025, but it is an add-on and Formstack publishes no MCP server for it (checked 22 Oct 2026). The API covers forms, fields, folders, submissions, notification and confirmation emails and webhooks. You need the Forms API add-on, a Personal Access Token and your own code. Formstack offers an llms.txt file for coding assistants and does not help build custom integrations.

How do I get access?

Sign up free, open Formstack 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 12 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 Formstack yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so Formstack 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: copy_form, update_submission, update_notification_recipients, resend_notification, set_form_availability wait for your OK by default. You can switch that off per tool for scheduled runs.

What can it not do?

No tool builds or edits fields, conditional logic, Email Logic rules, themes or confirmation emails. get_form reads the fields and flags the ones that carry logic, and the notification tools change recipients only. Copying goes to your own account, not to another one. Deleting forms and submissions is left out on purpose. The Forms API does cover fields, logic and confirmation emails if you want them through code.

Should I use a Formstack 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 Formstack 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 Formstack?

No. Cotlet is independent and not affiliated with Formstack.

Give your agent access to Formstack.

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