Formstack

Form builder: forms, fields, submissions, and new submission triggers

Formstack API referenceAPI checked August 17, 2026

Signs in with: API token
Runs on: Cloud or On-Prem Worker
Operations: 90
Ready-made triggers: 0

Connect Formstack

In Neblex open Connect › Connections and click New Connection.
Search for Formstack and give the connection a clear name.
Fill in the fields. Secret values are encrypted and never shown again.
Click Test, then Create Connection.

Field	What to enter
Formstack personal access tokenRequiredSecret	Personal Access Token prefixed fs_pat_Example: `fs_pat_…`

Use it in a flow

Open a flow, open the node library and search for Formstack.
Drag it onto the canvas and choose an Operation and your connection.
Map the operation's fields from earlier steps, or click Map with Matt.
Use Test this step to see what it returns, then save.

To start a flow from Formstack without a ready-made trigger: a Poll for changes trigger can check one of its list operations on a schedule and pass on only what is new; if Formstack can send webhooks, a Webhook trigger receives them at its own URL.

Operations

90 operations in 14 groups. Each one is a step you can add to a flow.

Confirmation Emails5

Create a new confirmation email for a form`createConfirmationEmail`	POST	Create a new confirmation email for a form
Delete a specific confirmation email`deleteConfirmationEmail`	DELETE	Delete a specific confirmation email
Retrieve all confirmation emails associated with a form`getFormConfirmationEmails`	GET	Retrieve all confirmation emails associated with a form
Retrieve detailed information for a specific confirmation email`getConfirmation`	GET	Retrieve detailed information for a specific confirmation email
Update an existing confirmation email`updateConfirmationEmail`	PUT	Update an existing confirmation email

Fields5

Create a new field within the specified form`createFieldInForm`	POST	Create a new field within the specified form
Permanently delete a field from the specified form`deleteField`	DELETE	Permanently delete a field from the specified form
Retrieve all fields from a form`listFields`	GET	Retrieve all fields from a form
Retrieve detailed information about a specific field`getFieldDetails`	GET	Retrieve detailed information about a specific field
Update an existing field within the specified form`editField`	PUT	Update an existing field within the specified form

Folders5

Create a new folder`createFolder`	POST	Create a new folder
Delete the specified folder.`deleteFolder`	DELETE	Delete the specified folder.
Get all folders on your account and their subfolders.`listFolders`	GET	Get all folders on your account and their subfolders.
Get details for the specified folder or subfolder.`getFolder`	GET	Get details for the specified folder or subfolder.
Update the specified folder.`editFolder`	PUT	Update the specified folder.

Forms8

Create a copy of an existing form with optional configurations`copyForm`	POST	Create a copy of an existing form with optional configurations
Create a new form with optional fields`createForm`	POST	Create a new form with optional fields
Generate a prefilled form URL with specified field values`createFormPrefill`	POST	Generate a prefilled form URL with specified field values
Retrieve a paginated list of forms with optional filtering and sorting`listForms`	GET	Retrieve a paginated list of forms with optional filtering and sorting
Retrieve detailed information about a specific form`getForm`	GET	Retrieve detailed information about a specific form
Retrieve HTML markup for a specific form`getFormHtml`	GET	Retrieve HTML markup for a specific form
Soft delete a form (mark as deleted)`deleteForm`	DELETE	Soft delete a form (mark as deleted)
Update an existing form's properties`editForm`	PUT	Update an existing form's properties

Notification Emails5

Create a form notification email`createNotificationEmail`	POST	Create a form notification email
Delete a notification email`deleteNotificationEmail`	DELETE	Delete a notification email
Get details for the specified notification email`getNotification`	GET	Get details for the specified notification email
Get notification emails for a form`getFormNotificationEmails`	GET	Get notification emails for a form
Update a notification email`updateNotificationEmail`	PUT	Update a notification email

PartialSubmissions3

Delete a partial submission`deletePartialSubmission`	DELETE	Delete a partial submission
Get a list of partial submissions for a form`getPartialSubmissionsList`	GET	Get a list of partial submissions for a form
Get detailed information about a partial submission`getPartialSubmissionDetails`	GET	Get detailed information about a partial submission

Portals13

Create the portal avatar`createPortalAvatar`	POST	Create the portal avatar
Create the portal copy`createPortalCopy`	POST	Create the portal copy
Create the portal form.`createPortalForm`	POST	Create the portal form.
Create the portal user`createPortalUser`	POST	Create the portal user
Delete a form from the portal.`deletePortalForm`	DELETE	Delete a form from the portal.
Delete the portal avatar.`deletePortalAvatar`	DELETE	Delete the portal avatar.
Edit the portal`editPortal`	PUT	Edit the portal
Edit the portal form`editPortalForm`	PUT	Edit the portal form
Edit the portal user`editPortalUser`	PUT	Edit the portal user
Permanently delete a specific portal.`deletePortal`	DELETE	Permanently delete a specific portal.
Remove a user from the portal.`deletePortalUser`	DELETE	Remove a user from the portal.
Retrieve a list of all portals associated with your account.`listPortals`	GET	Retrieve a list of all portals associated with your account.
Retrieve detailed information for a specific portal, including associated forms and users.`getPortal`	GET	Retrieve detailed information for a specific portal, including associated forms and users.

Smart List5

createSmartList`createSmartList`	POST	createSmartList
deleteSmartList`deleteSmartList`	DELETE	deleteSmartList
getSmartList`getSmartList`	GET	getSmartList
listSmartLists`listSmartLists`	GET	listSmartLists
updateSmartList`updateSmartList`	PUT	updateSmartList

Smart List Options9

createBulkSmartListOptions`createBulkSmartListOptions`	POST	createBulkSmartListOptions
createSmartListOption`createSmartListOption`	POST	createSmartListOption
deleteAllSmartListOptions`deleteAllSmartListOptions`	DELETE	deleteAllSmartListOptions
deleteSmartListOption`deleteSmartListOption`	DELETE	deleteSmartListOption
deleteSmartListOptionImage`deleteSmartListOptionImage`	DELETE	deleteSmartListOptionImage
getSmartListOption`getSmartListOption`	GET	getSmartListOption
listSmartListOptions`listSmartListOptions`	GET	listSmartListOptions
updateSmartListOption`updateSmartListOption`	PUT	updateSmartListOption
uploadSmartListOptionImage`uploadSmartListOptionImage`	POST	uploadSmartListOptionImage

Subaccounts7

Assign a theme to a specific form in the subaccount`assignThemeToSubaccountForm`	PUT	Assign a theme to a specific form in the subaccount
Copies a form from the current account to a specified subaccount`subaccountCopyForm`	POST	Copies a form from the current account to a specified subaccount
Copies a theme from the current account to a specified subaccount`copyThemeToSubaccount`	POST	Copies a theme from the current account to a specified subaccount
Delete a theme from the specified subaccount. Forms using this theme will be switched to the default theme.`deleteSubaccountTheme`	DELETE	Delete a theme from the specified subaccount.
Get a paginated list of forms using the specified theme in the subaccount`getSubaccountThemeFormList`	GET	Get a paginated list of forms using the specified theme in the subaccount
Get a paginated list of themes available in the specified subaccount`getSubaccountThemes`	GET	Get a paginated list of themes available in the specified subaccount
Retrieves a list of all subaccounts associated with the current account`listSubaccounts`	GET	Retrieves a list of all subaccounts associated with the current account

Submissions9

Counting form submissions`countFormSubmissions`	GET	Counting form submissions
Create a new submission for the specified form`createSubmission`	POST	Create a new submission for the specified form
Generate presigned S3 upload URLs for a file field. Upload each file directly to its returned `uploadUrl` with an HTTP PUT (bypassing the request-body size limit), then submit the matching `fileKey` as the field's `subvalue` when creating the submission. Presigned URLs expire after 2 hours.`createFileUploadUrls`	POST	Generate presigned S3 upload URLs for a file field.
Permanently delete a submission and all associated data`deleteSubmission`	DELETE	Permanently delete a submission and all associated data
Retrieve a paginated list of submissions across all forms`getSubmissionsList`	GET	Retrieve a paginated list of submissions across all forms
Retrieve a paginated list of submissions for a specific form`listSubmissions`	GET	Retrieve a paginated list of submissions for a specific form
Retrieve detailed information about a specific submission`getSubmission`	GET	Retrieve detailed information about a specific submission
Retrieve uploaded file from a submission`getSubmissionUpload`	GET	Retrieve uploaded file from a submission
Update an existing submission with new data`editSubmission`	PUT	Update an existing submission with new data

Submit Actions6

Create a form WebMerge integration`createFormWebmergeIntegration`	POST	Create a form WebMerge integration
Create a new submit action that defines what happens after a form is submitted`createSubmitAction`	POST	Create a new submit action that defines what happens after a form is submitted
Permanently remove a submit action from a form`deleteSubmitAction`	DELETE	Permanently remove a submit action from a form
Retrieve all submit actions configured for a specific form`listSubmitActions`	GET	Retrieve all submit actions configured for a specific form
Retrieve detailed information about a specific submit action`getSubmitAction`	GET	Retrieve detailed information about a specific submit action
Update the configuration of an existing submit action`updateSubmitAction`	PUT	Update the configuration of an existing submit action

Themes4

Assign a theme to a specific form in the current account`assignThemeToForm`	PUT	Assign a theme to a specific form in the current account
Copies a theme within the current account (creates a duplicate)`copyTheme`	POST	Copies a theme within the current account (creates a duplicate)
Delete a custom theme from the current account. Forms using this theme will be switched to the default theme.`deleteTheme`	DELETE	Delete a custom theme from the current account.
Get a paginated list of themes available in the current account`getAccountThemes`	GET	Get a paginated list of themes available in the current account

Webhook6

Create a new webhook for a form`createWebhook`	POST	Create a new webhook for a form
Delete a webhook`deleteWebhook`	DELETE	Delete a webhook
Get OpenAPI definition for a form's webhook`getWebhookOpenApi`	GET	Get OpenAPI definition for a form's webhook
Get webhook details`getWebhook`	GET	Get webhook details
List webhooks for a form`listWebhooks`	GET	List webhooks for a form
Update an existing webhook`updateWebhook`	PUT	Update an existing webhook