Formstack website screenshot

Formstack

Formstack is a no-code workplace productivity platform spanning online forms, document generation, electronic signature, and workflow automation. The developer portal at developers.formstack.com exposes a REST API (v2025.0) for forms, submissions, fields, webhooks, folders, and partial submissions, plus product-specific surfaces for Formstack Documents, Formstack Sign, and Formstack Workflows. Authentication uses OAuth 2.0. Machine-readable indexes and OpenAPI artifacts are surfaced at developers.formstack.com/llms.txt.

9 APIs 0 Features
FormsDocumentseSignatureWorkflow AutomationNo-CodeOAuth2

APIs

Formstack Forms API

REST API for creating, reading, updating, and deleting forms in a Formstack account, including form configuration, styling, and access rules.

Formstack Submissions API

Read, create, update, and delete form submissions; supports filtering by date, search, and field values. Returns submitted field data and metadata.

Formstack Fields API

Programmatically manage form fields - text, select, file upload, signature, payment, calculation, and others - including ordering, validation, and conditional logic.

Formstack Webhooks API

Configure webhook subscriptions to receive submission events at a customer-provided URL, with retry semantics for failed deliveries.

Formstack Folders API

Manage folder organization for forms within a Formstack account.

Formstack Documents API

Programmatic interface to Formstack Documents (formerly WebMerge) for generating PDFs, Word docs, and other templated documents from data payloads.

Formstack Sign API

Electronic signature API for sending documents for signature, tracking status, and retrieving signed copies. Part of the Formstack Suite.

Formstack Workflows API

Workflow automation surface for routing submissions, documents, and approvals across multi-step business processes.

Formstack OAuth 2.0

OAuth 2.0 authorization server used to authenticate API clients and issue access tokens for the Formstack REST API.

Collections

Formstack Webhooks

OPEN

Formstack API

OPEN

Pricing Plans

Formstack Plans Pricing

1 plans

PLANS

Rate Limits

Formstack Rate Limits

2 limits

RATE LIMITS

FinOps

Formstack Finops

FINOPS

Resources

🔗
Website
Website
🔗
Documentation
Documentation
📄
ChangeLog
ChangeLog
🔗
LlmsText
LlmsText
🔗
LinkedIn
LinkedIn
👥
GitHub
GitHub
🔗
Twitter
Twitter

Sources

Raw ↑ 
opencollection: 1.0.0
info:
  name: Formstack API
  version: '2025'
request:
  auth:
    type: oauth2
    flow: authorization_code
    authorizationUrl: https://www.formstack.com/api/v2/oauth2/authorize
    accessTokenUrl: https://www.formstack.com/api/v2/oauth2/token
    credentials:
      clientId: '{{clientId}}'
      clientSecret: '{{clientSecret}}'
items:
- info:
    name: Forms
    type: folder
  items:
  - info:
      name: List forms
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/forms.json
      params:
      - name: page
        value: ''
        type: query
      - name: per_page
        value: ''
        type: query
      - name: folder
        value: ''
        type: query
    docs: List forms
  - info:
      name: Create a form
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/forms.json
    docs: Create a form
  - info:
      name: Get form
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Get form
  - info:
      name: Update form
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/form/:formId.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Update form
  - info:
      name: Delete form
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/form/:formId.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Delete form
  - info:
      name: Get form HTML
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/html.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Get form HTML
  - info:
      name: Copy form
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/copy.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Copy form
  - info:
      name: Generate prefilled URL
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/prefill.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Generate prefilled URL
- info:
    name: Fields
    type: folder
  items:
  - info:
      name: List fields
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/field.json
      params:
      - name: formId
        value: ''
        type: path
    docs: List fields
  - info:
      name: Create field
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/field.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Create field
  - info:
      name: Get field
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/field/:fieldId.json
      params:
      - name: fieldId
        value: ''
        type: path
    docs: Get field
  - info:
      name: Update field
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/field/:fieldId.json
      params:
      - name: fieldId
        value: ''
        type: path
    docs: Update field
  - info:
      name: Delete field
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/field/:fieldId.json
      params:
      - name: fieldId
        value: ''
        type: path
    docs: Delete field
- info:
    name: Submissions
    type: folder
  items:
  - info:
      name: List submissions for a form
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/submission.json
      params:
      - name: formId
        value: ''
        type: path
      - name: page
        value: ''
        type: query
      - name: per_page
        value: ''
        type: query
      - name: min_time
        value: ''
        type: query
      - name: max_time
        value: ''
        type: query
    docs: List submissions for a form
  - info:
      name: Create submission
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/submission.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Create submission
  - info:
      name: Get submission
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/submission/:submissionId.json
      params:
      - name: submissionId
        value: ''
        type: path
    docs: Get submission
  - info:
      name: Update submission
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/submission/:submissionId.json
      params:
      - name: submissionId
        value: ''
        type: path
    docs: Update submission
  - info:
      name: Delete submission
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/submission/:submissionId.json
      params:
      - name: submissionId
        value: ''
        type: path
    docs: Delete submission
- info:
    name: Confirmations
    type: folder
  items:
  - info:
      name: List confirmations
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/confirmation.json
      params:
      - name: formId
        value: ''
        type: path
    docs: List confirmations
  - info:
      name: Create confirmation
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/confirmation.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Create confirmation
  - info:
      name: Get confirmation
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/confirmation/:confirmationId.json
      params:
      - name: confirmationId
        value: ''
        type: path
    docs: Get confirmation
  - info:
      name: Update confirmation
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/confirmation/:confirmationId.json
      params:
      - name: confirmationId
        value: ''
        type: path
    docs: Update confirmation
  - info:
      name: Delete confirmation
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/confirmation/:confirmationId.json
      params:
      - name: confirmationId
        value: ''
        type: path
    docs: Delete confirmation
- info:
    name: Notifications
    type: folder
  items:
  - info:
      name: List notifications
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/notification.json
      params:
      - name: formId
        value: ''
        type: path
    docs: List notifications
  - info:
      name: Create notification
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/notification.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Create notification
  - info:
      name: Get notification
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/notification/:notificationId.json
      params:
      - name: notificationId
        value: ''
        type: path
    docs: Get notification
  - info:
      name: Update notification
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/notification/:notificationId.json
      params:
      - name: notificationId
        value: ''
        type: path
    docs: Update notification
  - info:
      name: Delete notification
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/notification/:notificationId.json
      params:
      - name: notificationId
        value: ''
        type: path
    docs: Delete notification
- info:
    name: Webhooks
    type: folder
  items:
  - info:
      name: List webhooks
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/form/:formId/webhook.json
      params:
      - name: formId
        value: ''
        type: path
    docs: List webhooks
  - info:
      name: Create webhook
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/form/:formId/webhook.json
      params:
      - name: formId
        value: ''
        type: path
    docs: Create webhook
  - info:
      name: Get webhook
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/webhook/:webhookId.json
      params:
      - name: webhookId
        value: ''
        type: path
    docs: Get webhook
  - info:
      name: Update webhook
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/webhook/:webhookId.json
      params:
      - name: webhookId
        value: ''
        type: path
    docs: Update webhook
  - info:
      name: Delete webhook
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/webhook/:webhookId.json
      params:
      - name: webhookId
        value: ''
        type: path
    docs: Delete webhook
- info:
    name: Folders
    type: folder
  items:
  - info:
      name: List folders
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/folder.json
    docs: List folders
  - info:
      name: Create folder
      type: http
    http:
      method: POST
      url: https://www.formstack.com/api/v2/folder.json
    docs: Create folder
  - info:
      name: Get folder
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/folder/:folderId.json
      params:
      - name: folderId
        value: ''
        type: path
    docs: Get folder
  - info:
      name: Update folder
      type: http
    http:
      method: PUT
      url: https://www.formstack.com/api/v2/folder/:folderId.json
      params:
      - name: folderId
        value: ''
        type: path
    docs: Update folder
  - info:
      name: Delete folder
      type: http
    http:
      method: DELETE
      url: https://www.formstack.com/api/v2/folder/:folderId.json
      params:
      - name: folderId
        value: ''
        type: path
    docs: Delete folder
- info:
    name: Subaccounts
    type: folder
  items:
  - info:
      name: List subaccounts
      type: http
    http:
      method: GET
      url: https://www.formstack.com/api/v2/subaccount.json
    docs: List subaccounts
bundled: true