# Formstack

**Canonical:** https://apis.io/providers/formstack/  
**Website:** https://www.formstack.com/  
**APIs profiled:** 17

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.

## Kin Score — 39.3 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 39.3).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 58.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 36.8 |
| Access Clarity | 36.8 |

## Agent readiness — 34.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (17)

- **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.
- **Formstack Confirmations API** — The Confirmations API from Formstack — 2 operation(s) for confirmations.
- **Formstack Fields API** — The Fields API from Formstack — 2 operation(s) for fields.
- **Formstack Folders API** — The Folders API from Formstack — 2 operation(s) for folders.
- **Formstack Forms API** — The Forms API from Formstack — 5 operation(s) for forms.
- **Formstack Notifications API** — The Notifications API from Formstack — 2 operation(s) for notifications.
- **Formstack Subaccounts API** — The Subaccounts API from Formstack — 1 operation(s) for subaccounts.
- **Formstack Submissions API** — The Submissions API from Formstack — 2 operation(s) for submissions.
- **Formstack Webhooks API** — The Webhooks API from Formstack — 2 operation(s) for webhooks.

## Agentic access (1)

- **Formstack Agentic Access** — 39 operations · 23 acting

## Security (4)

- **Formstack Authentication** — oauth2 · 1 scheme
- **Formstack Domain Security** — TLSv1.3 · HSTS · DMARC
- **Formstack Vulnerability Disclosure** — disclosure policy published
- **Formstack Trust Center** — SOC 2, ISO 27001, ISO 27017, ISO 27018, PCI DSS, HIPAA, FedRAMP, GDPR, CSA STAR

## Plans (1)

- **Formstack Plans Pricing**

## Tags

Forms, Documents, E-Signature, Workflow-Automation, No-Code, Authentication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/formstack/). Scores are computed from the provider's own public artifacts under a published rubric.