formstack.com
Formstack is a no-code productivity platform for building forms, generating documents, and collecting eSignatures, with workflow automation and Salesforce-focused offerings. It serves businesses that need to digitize data collection and related approval or document processes.
Formstack exposes three documented REST API surfaces: the current Formstack API v2025 (PAT bearer auth), the legacy Formstack API v2 (OAuth2 bearer or GET query token), and the legacy Formstack Documents/WebMerge API (Basic auth with API key + secret); it also documents a SCIM API but its auth mechanics were not found in the scraped pages. No public GraphQL, MCP, or CLI surfaces were found.
- Formstack Documents APIdiscovered
- Formstack API v2025discovered
- Formstack API v2discovered
- Formstack SCIM APIdiscovered
In Formstack Documents API authentication, Formstack says each user must create an API key from their account page; when the key is generated, a matching secret is also generated. Use the Key:Secret pair for Basic HTTP authentication to the Documents API.
Create a Personal Access Token by following Formstack Personal Access Tokens. The developer docs state all v2025 API calls require a PAT, and requests send it as Authorization: Bearer fs_pat_<your-personal-access-token>.
Create an application record at Formstack application management. The v2 docs say creating an application also creates an access token, and additional user access tokens can be minted through the OAuth2 authorization flow documented in Authorization. Use the resulting OAuth2 access token as a bearer token, or as oauth_token on GET requests where supported.
conventions · 1/7 published
- integrations.json——
- llms.txt✓https://formstack.com/llms.txt
- API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✗
/.well-known/oauth-protected-resource - Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing