Formable
Formable is a e-signing API and SDK for developers to integrate e-signing service into their software. Formable supports 10+ languages and frameworks.
About Formable
Formable provides embeddable e-signing and redlining APIs for developers to integrate contract workflows into their own products. The signing API accepts a template ID and recipient details via a REST call and returns a short-lived signing URL that can be rendered in an iframe, without redirects or a separate authentication flow for signers. Webhook events notify the integrating server when recipients view, complete, or decline a document.
Backend examples are provided for Node.js, Python, Go, Ruby, Java, and PHP. The API is positioned for platforms that need embedded signing built into their own product, such as virtual data rooms, HR onboarding, construction OS, digital mortgage, EOR platforms, transaction platforms, vendor onboarding, legal ops, lease platforms, investor onboarding, sales CPQ, fund admin, procurement software, insurance platforms, and eConsent platforms.
Key features
- Embedded e-signing via REST API returning an iframe-ready signing URL
- Redlining API for contract negotiation workflows
- Webhook events for document viewed, completed, or declined
- Template-based signature requests with signer and sender metadata
- SDK/code examples for Node.js, Python, Go, Ruby, Java, and PHP
Frequently asked questions
What platforms or languages does Formable support?
Formable's API works with any backend and provides examples in Node.js (TypeScript), Python, Go, Ruby, Java, and PHP.
How does the embedded signing flow work?
You create a signature request with a template ID and signer/sender info, then mint a short-lived signingUrl to embed directly in an iframe with no redirects or separate signer authentication.
Can I get notified when a signer takes action?
Yes, Formable sends webhook events to your server when recipients view, complete, or decline a document.
Who is Formable's API for?
It's for developers building contract workflows into platforms like virtual data rooms, HR onboarding, digital mortgage, legal ops, vendor onboarding, and similar products.
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