The SignNow REST API lets your website or app send, sign, and track documents automatically. Embed signing, prefill templates, route by role, and get real-time status via webhooks—secure, compliant, and built for scale. Trigger sends, route templates by role, and track progress via webhooks—all with audit-ready security. Common uses include auto-sending NDAs from your CRM when an opportunity opens, generating onboarding packets from your HRIS on “new hire,” collecting customer agreements inside a web/mobile app, and streamlining vendor onboarding from your procurement system. You can also build self-serve flows with invite links, enforce authentication, and store signed PDFs and certificates back to your cloud drive or DMS.
What is an API?
An API is a way for your software to “click the buttons” in SignNow—without a human. The SignNow REST API exposes core features (sending invites, filling templates, embedded signing, downloading signed PDFs + Audit Trail) so you can run e-signature workflows from your own app, CRM, portal, or cloud system.
What you can build
CRM → NDA: When an opportunity reaches “Discovery,” create an NDA from a template, prefill the company name, and email invites automatically.
HRIS → Onboarding pack: On “employee created,” generate an offer + policies bundle with roles (Employee → Manager → HR) and enforce the signing order.
In-app contracts: Embed the signer view so customers complete agreements without leaving your site/app.
Vendor onboarding: Collect W-9s and certificates with Attachment fields (Enterprise), store everything back to your DMS, and tag for search.
How SignNow concepts map to the API
Templates & roles: Define fields and recipients once; the API creates documents from them.
Signing order: Enforce sequential or parallel steps programmatically.
Pre-filled Text & Labels: Prefill values you know; keep repeated answers in sync.
Authentication: Add passcode/SMS/email OTP for stronger identity checks.
Audit Trail (Document History): Download signed PDFs with the certificate of events.
📝 API is not a part of a regular self-serve subscription package. Click here to learn more about the API pricing.
Check out our documentation page here.
What’s next
Set up a sandbox, create a template with roles, and try a small end-to-end flow (create → send → sign → download with History).
When it looks good, move credentials to production and enable webhooks for live tracking.