eSignature API
Enhance your software with realtime, embedded eSignature, or boost your company efficiency with programmatic access and webhooks, integrations to Office and more.

Feature Rich
REST API
Scalable
Signatories, Approvers, Witnesses? We've got you. On-the-fly docs with HTML, or use powerful PDF text tagging for customisable PDF sending.
Easy to use REST API. Stable and reliable in state and in pricing. Utilise webhooks to give your customers real-time notifications
Scale with Legalesign teams and give customers all the features immediately with accounts in the web app, until you get them coded.
Track usage with the API Dashboard
Your API dashboard contains your request and webhook logs to assist with debugging and so you can track usage.

Flexible structure that accepts HTML or PDF
Upload PDFs or create on the fly with HTML. Set text tags in PDFs to make form creation easy. The digital signature API is structured around groups/teams, simple to implement but with the flexibility to describe many organisational systems.

Embeddable PDF edit & signing
Use the API to frame the PDF edit page and the signing pages to make seamless integrations.
Create Users within the API and silo them in teams. For complex use-cases, direct them back to the app for features or edge-cases you haven't integrated yet.

What Customers Say About Legalesign API
So far, we’ve helped thousands of happy customers transform and improve their business workflows with our products.
Market Leaders For Three Years Running
Legalesign is recognised as the best eSignature software for mid-market support and best for customer relationships (G2 Fall Report 2022).

Your trusted eSignature supplier for business.





Download Our Executive Summary
Unlock the business value from eSignature technology using Legalesign, the most feature-rich and secure Uk-based platform for daily business use.

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