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Dev tools · August 21, 2026

eSignature API

Add eSignatures to your apps with a simple REST API

What it does

eSignature API makes it easy for developers to add electronic signatures to their applications without building a signing system from scratch. With a simple REST API, you can create document signing workflows, generate PDFs, collect signatures, and automate signing processes. It is built for businesses and developers who want a flexible, scalable way to integrate eSignatures into their existing products and workflows.

The eSignature API that generates PDFs and collects signatures in one platform. Free plan: 50 documents, no credit card. No per-envelope fees. ESIGN Act, UETA and eIDAS compliant.

eSignature API by CraftMyPDF lets developers collect legally binding signatures on any document. Generate the PDF and sign it in the same platform. No per-envelope fees. No seat limits. Just a clean REST API. Three steps to add legally binding signatures to any document or workflow. Design a template in the drag-and-drop editor or upload an existing PDF. Add signature fields, text fields, dates, and checkboxes. Call the eSignature API with recipient details. Set signing order, roles, field positions, and optional envelope expiration. One API call. Done. Recipients sign on any device. You receive a webhook on completion and download the signed PDF. The full audit trail is attached.…from esignature-api.com

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