SignNow API Integration

This Java-based project integrates with the SignNow API to enable secure digital signing of documents and inviting individual or group signers using OAuth 2.0 authentication.

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Table of Contents

• Overview
• OAuth 2.0 Authentication Flow
• Key API Endpoints
• Configuration
• Core Functionalities
  • Access Token Generation
  • Upload Document
  • Download Document
  • Invite Person to Sign
  • Invite Group to Sign
  • Assign Roles to Signers
• Project Structure
• Security Best Practices
• References
• Author

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Overview

SignNow provides APIs to electronically sign documents, manage workflows, and collaborate with multiple signers. This integration supports:

• OAuth 2.0 password grant authentication
• Uploading documents for signature
• Downloading signed documents
• Inviting individual users or groups to sign documents
• Assigning signer roles to document fields

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OAuth 2.0 Authentication Flow

This project uses the OAuth 2.0 Password Grant Flow for obtaining an access token.

Flow Steps:

1. Client prepares credentials:

   • client_id and client_secret (Base64 encoded)
   • User credentials: username and password

2. Request Access Token:
   POST to the token endpoint:

3. Endpoints URL

shp_clientId=YOUR_CLIENT_ID_HERE (e.g. "a3aefbdc****") shp_clientSecret=YOUR_CLIENT_SECRET_HERE (e.g. "27e6ede2****") userName=YOUR_USERNAME passWord=YOUR_PASSWORD tokenUrl=https://api-eval.signnow.com/oauth2/token uploadUrl=https://api-eval.signnow.com/document inviteUrlTemplate=https://api-eval.signnow.com/document/{document_id}/invite groupInviteUrlTemplate=https://api-eval.signnow.com/group/{group_id}/invite assignRoleUrlTemplate=https://api-eval.signnow.com/document/{document_id}/role