Hi, @MarcoBe4
If a developer (you) wants to expose their customer’s Sign agreements within the developer application, the developer would need to:
1. Create an application / integration with Sign // https://opensource.adobe.com/acrobat-sign/developer_guide/index.html
2. “Certify” that application with Adobe (in order for the application to have permission to work with any customer Sign account) // https://www.adobe.com/go/esign-dev-cert
3. Then, the developer’s customer could: a/ authenticate into their Sign account (from within developer application), b/ developer application could then display customer’s agreements from customer’s Sign account
If developer needs assistance with this process, you can start with a Support Case, who can answer further questions // https://helpx.adobe.com/sign/admin/contact-support.html
Dave @ Acrobat Sign