Primary domains for DocuSign Web Service
Live (Production)
https://www.docusign.net or https://na2.docusign.net] - this is only for Live (in-production) use. Usage is dictated by purchased plan contract. Certification is required before API integrated applications can make calls into this environment.
Note: Prod sites are NA1 (www.docusign.net), NA2 (na2.docusign.net), and EU1 (eu1.docusign.net)
Note: EU1 is normally reserved for accounts operating predominately outside of the Western hemisphere.
Sandbox (Demo)
https://demo.docusign.net - this is for development and testing. This site is similar to Production environment but not quite as scalable/stable. Usage is free. This site also serves as the Disaster Recovery site and should always be included in any IP Address/URL tables used for configuration/allowed access.
SOAP
DocuSign SOAP endpoints & WSDL:
In general,
https://{site}.docusign.net/api/3.0/dsapi.asmx?wsdl
Browsing to https://www.docusign.net/api/3.0/dsapi.asmx provides a page listing the methods, with links to display samples of the SOAP body structure for invoking the method (sample includes request and response).
Examples for NA1:
https://www.docusign.net/api/3.0/dsapi.asmx?wsdl
https://www.docusign.net/api/3.0/Credential.asmx?wsdl
https://www.docusign.net/api/3.0/accountmanagement.asmx?wsdl
REST
https://www.docusign.net/restapi/help
API Endpoints
X-DocuSign-Authentication HTTP header used like REST see this post How should the header X-DocuSign-Authentication be used for REST and SOAP?
SOAP
https://www.docusign.net/api/3.0/dsapi.asmx
https://www.docusign.net/api/3.0/Credential.asmx
https://www.docusign.net/api/3.0/accountmanagement.asmx
SCHEMA
https://demo.docusign.net/api/3.0/schema/dsx.xsd
Authentication via WS-Security UsernameToken in SOAP Header.
Note: this endpoint has 4 additional obsolete methods not available via dsapi.asmx endpoint. Recommend you avoid this endpoint unless you need WS-Security or the 4 obsolete methods: (oldest but shown in many samples)
https://www.docusign.net/api/3.0/api.asmx
REST
X-DocuSign-Authentication Header needed see this post How should the header X-DocuSign-Authentication be used for REST and SOAP?
https://www.docusign.net/restapi/
https://www.docusign.net/restapi/v1
https://www.docusign.net/restapi/v2