SAP Integration | Secure Access | Auth0 for 3rd Party APIs

SAP Integration | Secure Access | Auth0 is essential for businesses seeking seamless data exchange, process automation, and enhanced efficiency. Whether connecting SAP ERP, SAP S/4HANA, or SAP Business Technology Platform (BTP) with external solutions like CRM, e-commerce, or analytics tools, API-based integration plays a crucial role. 

Additionally, a key challenge in this process is ensuring secure authentication and authorization. Solutions like Auth0, along with other Identity and Access Management (IAM) providers, enable secure API access, ensuring that data is exchanged safely between SAP and third-party applications. In this article, we explore best practices for SAP integration with third-party APIs, the role of OAuth, JWT, and SAML authentication, Furthermore, we will discuss how businesses can leverage SAP BTP, SAP Integration Suite, and middleware platforms for seamless connectivity. 

Before communication from and to your SAP backend system can take place, authentication with public and private keys, or certificates, must take place. Trust manager – STRUST is one option for doing this.

A lot of ISVs we work with have a requirement to integrate their own APIs , Token based APIs etc to be able to further update SAP data or read SAP data in their system.

Go to T-code /nSTRUST, Open the selected one click on change and scroll down

there will be an option to install and add certificate

To avoid errors like

SAP Integration | Secure Access | Auth0: Using Trace file to Analyze the issue

1. Go to transaction SMICM.
2. Reset the trace file in menu Goto -> trace file -> reset.
3. Increase the trace level to 2 at Goto -> trace level -> increase.
4. Go to SM59 and perform the connection test.
5. Go back to SMICM and decrease the trace level at Goto -> trace level -> decrease.
6. Save the trace file at Goto -> trace file -> save locally.

Settings in SM59

Ensure that below host names are correctly entered

• Do not use HTTPS or HTTP as that gets automatically added
• In Sm59 ensure the correct settings for SSL and SSL certificate is selected.

Peer certificate Untrusted

Upload the certificate and we generally Upload in all 3 sections

SAP server Standard

SAP client SSL (Anonymous)

Client SSL (Standard)

Certificate for Auth0 was downloadable from the site directly

Ensure that you download both the certificate related to auth0.com in this case and also the Root ISRG Root X1

SAP Integration | Secure Access | Auth0: Fixing HOST unknown Issue

There are multiple issues which can cause this

2549801 – Connect to proxy:8080 failed: NIEHOST_UNKNOWN(-2)

1. Transaction SICF
2. select Client -> Proxy settings from the menu bar
3. Untick “Proxy setting is active”

SAP API integration unlocks new opportunities for businesses by enabling secure, scalable, and real-time connectivity with third-party solutions. By leveraging Auth0, OAuth, SAP BTP, and API management tools, organizations can ensure robust authentication, enhanced security, and smooth data exchange.

Partnering with an experienced SAP integration provider can accelerate deployment, minimize risks, and optimize performance. If you’re looking for a reliable partner to integrate SAP with external applications, contact us today to explore customized solutions tailored to your business needs.

For best practices on SAP system security and access management, check out our in-depth guide:
SAP Trial Systems | CAL Systems: Setup & Security Best Practices

Additionally, to read more visit