Integration of digital identification systems into B2B service architectures

The article examines the architecture and integration practices of digital identification systems within B2B services, with a focus on interface compatibility, protocol standardization and operational reliability under high load. It analyzes the use of protocols such as OAuth 2.0, OpenID Connect, SAML and SCIM in combination with architectural approaches including REST, gRPC and GraphQL. The empirical component is based on case studies of integrating identification solutions into external B2B environments, including corporate channels, digital platforms and offline infrastructures. The importance of standardized API contracts and technical documentation is emphasized as a key factor in reducing onboarding time and increasing system robustness. The findings provide a substantiated framework for designing identification components in B2B service architectures with regard to requirements of reliability, interoperability and scalability.