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As edge computing deployment becomes increasingly widespread, developers are facing significant challenges in integrating APIs from multiple standards bodies and open-source frameworks—such as ETSI MEC, CAMARA, and TM Forum—each with different focuses yet playing complementary roles in building a complete telco edge cloud ecosystem. To address this, the European Telecommunications Standards Institute (ETSI) has recently published the white paper “MEC Application Developer Guidelines for Universal Access to Service APIs Across the Industry” , aiming to clarify the relationships among these initiatives and provide clear, practical integration guidance.