This report assesses options for the effective implementation of sustainable development impact assessment, in the context of climate change mitigation mechanisms such as those of Article 6 of the Paris Agreement. To ensure that these mechanisms contribute to sustainable development in the host country, it is necessary to measure this effect. The results of the project show how and which indicators at project level can be used in a targeted manner for monitoring, reporting and verification (MRV). In this way, tools are made available to decision-makers and project developers in voluntary and mandatory markets to substantiate the sustainable effect of market mechanisms.