Aboveground biomass density (AGBD) estimates from Earth Observation (EO) can be presented with the consistency standards mandated by United Nations Framework Convention on Climate Change (UNFCCC). This article delivers AGBD estimates, in the format of Intergovernmental Panel on Climate Change (IPCC) Tier 1 values for natural forests, sourced from National Aeronautics and Space Administration's (NASA's) Global Ecosystem Dynamics Investigation (GEDI) and Ice, Cloud and land Elevation Satellite (ICESat-2), and European Space Agency's (ESA's) Climate Change Initiative (CCI). It also provides the underlying classification of forests by ecozones, continents and status (primary, young (≤20 years) and old secondary (>20 years)) as geospatial layers. The approaches leverage strengths of various EO-derived datasets, compiled in an open-science framework through the Multi-mission Algorithm and Analysis Platform (MAAP), enabling flexibility to adopt new datasets. EO-based AGBD estimates are expected to contribute to the IPCC Emission Factors Database in support of UNFCCC processes, and the forest classification expected to support the generation of other policy-relevant datasets while reflecting ongoing shifts in global forests with climate change.