Following a first phase of experimentation in 2018, the association of the Natural Parks of the Massif Central (IPAMAC) wants to consolidate methodological tools for the implementation of Payments contracts for Environmental Services, through experimentation in 5 territories (PNR du Haut-Languedoc, Volcans d’Auvergne, Périgord-Limousin, Livradois-Forez and Pilat). This project therefore aims to support the territories of the Central Massif in the stages of implementation of a PES: from the territorial diagnosis (a finding of a degraded ecosystem or a risk of degradation) to experimentation, through the consultation phase between the stakeholders concerned. The experiments will thus allow the tools to be tested and adjusted. These experiments will be valued and transferred to a large scale (Central Massif and beyond) to inspire other territories to implement PES.