Claymate is a Blender add-on built by Extra 3D for clay renders. It adds detail to those renders using your own bump, normal and displacement maps, so the surface detail comes from maps you supply.
The add-on works across several Blender releases, covering versions 4.0, 4.1, 4.2, 4.3 and 4.4. It supports both the Cycles and Eevee render engines, so you can use it with either engine. Claymate is distributed under the GPL license, and a demo video is available for anyone who wants a closer look before installing.
Within the superhive library, Claymate is a focused, single-purpose tool that stays on the task of adding map-driven detail to clay renders in Blender. For documentation, the installation guide and current licensing, the developer's page is the place to check.