diff --git a/docs/api.rst b/docs/api.rst
index a272fc2..d57f5e8 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -19,7 +19,12 @@ Regridding
 
 .. autofunction:: earth2grid.get_regridder
 
+.. autofunction:: earth2grid.KNNS2Interpolator
+
+.. autofunction:: earth2grid.BilinearInterpolator
+
 Other utilities
 ---------------
 
+.. autofunction:: earth2grid.healpix.reorder
 .. autofunction:: earth2grid.healpix.pad