diff --git a/docs/src/api.md b/docs/src/api.md
index dfaadfb..c4f2b57 100644
--- a/docs/src/api.md
+++ b/docs/src/api.md
@@ -36,6 +36,12 @@ observed
 parameter_observed
 ```
 
+#### Historical index providers
+
+```@docs
+is_historical
+```
+
 #### Parameter timeseries
 
 If the index provider contains parameters that change during the course of the simulation
@@ -67,6 +73,12 @@ getu
 setu
 ```
 
+#### Historical value providers
+
+```@docs
+get_history_function
+```
+
 ### Parameter indexing
 
 ```@docs