diff --git a/Changelog.md b/Changelog.md
index 5168d039..cbcbf1be 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -15,6 +15,7 @@ This changelog should be updated as part of a PR if the work is worth noting (mo
 
 #### Stabilized features
 - [#741](https://github.com/timescale/timescaledb-toolkit/pull/741): Stabilize `approx_count_distinct`
+- [#748](https://github.com/timescale/timescaledb-toolkit/pull/748): Stabilize `approx_percentile_array`
 
 #### Other notable changes
 - [#743](https://github.com/timescale/timescaledb-toolkit/pull/743): Remove support for direct upgrades from toolkit versions more than 1 year old. Toolkit versions 1.4.x and 1.5.x will have to upgrade to an intermediate version before upgrading to 1.16.0.
diff --git a/extension/src/accessors.rs b/extension/src/accessors.rs
index cfbf0417..473b677f 100644
--- a/extension/src/accessors.rs
+++ b/extension/src/accessors.rs
@@ -578,28 +578,24 @@ pub fn accessor_integral(unit: default!(&str, "'second'")) -> AccessorIntegral<'
         }
     }
 }
-#[pg_schema]
-pub mod toolkit_experimental {
-    use super::*;
-
-    pg_type! {
-        #[derive(Debug)]
-        struct AccessorPercentileArray<'input> {
-            len: u64,
-            percentile: [f64; self.len],
-        }
+
+pg_type! {
+    #[derive(Debug)]
+    struct AccessorPercentileArray<'input> {
+        len: u64,
+        percentile: [f64; self.len],
     }
+}
 
-    ron_inout_funcs!(AccessorPercentileArray);
+ron_inout_funcs!(AccessorPercentileArray);
 
-    #[pg_extern(immutable, name = "approx_percentiles")]
-    pub fn accessor_percentiles(unit: Vec<f64>) -> AccessorPercentileArray<'static> {
-        unsafe {
-            flatten! {
-                AccessorPercentileArray{
-                    len: unit.len().try_into().unwrap(),
-                    percentile: unit.into(),
-                }
+#[pg_extern(immutable, name = "approx_percentiles")]
+pub fn accessor_percentiles(unit: Vec<f64>) -> AccessorPercentileArray<'static> {
+    unsafe {
+        flatten! {
+            AccessorPercentileArray{
+                len: unit.len().try_into().unwrap(),
+                percentile: unit.into(),
             }
         }
     }
diff --git a/extension/src/stabilization_info.rs b/extension/src/stabilization_info.rs
index 5e6d6cea..939fe2d4 100644
--- a/extension/src/stabilization_info.rs
+++ b/extension/src/stabilization_info.rs
@@ -29,6 +29,9 @@ crate::functions_stabilized_at! {
         num_live_ranges(heartbeatagg),
         trim_to(heartbeatagg,timestamp with time zone,interval),
         trim_to(timestamp with time zone,interval),
+        accessorpercentilearray_in(cstring),
+        accessorpercentilearray_out(accessorpercentilearray),
+        arrow_uddsketch_approx_percentile_array(uddsketch,accessorpercentilearray),
     }
     "1.15.0" => {
         arrow_counter_interpolated_delta(countersummary,counterinterpolateddeltaaccessor),
@@ -692,6 +695,7 @@ crate::types_stabilized_at! {
         accessornumgaps,
         accessornumliveranges,
         heartbeattrimtoaccessor,
+        accessorpercentilearray
     }
     "1.15.0" => {
         counterinterpolateddeltaaccessor,
@@ -821,6 +825,7 @@ crate::operators_stabilized_at! {
         "->"(heartbeatagg,accessornumgaps),
         "->"(heartbeatagg,accessornumliveranges),
         "->"(heartbeatagg,heartbeattrimtoaccessor),
+        "->"(uddsketch,accessorpercentilearray),
     }
     "1.15.0" => {
         "->"(countersummary,counterinterpolateddeltaaccessor),
diff --git a/extension/src/stabilization_tests.rs b/extension/src/stabilization_tests.rs
index c66a03ab..2b414280 100644
--- a/extension/src/stabilization_tests.rs
+++ b/extension/src/stabilization_tests.rs
@@ -91,6 +91,13 @@ mod tests {
                             return None;
                         }
 
+                        // Hack to fix the function macro's inability to handle [] in the type double precision[].
+                        if function == "approx_percentile_array(double precision[],uddsketch)"
+                            || function == "approx_percentiles(double precision[])"
+                        {
+                            return None;
+                        }
+
                         return Some(val);
                     }
 
diff --git a/extension/src/uddsketch.rs b/extension/src/uddsketch.rs
index f0372734..18ca590d 100644
--- a/extension/src/uddsketch.rs
+++ b/extension/src/uddsketch.rs
@@ -6,8 +6,8 @@ use uddsketch::{SketchHashKey, UDDSketch as UddSketchInternal};
 
 use crate::{
     accessors::{
-        toolkit_experimental, AccessorApproxPercentile, AccessorApproxPercentileRank,
-        AccessorError, AccessorMean, AccessorNumVals,
+        AccessorApproxPercentile, AccessorApproxPercentileRank, AccessorError, AccessorMean,
+        AccessorNumVals, AccessorPercentileArray,
     },
     aggregate_utils::in_aggregate_context,
     flatten,
@@ -585,17 +585,13 @@ pub fn uddsketch_approx_percentile<'a>(percentile: f64, sketch: UddSketch<'a>) -
 #[opname(->)]
 pub fn arrow_uddsketch_approx_percentile_array<'a>(
     sketch: UddSketch<'a>,
-    percentiles: toolkit_experimental::AccessorPercentileArray<'a>,
+    percentiles: AccessorPercentileArray<'a>,
 ) -> Vec<f64> {
     approx_percentile_slice(percentiles.percentile.as_slice(), sketch)
 }
 
 // Approximate the value at the given approx_percentile (0.0-1.0) for each entry in an array
-#[pg_extern(
-    immutable,
-    schema = "toolkit_experimental",
-    name = "approx_percentile_array"
-)]
+#[pg_extern(immutable, name = "approx_percentile_array")]
 pub fn uddsketch_approx_percentile_array<'a>(
     percentiles: Vec<f64>,
     sketch: UddSketch<'a>,
@@ -1047,7 +1043,7 @@ mod tests {
             let (value, error) = client
                 .update(
                     "SELECT \
-                    toolkit_experimental.approx_percentile_array(array[0.9,0.5,0.2], approx), \
+                    approx_percentile_array(array[0.9,0.5,0.2], approx), \
                     error(approx) \
                     FROM uddsketch_test",
                     None,
@@ -1061,7 +1057,7 @@ mod tests {
             let (test_value, test_error) = client
                 .update(
                     "SELECT \
-                    toolkit_experimental.approx_percentile_array(array[0.9,0.5,0.2], approx), \
+                    approx_percentile_array(array[0.9,0.5,0.2], approx), \
                     error(approx) \
                     FROM percentile_agg",
                     None,
@@ -1134,7 +1130,7 @@ mod tests {
             let (value, error) = client
                 .update(
                     "SELECT \
-                    toolkit_experimental.approx_percentile_array(array[0.9,0.5,0.2], approx), \
+                    approx_percentile_array(array[0.9,0.5,0.2], approx), \
                     error(approx) \
                     FROM uddsketch_test",
                     None,
@@ -1147,7 +1143,7 @@ mod tests {
 
             let (test_value_arrow, test_error_arrow) = client
                 .update(
-                    "SELECT approx->toolkit_experimental.approx_percentiles(array[0.9,0.5,0.2]), \
+                    "SELECT approx->approx_percentiles(array[0.9,0.5,0.2]), \
         	     error(approx) \
                     FROM uddsketch_test",
                     None,