diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/100_avg_metric.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/100_avg_metric.yml
new file mode 100644
index 0000000000000..5aec7f9e67c66
--- /dev/null
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/100_avg_metric.yml
@@ -0,0 +1,176 @@
+setup:
+  - do:
+      indices.create:
+          index: test_1
+          body:
+            settings:
+              number_of_replicas: 0
+            mappings:
+              test:
+                properties:
+                  int_field:
+                     type : integer
+                  double_field:
+                     type : double
+                  string_field:
+                     type: keyword
+
+  - do:
+       bulk:
+         refresh: true
+         body:
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    1
+           - int_field: 1
+             double_field: 1.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    2
+           - int_field: 51
+             double_field: 51.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    3
+           - int_field: 101
+             double_field: 101.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    4
+           - int_field: 151
+             double_field: 151.0
+             string_field: foo
+
+---
+"Basic test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_avg:
+              avg:
+                field: int_field
+            the_double_avg:
+              avg:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_avg.value: 76.0 }
+  - match: { aggregations.the_double_avg.value: 76.0 }
+
+---
+"Only aggs test":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_int_avg:
+              avg:
+                field: int_field
+            the_double_avg:
+              avg:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 0 }
+  - match: { aggregations.the_int_avg.value: 76.0 }
+  - match: { aggregations.the_double_avg.value: 76.0 }
+
+---
+"Filtered test":
+
+  - do:
+      search:
+        body:
+          query:
+            constant_score:
+              filter:
+                range:
+                  int_field:
+                    gte: 50
+          aggs:
+            the_int_avg:
+              avg:
+                field: int_field
+            the_double_avg:
+              avg:
+                field: double_field
+
+  - match: { hits.total: 3 }
+  - length: { hits.hits: 3 }
+  - match: { aggregations.the_int_avg.value: 101.0 }
+  - match: { aggregations.the_double_avg.value: 101.0 }
+
+
+---
+"Missing field with missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_avg:
+              avg:
+                field: foo
+                missing: 1
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_missing_avg.value: 1 }
+
+---
+"Missing field without missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_avg:
+              avg:
+                field: foo
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - is_false: aggregations.the_missing_avg.value
+
+---
+"Metadata test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_avg:
+              meta:
+                foo: bar
+              avg:
+                field: int_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_avg.value: 76.0 }
+  - match: { aggregations.the_int_avg.meta.foo: "bar" }
+
+---
+"Aggregating wrong datatype test":
+
+  - do:
+      catch: request
+      search:
+        body:
+          aggs:
+            the_string_avg:
+              avg:
+                field: string_field
+
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/110_max_metric.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/110_max_metric.yml
new file mode 100644
index 0000000000000..f3134f7bc857b
--- /dev/null
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/110_max_metric.yml
@@ -0,0 +1,173 @@
+setup:
+  - do:
+      indices.create:
+          index: test_1
+          body:
+            settings:
+              number_of_replicas: 0
+            mappings:
+              test:
+                properties:
+                  int_field:
+                     type : integer
+                  double_field:
+                     type : double
+                  string_field:
+                     type: keyword
+  - do:
+       bulk:
+         refresh: true
+         body:
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    1
+           - int_field: 1
+             double_field: 1.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    2
+           - int_field: 51
+             double_field: 51.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    3
+           - int_field: 101
+             double_field: 101.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    4
+           - int_field: 151
+             double_field: 151.0
+             string_field: foo
+---
+"Basic test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_max:
+              max:
+                field: int_field
+            the_double_max:
+              max:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_max.value: 151.0 }
+  - match: { aggregations.the_double_max.value: 151.0 }
+
+---
+"Only aggs test":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_int_max:
+              max:
+                field: int_field
+            the_double_max:
+              max:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 0 }
+  - match: { aggregations.the_int_max.value: 151.0 }
+  - match: { aggregations.the_double_max.value: 151.0 }
+
+---
+"Filtered test":
+
+  - do:
+      search:
+        body:
+          query:
+            constant_score:
+              filter:
+                range:
+                  int_field:
+                    lte: 60
+          aggs:
+            the_int_max:
+              max:
+                field: int_field
+            the_double_max:
+              max:
+                field: double_field
+
+  - match: { hits.total: 2 }
+  - length: { hits.hits: 2 }
+  - match: { aggregations.the_int_max.value: 51.0 }
+  - match: { aggregations.the_double_max.value: 51.0 }
+
+
+---
+"Missing field with missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_max:
+              max:
+                field: foo
+                missing: 1
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_missing_max.value: 1 }
+
+---
+"Missing field without missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_max:
+              max:
+                field: foo
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - is_false: aggregations.the_missing_max.value
+
+---
+"Metadata test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_max:
+              meta:
+                foo: bar
+              max:
+                field: int_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_max.value: 151.0 }
+  - match: { aggregations.the_int_max.meta.foo: "bar" }
+
+---
+"Aggregating wrong datatype test":
+
+  - do:
+      catch: request
+      search:
+        body:
+          aggs:
+            the_string_avg:
+              avg:
+                field: string_field
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/120_min_metric.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/120_min_metric.yml
new file mode 100644
index 0000000000000..26444bf0feb4b
--- /dev/null
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/120_min_metric.yml
@@ -0,0 +1,174 @@
+setup:
+  - do:
+      indices.create:
+          index: test_1
+          body:
+            settings:
+              number_of_replicas: 0
+            mappings:
+              test:
+                properties:
+                  int_field:
+                     type : integer
+                  double_field:
+                     type : double
+                  string_field:
+                     type: keyword
+  - do:
+       bulk:
+         refresh: true
+         body:
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    1
+           - int_field: 1
+             double_field: 1.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    2
+           - int_field: 51
+             double_field: 51.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    3
+           - int_field: 101
+             double_field: 101.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    4
+           - int_field: 151
+             double_field: 151.0
+             string_field: foo
+---
+"Basic test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_min:
+              min:
+                field: int_field
+            the_double_min:
+              min:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_min.value: 1.0 }
+  - match: { aggregations.the_double_min.value: 1.0 }
+
+---
+"Only aggs test":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_int_min:
+              min:
+                field: int_field
+            the_double_min:
+              min:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 0 }
+  - match: { aggregations.the_int_min.value: 1.0 }
+  - match: { aggregations.the_double_min.value: 1.0 }
+
+---
+"Filtered test":
+
+  - do:
+      search:
+        body:
+          query:
+            constant_score:
+              filter:
+                range:
+                  int_field:
+                    gte: 50
+          aggs:
+            the_int_min:
+              min:
+                field: int_field
+            the_double_min:
+              min:
+                field: double_field
+
+  - match: { hits.total: 3 }
+  - length: { hits.hits: 3 }
+  - match: { aggregations.the_int_min.value: 51.0 }
+  - match: { aggregations.the_double_min.value: 51.0 }
+
+
+---
+"Missing field with missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_min:
+              min:
+                field: foo
+                missing: 1
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_missing_min.value: 1.0 }
+
+---
+"Missing field without missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_min:
+              min:
+                field: foo
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - is_false: aggregations.the_missing_min.value
+
+---
+"Metadata test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_min:
+              meta:
+                foo: bar
+              min:
+                field: int_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_min.value: 1.0 }
+  - match: { aggregations.the_int_min.meta.foo: "bar" }
+
+---
+"Aggregating wrong datatype test":
+
+  - do:
+      catch: request
+      search:
+        body:
+          aggs:
+            the_string_min:
+              min:
+                field: string_field
+
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/130_sum_metric.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/130_sum_metric.yml
new file mode 100644
index 0000000000000..ae26ac7d30c7d
--- /dev/null
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/130_sum_metric.yml
@@ -0,0 +1,174 @@
+setup:
+  - do:
+      indices.create:
+          index: test_1
+          body:
+            settings:
+              number_of_replicas: 0
+            mappings:
+              test:
+                properties:
+                  int_field:
+                     type : integer
+                  double_field:
+                     type : double
+                  string_field:
+                     type: keyword
+  - do:
+       bulk:
+         refresh: true
+         body:
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    1
+           - int_field: 1
+             double_field: 1.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    2
+           - int_field: 51
+             double_field: 51.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    3
+           - int_field: 101
+             double_field: 101.0
+             string_field: foo
+           - index:
+               _index: test_1
+               _type:  test
+               _id:    4
+           - int_field: 151
+             double_field: 151.0
+             string_field: foo
+---
+"Basic test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_sum:
+              sum:
+                field: int_field
+            the_double_sum:
+              sum:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_sum.value: 304.0 }
+  - match: { aggregations.the_double_sum.value: 304.0 }
+
+---
+"Only aggs test":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_int_sum:
+              sum:
+                field: int_field
+            the_double_sum:
+              sum:
+                field: double_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 0 }
+  - match: { aggregations.the_int_sum.value: 304.0 }
+  - match: { aggregations.the_double_sum.value: 304.0 }
+
+---
+"Filtered test":
+
+  - do:
+      search:
+        body:
+          query:
+            constant_score:
+              filter:
+                range:
+                  int_field:
+                    gte: 50
+          aggs:
+            the_int_sum:
+              sum:
+                field: int_field
+            the_double_sum:
+              sum:
+                field: double_field
+
+  - match: { hits.total: 3 }
+  - length: { hits.hits: 3 }
+  - match: { aggregations.the_int_sum.value: 303.0 }
+  - match: { aggregations.the_double_sum.value: 303.0 }
+
+
+---
+"Missing field with missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_sum:
+              sum:
+                field: foo
+                missing: 1
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_missing_sum.value: 4.0 }
+
+---
+"Missing field without missing param":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_missing_sum:
+              sum:
+                field: foo
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_missing_sum.value: 0.0 }
+
+---
+"Metadata test":
+
+  - do:
+      search:
+        body:
+          aggs:
+            the_int_sum:
+              meta:
+                foo: bar
+              sum:
+                field: int_field
+
+  - match: { hits.total: 4 }
+  - length: { hits.hits: 4 }
+  - match: { aggregations.the_int_sum.value: 304.0 }
+  - match: { aggregations.the_int_sum.meta.foo: "bar" }
+
+---
+"Aggregating wrong datatype test":
+
+  - do:
+      catch: request
+      search:
+        body:
+          aggs:
+            the_string_sum:
+              sum:
+                field: string_field
+