diff --git a/rest-api-spec/api/explain.json b/rest-api-spec/api/explain.json
index 1d7a9c309f4..81abcc10eb6 100644
--- a/rest-api-spec/api/explain.json
+++ b/rest-api-spec/api/explain.json
@@ -72,8 +72,20 @@
         "source": {
           "type" : "string",
           "description" : "The URL-encoded query definition (instead of using the request body)"
+        },
+        "_source": {
+          "type" : "list",
+          "description" : "True or false to return the _source field or not, or a list of fields to return"
+        },
+        "_source_exclude": {
+          "type" : "list",
+          "description" : "A list of fields to exclude from the returned _source field"
+        },
+        "_source_include": {
+          "type" : "list",
+          "description" : "A list of fields to extract and return from the _source field"
         }
-      }
+      },
     },
     "body": {
       "description" : "The query definition using the Query DSL"
diff --git a/rest-api-spec/api/get.json b/rest-api-spec/api/get.json
index b1fd3ef9fa1..96498882288 100644
--- a/rest-api-spec/api/get.json
+++ b/rest-api-spec/api/get.json
@@ -47,6 +47,18 @@
         "routing": {
           "type" : "string",
           "description" : "Specific routing value"
+        },
+        "_source": {
+          "type" : "list",
+          "description" : "True or false to return the _source field or not, or a list of fields to return"
+        },
+        "_source_exclude": {
+          "type" : "list",
+          "description" : "A list of fields to exclude from the returned _source field"
+        },
+        "_source_include": {
+          "type" : "list",
+          "description" : "A list of fields to extract and return from the _source field"
         }
       }
     },
diff --git a/rest-api-spec/api/get_source.json b/rest-api-spec/api/get_source.json
index 2fa4baa1b7c..5203f2b4cd4 100644
--- a/rest-api-spec/api/get_source.json
+++ b/rest-api-spec/api/get_source.json
@@ -24,6 +24,14 @@
         }
       },
       "params": {
+        "_source_exclude": {
+          "type" : "list",
+          "description" : "A list of fields to exclude from the returned _source field"
+        },
+        "_source_include": {
+          "type" : "list",
+          "description" : "A list of fields to extract and return from the _source field"
+        },
         "parent": {
           "type" : "string",
           "description" : "The ID of the parent document"
diff --git a/rest-api-spec/api/mget.json b/rest-api-spec/api/mget.json
index f4872e45737..a875136db9f 100644
--- a/rest-api-spec/api/mget.json
+++ b/rest-api-spec/api/mget.json
@@ -31,6 +31,18 @@
         "refresh": {
           "type" : "boolean",
           "description" : "Refresh the shard containing the document before performing the operation"
+        },
+        "_source": {
+          "type" : "list",
+          "description" : "True or false to return the _source field or not, or a list of fields to return"
+        },
+        "_source_exclude": {
+          "type" : "list",
+          "description" : "A list of fields to exclude from the returned _source field"
+        },
+        "_source_include": {
+          "type" : "list",
+          "description" : "A list of fields to extract and return from the _source field"
         }
       }
     },
diff --git a/rest-api-spec/api/search.json b/rest-api-spec/api/search.json
index af778d5ef58..90fab84dec1 100644
--- a/rest-api-spec/api/search.json
+++ b/rest-api-spec/api/search.json
@@ -98,6 +98,18 @@
           "type" : "string",
           "description" : "The URL-encoded request definition using the Query DSL (instead of using request body)"
         },
+        "_source": {
+          "type" : "list",
+          "description" : "True or false to return the _source field or not, or a list of fields to return"
+        },
+        "_source_exclude": {
+          "type" : "list",
+          "description" : "A list of fields to exclude from the returned _source field"
+        },
+        "_source_include": {
+          "type" : "list",
+          "description" : "A list of fields to extract and return from the _source field"
+        },
         "stats": {
           "type" : "list",
           "description" : "Specific 'tag' of the request for logging and statistical purposes"
diff --git a/rest-api-spec/test/explain/10_source_filtering.yaml b/rest-api-spec/test/explain/20_source_filtering.yaml
similarity index 100%
rename from rest-api-spec/test/explain/10_source_filtering.yaml
rename to rest-api-spec/test/explain/20_source_filtering.yaml
diff --git a/rest-api-spec/test/get_source/70_source_filtering.yaml b/rest-api-spec/test/get_source/70_source_filtering.yaml
index 71c36fe3f4c..5d6c0ad0512 100644
--- a/rest-api-spec/test/get_source/70_source_filtering.yaml
+++ b/rest-api-spec/test/get_source/70_source_filtering.yaml
@@ -12,18 +12,18 @@
         body:   { "include": { "field1": "v1", "field2": "v2" }, "count": 1 }
 
   - do:
-      get_source: { index:  test_1, type: test, id: 1, include: include.field1 }
+      get_source: { index:  test_1, type: test, id: 1, _source_include: include.field1 }
   - match:  { include.field1: v1 }
   - is_false: include.field2
 
   - do:
-      get_source: { index:  test_1, type: test, id: 1, include: "include.field1,include.field2" }
+      get_source: { index:  test_1, type: test, id: 1, _source_include: "include.field1,include.field2" }
   - match:  { include.field1: v1 }
   - match:  { include.field2: v2 }
   - is_false: count
 
   - do:
-      get_source: { index:  test_1, type: test, id: 1, include: include, exclude: "*.field2" }
+      get_source: { index:  test_1, type: test, id: 1, _source_include: include, _source_exclude: "*.field2" }
   - match:  { include.field1: v1 }
   - is_false: include.field2
   - is_false: count