diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1d08de6..a61d5faf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 Note that in line with [Django REST framework policy](https://www.django-rest-framework.org/topics/release-notes/),
 any parts of the framework not mentioned in the documentation should generally be considered private API, and may be subject to change.
 
+## [Unreleased]
+
+### Added
+
+* Added `429 Too Many Requests` as a possible error response in the OpenAPI schema.
+
 ## [7.0.0] - 2024-05-02
 
 ### Added
diff --git a/example/tests/__snapshots__/test_openapi.ambr b/example/tests/__snapshots__/test_openapi.ambr
index 1de8057b..f72c6ff8 100644
--- a/example/tests/__snapshots__/test_openapi.ambr
+++ b/example/tests/__snapshots__/test_openapi.ambr
@@ -68,6 +68,16 @@
           }
         },
         "description": "[Resource does not exist](https://jsonapi.org/format/#crud-deleting-responses-404)"
+      },
+      "429": {
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "$ref": "#/components/schemas/failure"
+            }
+          }
+        },
+        "description": "too many requests"
       }
     },
     "tags": [
@@ -264,6 +274,16 @@
           }
         },
         "description": "[Conflict]([Conflict](https://jsonapi.org/format/#crud-updating-responses-409)"
+      },
+      "429": {
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "$ref": "#/components/schemas/failure"
+            }
+          }
+        },
+        "description": "too many requests"
       }
     },
     "tags": [
@@ -399,6 +419,16 @@
           }
         },
         "description": "not found"
+      },
+      "429": {
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "$ref": "#/components/schemas/failure"
+            }
+          }
+        },
+        "description": "too many requests"
       }
     },
     "tags": [
@@ -546,6 +576,16 @@
           }
         },
         "description": "not found"
+      },
+      "429": {
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "$ref": "#/components/schemas/failure"
+            }
+          }
+        },
+        "description": "too many requests"
       }
     },
     "tags": [
@@ -754,6 +794,16 @@
           }
         },
         "description": "[Conflict](https://jsonapi.org/format/#crud-creating-responses-409)"
+      },
+      "429": {
+        "content": {
+          "application/vnd.api+json": {
+            "schema": {
+              "$ref": "#/components/schemas/failure"
+            }
+          }
+        },
+        "description": "too many requests"
       }
     },
     "tags": [
@@ -1341,6 +1391,16 @@
                 }
               },
               "description": "not found"
+            },
+            "429": {
+              "content": {
+                "application/vnd.api+json": {
+                  "schema": {
+                    "$ref": "#/components/schemas/failure"
+                  }
+                }
+              },
+              "description": "too many requests"
             }
           },
           "tags": [
diff --git a/rest_framework_json_api/schemas/openapi.py b/rest_framework_json_api/schemas/openapi.py
index 650876e6..b44ce7a4 100644
--- a/rest_framework_json_api/schemas/openapi.py
+++ b/rest_framework_json_api/schemas/openapi.py
@@ -807,6 +807,7 @@ def _add_generic_failure_responses(self, operation):
         for code, reason in [
             ("400", "bad request"),
             ("401", "not authorized"),
+            ("429", "too many requests"),
         ]:
             operation["responses"][code] = self._failure_response(reason)