diff --git a/api-reference/openapi.json b/api-reference/openapi.json
index 5bf00d1..bdba801 100644
--- a/api-reference/openapi.json
+++ b/api-reference/openapi.json
@@ -2528,9 +2528,6 @@
             "in": "header",
             "schema": {
               "type": "string",
-              "enum": [
-                "text/tab-separated-values"
-              ],
               "default": "text/tab-separated-values"
             },
             "description": "The requested format of the returned glossary entries. Currently, supports only `text/tab-separated-values`.",
@@ -2707,6 +2704,30 @@
                 }
               }
             }
+          },
+          "400": {
+            "$ref": "#/components/responses/BadRequest"
+          },
+          "403": {
+            "$ref": "#/components/responses/Forbidden"
+          },
+          "413": {
+            "$ref": "#/components/responses/PayloadTooLarge"
+          },
+          "415": {
+            "description": "Unsupported Content-Type. Use `application/json` or `application/x-www-form-urlencoded`."
+          },
+          "429": {
+            "$ref": "#/components/responses/TooManyRequests"
+          },
+          "456": {
+            "$ref": "#/components/responses/QuotaExceeded"
+          },
+          "500": {
+            "$ref": "#/components/responses/InternalServerError"
+          },
+          "504": {
+            "$ref": "#/components/responses/ServiceUnavailable"
           }
         },
         "security": [
diff --git a/api-reference/openapi.yaml b/api-reference/openapi.yaml
index 8edf293..79be3e3 100644
--- a/api-reference/openapi.yaml
+++ b/api-reference/openapi.yaml
@@ -1781,8 +1781,6 @@ paths:
           in: header
           schema:
             type: string
-            enum:
-              - text/tab-separated-values
             default: text/tab-separated-values
           description: The requested format of the returned glossary entries. Currently,
             supports only `text/tab-separated-values`.
@@ -1901,6 +1899,22 @@ paths:
                           description: The improved text.
                           type: string
                           example: This is a sample sentence to improve.
+        400:
+          $ref: '#/components/responses/BadRequest'
+        403:
+          $ref: '#/components/responses/Forbidden'
+        413:
+          $ref: '#/components/responses/PayloadTooLarge'
+        415:
+          description: Unsupported Content-Type. Use `application/json` or `application/x-www-form-urlencoded`.
+        429:
+          $ref: '#/components/responses/TooManyRequests'
+        456:
+          $ref: '#/components/responses/QuotaExceeded'
+        500:
+          $ref: '#/components/responses/InternalServerError'
+        504:
+          $ref: '#/components/responses/ServiceUnavailable'
       security:
         - auth_header: [ ]
   /v2/write/correct: