diff --git a/pagure/api/__init__.py b/pagure/api/__init__.py
index 66727d5..37a29f7 100644
--- a/pagure/api/__init__.py
+++ b/pagure/api/__init__.py
@@ -179,19 +179,19 @@ def api_method(function):
                 APP.logger.exception(err)
 
             if err.error_code in [APIERROR.ENOCODE]:
-                response = flask.jsonify(
-                    {
+                output = {
                         'error': err.error,
                         'error_code': err.error_code.name
                     }
-                )
             else:
-                response = flask.jsonify(
-                    {
+                output = {
                         'error': err.error_code.value,
                         'error_code': err.error_code.name,
                     }
-                )
+
+            if err.errors:
+                output['errors'] = err.errors
+            response = flask.jsonify(output)
             response.status_code = err.status_code
         else:
             response = result
diff --git a/pagure/api/fork.py b/pagure/api/fork.py
index 0693e6d..9bc5083 100644
--- a/pagure/api/fork.py
+++ b/pagure/api/fork.py
@@ -549,7 +549,8 @@ def api_pull_request_add_comment(
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -691,7 +692,8 @@ def api_pull_request_add_flag(repo, requestid, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
diff --git a/pagure/api/issue.py b/pagure/api/issue.py
index 0ef30bd..d684be5 100644
--- a/pagure/api/issue.py
+++ b/pagure/api/issue.py
@@ -162,7 +162,8 @@ def api_new_issue(repo, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -621,7 +622,8 @@ def api_change_status_issue(repo, issueid, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -719,7 +721,8 @@ def api_comment_issue(repo, issueid, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -817,7 +820,8 @@ def api_assign_issue(repo, issueid, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -917,7 +921,8 @@ def api_subscribe_issue(repo, issueid, username=None, namespace=None):
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
 
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
diff --git a/pagure/api/project.py b/pagure/api/project.py
index 60cbf7b..2d0bd6f 100644
--- a/pagure/api/project.py
+++ b/pagure/api/project.py
@@ -285,7 +285,8 @@ def api_new_project():
             SESSION.rollback()
             raise pagure.exceptions.APIError(400, error_code=APIERROR.EDBERROR)
     else:
-        raise pagure.exceptions.APIError(400, error_code=APIERROR.EINVALIDREQ)
+        raise pagure.exceptions.APIError(
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
@@ -370,7 +371,7 @@ def api_fork_project():
                 400, error_code=APIERROR.EDBERROR)
     else:
         raise pagure.exceptions.APIError(
-            400, error_code=APIERROR.EINVALIDREQ)
+            400, error_code=APIERROR.EINVALIDREQ, errors=form.errors)
 
     jsonout = flask.jsonify(output)
     return jsonout
diff --git a/pagure/exceptions.py b/pagure/exceptions.py
index 8eeefc3..80ee351 100644
--- a/pagure/exceptions.py
+++ b/pagure/exceptions.py
@@ -33,10 +33,11 @@ class FileNotFoundException(PagureException):
 class APIError(PagureException):
     ''' Exception raised by the API when something goes wrong. '''
 
-    def __init__(self, status_code, error_code, error=None):
+    def __init__(self, status_code, error_code, error=None, errors=None):
         self.status_code = status_code
         self.error_code = error_code
         self.error = error
+        self.errors = errors
 
 
 class BranchNotFoundException(PagureException):
diff --git a/tests/test_pagure_flask_api_fork.py b/tests/test_pagure_flask_api_fork.py
index 291a986..acb31eb 100644
--- a/tests/test_pagure_flask_api_fork.py
+++ b/tests/test_pagure_flask_api_fork.py
@@ -636,6 +636,7 @@ class PagureFlaskApiForktests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"comment": ["This field is required."]}
             }
         )
 
@@ -748,6 +749,7 @@ class PagureFlaskApiForktests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"comment": ["This field is required."]}
             }
         )
 
diff --git a/tests/test_pagure_flask_api_issue.py b/tests/test_pagure_flask_api_issue.py
index 5c01348..d07bc11 100644
--- a/tests/test_pagure_flask_api_issue.py
+++ b/tests/test_pagure_flask_api_issue.py
@@ -70,6 +70,10 @@ class PagureFlaskApiIssuetests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {
+                "issue_content": ["This field is required."],
+                "title": ["This field is required."]
+              }
             }
         )
 
@@ -100,6 +104,10 @@ class PagureFlaskApiIssuetests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {
+                "issue_content": ["This field is required."],
+                "title": ["This field is required."]
+              }
             }
         )
 
@@ -1561,6 +1569,7 @@ class PagureFlaskApiIssuetests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"status": ["Not a valid choice"]}
             }
         )
 
@@ -1692,6 +1701,7 @@ class PagureFlaskApiIssuetests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"comment": ["This field is required."]}
             }
         )
 
@@ -2008,6 +2018,7 @@ class PagureFlaskApiIssuetests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"assignee": ["This field is required."]}
             }
         )
 
diff --git a/tests/test_pagure_flask_api_project.py b/tests/test_pagure_flask_api_project.py
index 59d0cdf..0b20353 100644
--- a/tests/test_pagure_flask_api_project.py
+++ b/tests/test_pagure_flask_api_project.py
@@ -341,6 +341,10 @@ class PagureFlaskApiProjecttests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {
+                "name": ["This field is required."],
+                "description": ["This field is required."]
+              }
             }
         )
 
@@ -358,6 +362,7 @@ class PagureFlaskApiProjecttests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"description": ["This field is required."]}
             }
         )
 
@@ -427,6 +432,7 @@ class PagureFlaskApiProjecttests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"repo": ["This field is required."]}
             }
         )
 
@@ -444,6 +450,7 @@ class PagureFlaskApiProjecttests(tests.Modeltests):
             {
               "error": "Invalid or incomplete input submited",
               "error_code": "EINVALIDREQ",
+              "errors": {"repo": ["This field is required."]}
             }
         )