| `due_date` | string | no | Return issues that have no due date, are overdue, or whose due date is this week, this month, or between two weeks ago and next month. Accepts: `0` (no due date), `overdue`, `week`, `month`, `next_month_and_previous_two_weeks`. _(Introduced in [GitLab 13.3](https://gitlab.com/gitlab-org/gitlab/-/issues/233420))_ |
| `due_date` | string | no | Return issues that have no due date, are overdue, or whose due date is this week, this month, or between two weeks ago and next month. Accepts: `0` (no due date), `overdue`, `week`, `month`, `next_month_and_previous_two_weeks`. _(Introduced in [GitLab 13.3](https://gitlab.com/gitlab-org/gitlab/-/issues/233420))_ |
| `iids[]` | integer array | no | Return only the issues having the given `iid` |
| `iids[]` | integer array | no | Return only the issues having the given `iid` |
| `in` | string | no | Modify the scope of the `search` attribute. `title`, `description`, or a string joining them with comma. Default is `title,description` |
| `in` | string | no | Modify the scope of the `search` attribute. `title`, `description`, or a string joining them with comma. Default is `title,description` |
| `iteration_id`**(STARTER)** | integer | no | Return issues assigned to the given iteration ID. `None` returns issues that do not belong to an iteration. `Any` returns issues that belong to an iteration. Mutually exclusive with `iteration_title`. _([Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/118742) in [GitLab Starter](https://about.gitlab.com/pricing/) 13.6)_ |
| `iteration_id`**(PREMIUM)** | integer | no | Return issues assigned to the given iteration ID. `None` returns issues that do not belong to an iteration. `Any` returns issues that belong to an iteration. Mutually exclusive with `iteration_title`. _([Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/118742) in GitLab 13.6)_ |
| `iteration_title`**(STARTER)** | string | no | Return issues assigned to the iteration with the given title. Similar to `iteration_id` and mutually exclusive with `iteration_id`. _([Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/118742) in [GitLab Starter](https://about.gitlab.com/pricing/) 13.6)_ |
| `iteration_title`**(PREMIUM)** | string | no | Return issues assigned to the iteration with the given title. Similar to `iteration_id` and mutually exclusive with `iteration_id`. _([Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/118742) in GitLab 13.6)_ |
| `milestone` | string | no | The milestone title. `None` lists all issues with no milestone. `Any` lists all issues that have an assigned milestone. |
| `milestone` | string | no | The milestone title. `None` lists all issues with no milestone. `Any` lists all issues that have an assigned milestone. |
| `labels` | string | no | Comma-separated list of label names, issues must have all labels to be returned. `None` lists all issues with no labels. `Any` lists all issues with at least one label. `No+Label` (Deprecated) lists all issues with no labels. Predefined names are case-insensitive. |
| `labels` | string | no | Comma-separated list of label names, issues must have all labels to be returned. `None` lists all issues with no labels. `Any` lists all issues with at least one label. `No+Label` (Deprecated) lists all issues with no labels. Predefined names are case-insensitive. |
| `milestone` | string | no | The milestone title. `None` lists all issues with no milestone. `Any` lists all issues that have an assigned milestone. |
| `milestone` | string | no | The milestone title. `None` lists all issues with no milestone. `Any` lists all issues that have an assigned milestone. |
