diff --git a/doc/api/commits.md b/doc/api/commits.md
index 55d0de7afd9..682151d4b1d 100644
--- a/doc/api/commits.md
+++ b/doc/api/commits.md
@@ -10,7 +10,7 @@ GET /projects/:id/repository/commits
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `ref_name` | string | no | The name of a repository branch or tag or if not given the default branch |
 | `since` | string | no | Only commits after or in this date will be returned in ISO 8601 format YYYY-MM-DDTHH:MM:SSZ |
 | `until` | string | no | Only commits before or in this date will be returned in ISO 8601 format YYYY-MM-DDTHH:MM:SSZ |
@@ -58,7 +58,7 @@ Parameters:
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha` | string | yes | The commit hash or name of a repository branch or tag |
 
 ```bash
@@ -102,7 +102,7 @@ Parameters:
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha` | string | yes | The commit hash or name of a repository branch or tag |
 
 ```bash
@@ -138,7 +138,7 @@ Parameters:
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha` | string | yes | The commit hash or name of a repository branch or tag |
 
 ```bash
@@ -187,7 +187,7 @@ POST /projects/:id/repository/commits/:sha/comments
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha`       | string  | yes | The commit SHA or name of a repository branch or tag |
 | `note`      | string  | yes | The text of the comment |
 | `path`      | string  | no  | The file path relative to the repository |
@@ -232,7 +232,7 @@ GET /projects/:id/repository/commits/:sha/statuses
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha`     | string  | yes | The commit SHA
 | `ref_name`| string  | no  | The name of a repository branch or tag or, if not given, the default branch
 | `stage`   | string  | no  | Filter by [build stage](../ci/yaml/README.md#stages), e.g., `test`
@@ -306,7 +306,7 @@ POST /projects/:id/statuses/:sha
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
+| `id`      | integer/string | yes | The ID of a project or NAMESPACE/PROJECT_NAME owned by the authenticated user
 | `sha`     | string  | yes   | The commit SHA
 | `state`   | string  | yes   | The state of the status. Can be one of the following: `pending`, `running`, `success`, `failed`, `canceled`
 | `ref`     | string  | no    | The `ref` (branch or tag) to which the status refers
diff --git a/doc/api/projects.md b/doc/api/projects.md
index 0d5aa61aa74..a62aaee14d7 100644
--- a/doc/api/projects.md
+++ b/doc/api/projects.md
@@ -535,7 +535,7 @@ POST /projects/:id/star
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `id`      | integer/string | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
 
 ```bash
 curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/5/star"
@@ -602,7 +602,7 @@ DELETE /projects/:id/star
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `id`      | integer/string | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
 
 ```bash
 curl --request DELETE --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/5/star"
@@ -673,7 +673,7 @@ POST /projects/:id/archive
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `id`      | integer/string | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
 
 ```bash
 curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/archive"
@@ -760,7 +760,7 @@ POST /projects/:id/unarchive
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `id`      | integer/string | yes | The ID of the project or NAMESPACE/PROJECT_NAME |
 
 ```bash
 curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/unarchive"