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Invites a new user by email to join a group or project.
```plaintext
POST /groups/:id/invitations
POST /projects/:id/invitations
```
| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id` | integer/string | yes | The ID or [URL-encoded path of the project or group](README.md#namespaced-path-encoding) owned by the authenticated user |
| `email` | integer/string | yes | The email of the new member or multiple emails separated by commas |
| `expires_at` | string | no | A date string in the format YEAR-MONTH-DAY |
```shell
curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --data "email=test@example.com&access_level=30" "https://gitlab.example.com/api/v4/groups/:id/invitations"
curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --data "email=test@example.com&access_level=30" "https://gitlab.example.com/api/v4/projects/:id/invitations"
```
Example responses:
When all emails were successfully sent:
```json
{ "status": "success" }
```
When there was any error sending the email:
```json
{
"status": "error",
"message": {
"test@example.com": "Already invited",
"test2@example.com": "Member already exsists"
}
}
```
## List all invitations pending for a group or project
Gets a list of invited group or project members viewable by the authenticated user.
Returns invitations to direct members only, and not through inherited ancestors' groups.
This function takes pagination parameters `page` and `per_page` to restrict the list of users.
```plaintext
GET /groups/:id/invitations
GET /projects/:id/invitations
```
| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id` | integer/string | yes | The ID or [URL-encoded path of the project or group](README.md#namespaced-path-encoding) owned by the authenticated user |
| `page` | integer | no | Page to retrieve |
| `per_page`| integer | no | Number of member invitations to return per page |
| `query` | string | no | A query string to search for invited members by invite email. Query text must match email address exactly. When empty, returns all invitations. |