> For the complete documentation index, see [llms.txt](https://docs.zenlytic.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zenlytic.com/developers/api-reference/workspace-administration/groups/group-members/add-group-member.md).

# Add Group Member

Add a user to the group.

Returns 404 if `user_id` is not already a member of the workspace.

Returns 409 if the user is already in the group.

Returns 400 if the group is the built-in "All Users" group, whose membership always tracks the workspace roster instead and can't be modified directly.

```json
{"openapi":"3.1.0","info":{"title":"FastAPI","version":"2.0.0"},"tags":[{"name":"Group Members"}],"servers":[{"url":"https://api-external.zenlytic.com/api/v2","description":"US"},{"url":"https://euapi-external.zenlytic.com/api/v2","description":"EU"}],"security":[{"HTTPBearer":[]}],"components":{"securitySchemes":{"HTTPBearer":{"type":"http","description":"A Personal Access Token (PAT).","scheme":"bearer"}},"schemas":{"AddGroupMemberSchema":{"properties":{"user_id":{"type":"string","title":"User Id"}},"type":"object","required":["user_id"],"title":"AddGroupMemberSchema"},"ApiV2Response_GroupResponseSchema_":{"properties":{"data":{"$ref":"#/components/schemas/GroupResponseSchema"},"meta":{"$ref":"#/components/schemas/MetaSchema"}},"type":"object","required":["data","meta"],"title":"ApiV2Response[GroupResponseSchema]"},"GroupResponseSchema":{"properties":{"id":{"type":"string","title":"Id"},"workspace_id":{"type":"string","title":"Workspace Id"},"name":{"type":"string","title":"Name"},"is_all_users":{"type":"boolean","title":"Is All Users","description":"Whether this is the built-in group containing every workspace member; its membership always tracks the roster and can't be edited directly."},"user_attribute_precedence":{"type":"integer","title":"User Attribute Precedence","description":"Determines which group's value wins when a member is in several groups that set the same user attribute; higher wins."},"users":{"items":{"type":"string"},"type":"array","title":"Users","description":"IDs of the group's members."}},"type":"object","required":["id","workspace_id","name","is_all_users","user_attribute_precedence","users"],"title":"GroupResponseSchema"},"MetaSchema":{"properties":{"status":{"$ref":"#/components/schemas/ResponseStatus"},"errors":{"items":{"$ref":"#/components/schemas/ErrorSchema"},"type":"array","title":"Errors","description":"Non-empty exactly when `status` is \"error\"."},"warnings":{"items":{"$ref":"#/components/schemas/WarningSchema"},"type":"array","title":"Warnings","description":"Can be non-empty even when `status` is \"success\" - a non-fatal issue with an otherwise-successful request."}},"type":"object","required":["status"],"title":"MetaSchema"},"ResponseStatus":{"type":"string","enum":["success","error"],"title":"ResponseStatus"},"ErrorSchema":{"properties":{"message":{"type":"string","title":"Message"},"status_code":{"anyOf":[{"type":"integer"},{"type":"null"}],"title":"Status Code","description":"Matches this response's actual HTTP status code."},"occurred_at":{"anyOf":[{"type":"string"},{"type":"null"}],"title":"Occurred At","description":"ISO 8601 UTC timestamp."},"error_code":{"anyOf":[{"type":"string"},{"type":"null"}],"title":"Error Code","description":"Machine-readable code for errors that need special handling (e.g. \"SSO_REQUIRED\") rather than being shown generically; null for most errors."},"error_metadata":{"anyOf":[{"$ref":"#/components/schemas/BaseErrorMetadata"},{"type":"null"}],"description":"Additional structured detail for specific error conditions; usually null."}},"type":"object","required":["message"],"title":"ErrorSchema"},"BaseErrorMetadata":{"properties":{},"type":"object","title":"BaseErrorMetadata"},"WarningSchema":{"properties":{"message":{"type":"string","title":"Message"}},"type":"object","required":["message"],"title":"WarningSchema"},"ApiV2ErrorResponse":{"properties":{"meta":{"$ref":"#/components/schemas/MetaSchema"}},"type":"object","required":["meta"],"title":"ApiV2ErrorResponse"}}},"paths":{"/workspaces/{workspace_id}/groups/{group_id}/members":{"post":{"tags":["Group Members"],"summary":"Add Group Member","description":"Add a user to the group.\n\nReturns 404 if ``user_id`` is not already a member of the workspace.\n\nReturns 409 if the user is already in the group.\n\nReturns 400 if the group is the built-in \"All Users\" group, whose membership always\ntracks the workspace roster instead and can't be modified directly.","operationId":"add_group_member_workspaces__workspace_id__groups__group_id__members_post","parameters":[{"name":"workspace_id","in":"path","required":true,"schema":{"type":"string","title":"Workspace Id"}},{"name":"group_id","in":"path","required":true,"schema":{"type":"string","title":"Group Id"}}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/AddGroupMemberSchema"}}}},"responses":{"201":{"description":"Successful Response","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApiV2Response_GroupResponseSchema_"}}}},"4XX":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApiV2ErrorResponse"}}},"description":"Client Error"},"5XX":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApiV2ErrorResponse"}}},"description":"Server Error"}}}}}}
```


---

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