Add Permission Group Member

Assign an organization member to a permission group. An existing assignment or membership in another group targeting the same workspace returns a conflict. Requires organization admin or owner access and active Access Control. Workspace API keys return 403; use a personal API key or scoped OAuth token.

OAuth scope: api:write.

POST/api/v2/organizations/{organizationId}/permission-groups/{groupId}/members

Authorization

X-API-Key<token>

Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.

In: header

Path Parameters

organizationId*string

Organization that owns the permission groups.

Length1 <= length
groupId*string

Permission group identifier.

Length1 <= length

Request Body

application/json

Add Permission Group Member inputs.

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://www.sim.ai/api/v2/organizations/string/permission-groups/string/members" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "userId": "user-123"  }'
{
  "data": {
    "id": "assignment-123",
    "permissionGroupId": "group-123",
    "organizationId": "org-123",
    "userId": "user-123",
    "assignedBy": "admin-123",
    "assignedAt": "2026-06-01T09:00:00.000Z"
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "The request conflicts with the current state of the resource"
  }
}
{
  "error": {
    "code": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "UNSUPPORTED_MEDIA_TYPE",
    "message": "Request body must be sent as application/json"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}
PATCHUpdate Organization MemberPOSTBulk Add Permission Group Members