{"message":"Campaign KPI Dashboard API","version":"1.1.0","endpoints":{"kpi_messages_sent":"/kpi/messages_sent - Get messages sent KPI","kpi_delivery_rate":"/kpi/delivery_rate - Get delivery rate KPI","kpi_read_rate":"/kpi/read_rate - Get read rate KPI","kpi_failure_rate":"/kpi/failure_rate - Get failure rate KPI","kpi_remaining_credit":"/kpi/remaining_credit - Get remaining credit KPI","kpi_active_campaigns":"/kpi/active_campaigns - Get active campaigns KPI","filters":"/filters - Get date-filtered selector values","charts":"/charts/* - Get date-filtered chart data","health":"/health - Health check","documentation":"/docs - Interactive API documentation"}}