diff --git a/api/src/main/scala/com/lbs/api/LuxmedApi.scala b/api/src/main/scala/com/lbs/api/LuxmedApi.scala
index 235dd9f..689c3cc 100644
--- a/api/src/main/scala/com/lbs/api/LuxmedApi.scala
+++ b/api/src/main/scala/com/lbs/api/LuxmedApi.scala
@@ -4,18 +4,21 @@ package com.lbs.api
 import java.time.ZonedDateTime
 import java.time.format.DateTimeFormatter
 
+import cats.implicits.toFunctorOps
 import com.lbs.api.ApiResponseMutators._
 import com.lbs.api.http._
 import com.lbs.api.http.headers._
 import com.lbs.api.json.JsonSerializer.extensions._
-import com.lbs.api.json.model._
+import com.lbs.api.json.model.{AvailableTermsResponse, ReservationFilterResponse, ReservedVisitsResponse, VisitsHistoryResponse, _}
 import scalaj.http.{HttpRequest, HttpResponse}
 
-object LuxmedApi extends ApiBase {
+import scala.language.higherKinds
+
+class LuxmedApi[F[_] : ThrowableMonad] extends ApiBase {
 
   private val dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
 
-  def login(username: String, password: String, clientId: String = "iPhone"): Either[Throwable, LoginResponse] = {
+  def login(username: String, password: String, clientId: String = "iPhone"): F[LoginResponse] = {
     val request = http("token").
       header(`Content-Type`, "application/x-www-form-urlencoded").
       header(`x-api-client-identifier`, clientId).
@@ -26,7 +29,7 @@ object LuxmedApi extends ApiBase {
     post[LoginResponse](request)
   }
 
-  def refreshToken(refreshToken: String, clientId: String = "iPhone"): Either[Throwable, LoginResponse] = {
+  def refreshToken(refreshToken: String, clientId: String = "iPhone"): F[LoginResponse] = {
     val request = http("token").
       header(`Content-Type`, "application/x-www-form-urlencoded").
       header(`x-api-client-identifier`, clientId).
@@ -37,7 +40,7 @@ object LuxmedApi extends ApiBase {
   }
 
   def reservedVisits(accessToken: String, tokenType: String, fromDate: ZonedDateTime = ZonedDateTime.now(),
-                     toDate: ZonedDateTime = ZonedDateTime.now().plusMonths(3)): Either[Throwable, ReservedVisitsResponse] = {
+                     toDate: ZonedDateTime = ZonedDateTime.now().plusMonths(3)): F[ReservedVisitsResponse] = {
     val request = http("visits/reserved").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken").
@@ -47,7 +50,7 @@ object LuxmedApi extends ApiBase {
   }
 
   def visitsHistory(accessToken: String, tokenType: String, fromDate: ZonedDateTime = ZonedDateTime.now().minusYears(1),
-                    toDate: ZonedDateTime = ZonedDateTime.now(), page: Int = 1, pageSize: Int = 100): Either[Throwable, VisitsHistoryResponse] = {
+                    toDate: ZonedDateTime = ZonedDateTime.now(), page: Int = 1, pageSize: Int = 100): F[VisitsHistoryResponse] = {
     val request = http("visits/history").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken").
@@ -60,7 +63,7 @@ object LuxmedApi extends ApiBase {
 
   def reservationFilter(accessToken: String, tokenType: String, fromDate: ZonedDateTime = ZonedDateTime.now(),
                         toDate: Option[ZonedDateTime] = None, cityId: Option[Long] = None, clinicId: Option[Long] = None,
-                        serviceId: Option[Long] = None): Either[Throwable, ReservationFilterResponse] = {
+                        serviceId: Option[Long] = None): F[ReservationFilterResponse] = {
     val request = http("visits/available-terms/reservation-filter").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken").
@@ -74,7 +77,7 @@ object LuxmedApi extends ApiBase {
 
   def availableTerms(accessToken: String, tokenType: String, payerId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long, doctorId: Option[Long],
                      fromDate: ZonedDateTime = ZonedDateTime.now(), toDate: Option[ZonedDateTime] = None, timeOfDay: Int = 0,
-                     languageId: Long = 10, findFirstFreeTerm: Boolean = false): Either[Throwable, AvailableTermsResponse] = {
+                     languageId: Long = 10, findFirstFreeTerm: Boolean = false): F[AvailableTermsResponse] = {
     val request = http("visits/available-terms").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken").
@@ -91,35 +94,35 @@ object LuxmedApi extends ApiBase {
     get[AvailableTermsResponse](request).mutate
   }
 
-  def temporaryReservation(accessToken: String, tokenType: String, temporaryReservationRequest: TemporaryReservationRequest): Either[Throwable, TemporaryReservationResponse] = {
+  def temporaryReservation(accessToken: String, tokenType: String, temporaryReservationRequest: TemporaryReservationRequest): F[TemporaryReservationResponse] = {
     val request = http("visits/temporary-reservation").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     post[TemporaryReservationResponse](request, bodyOpt = Some(temporaryReservationRequest))
   }
 
-  def deleteTemporaryReservation(accessToken: String, tokenType: String, temporaryReservationId: Long): Either[Throwable, HttpResponse[String]] = {
+  def deleteTemporaryReservation(accessToken: String, tokenType: String, temporaryReservationId: Long): F[HttpResponse[String]] = {
     val request = http(s"visits/temporary-reservation/$temporaryReservationId").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     delete(request)
   }
 
-  def valuations(accessToken: String, tokenType: String, valuationsRequest: ValuationsRequest): Either[Throwable, ValuationsResponse] = {
+  def valuations(accessToken: String, tokenType: String, valuationsRequest: ValuationsRequest): F[ValuationsResponse] = {
     val request = http("visits/available-terms/valuations").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     post[ValuationsResponse](request, bodyOpt = Some(valuationsRequest))
   }
 
-  def reservation(accessToken: String, tokenType: String, reservationRequest: ReservationRequest): Either[Throwable, ReservationResponse] = {
+  def reservation(accessToken: String, tokenType: String, reservationRequest: ReservationRequest): F[ReservationResponse] = {
     val request = http("visits/reserved").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     post[ReservationResponse](request, bodyOpt = Some(reservationRequest))
   }
 
-  def deleteReservation(accessToken: String, tokenType: String, reservationId: Long): Either[Throwable, HttpResponse[String]] = {
+  def deleteReservation(accessToken: String, tokenType: String, reservationId: Long): F[HttpResponse[String]] = {
     val request = http(s"visits/reserved/$reservationId").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
@@ -127,63 +130,63 @@ object LuxmedApi extends ApiBase {
   }
 
   //204 means OK?
-  def canTermBeChanged(accessToken: String, tokenType: String, reservationId: Long): Either[Throwable, HttpResponse[String]] = {
+  def canTermBeChanged(accessToken: String, tokenType: String, reservationId: Long): F[HttpResponse[String]] = {
     val request = http(s"visits/reserved/$reservationId/can-term-be-changed").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
-    request.toEither
+    request.invoke
   }
 
-  def detailToChangeTerm(accessToken: String, tokenType: String, reservationId: Long): Either[Throwable, ChangeTermDetailsResponse] = {
+  def detailToChangeTerm(accessToken: String, tokenType: String, reservationId: Long): F[ChangeTermDetailsResponse] = {
     val request = http(s"visits/reserved/$reservationId/details-to-change-term").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     get[ChangeTermDetailsResponse](request)
   }
 
-  def temporaryReservationToChangeTerm(accessToken: String, tokenType: String, reservationId: Long, temporaryReservationRequest: TemporaryReservationRequest): Either[Throwable, TemporaryReservationResponse] = {
+  def temporaryReservationToChangeTerm(accessToken: String, tokenType: String, reservationId: Long, temporaryReservationRequest: TemporaryReservationRequest): F[TemporaryReservationResponse] = {
     val request = http(s"visits/reserved/$reservationId/temporary-reservation-to-change-term").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     post[TemporaryReservationResponse](request, bodyOpt = Some(temporaryReservationRequest))
   }
 
-  def valuationToChangeTerm(accessToken: String, tokenType: String, reservationId: Long, valuationsRequest: ValuationsRequest): Either[Throwable, ValuationsResponse] = {
+  def valuationToChangeTerm(accessToken: String, tokenType: String, reservationId: Long, valuationsRequest: ValuationsRequest): F[ValuationsResponse] = {
     val request = http(s"visits/reserved/$reservationId/valuations-to-change-term").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     post[ValuationsResponse](request, bodyOpt = Some(valuationsRequest))
   }
 
-  def changeTerm(accessToken: String, tokenType: String, reservationId: Long, reservationRequest: ReservationRequest): Either[Throwable, ChangeTermResponse] = {
+  def changeTerm(accessToken: String, tokenType: String, reservationId: Long, reservationRequest: ReservationRequest): F[ChangeTermResponse] = {
     val request = http(s"visits/reserved/$reservationId/term").
       header(`Content-Type`, "application/json").
       header(Authorization, s"$tokenType $accessToken")
     put[ChangeTermResponse](request, bodyOpt = Some(reservationRequest))
   }
 
-  private def get[T <: SerializableJsonObject](request: HttpRequest)(implicit mf: scala.reflect.Manifest[T]): Either[Throwable, T] = {
-    request.toEither.map(_.body.as[T])
+  private def get[T <: SerializableJsonObject](request: HttpRequest)(implicit mf: scala.reflect.Manifest[T]): F[T] = {
+    request.invoke.map(_.body.as[T])
   }
 
-  private def post[T <: SerializableJsonObject](request: HttpRequest, bodyOpt: Option[SerializableJsonObject] = None)(implicit mf: scala.reflect.Manifest[T]): Either[Throwable, T] = {
+  private def post[T <: SerializableJsonObject](request: HttpRequest, bodyOpt: Option[SerializableJsonObject] = None)(implicit mf: scala.reflect.Manifest[T]): F[T] = {
     val postRequest = bodyOpt match {
       case Some(body) => request.postData(body.asJson)
       case None => request.postForm
     }
-    postRequest.toEither.map(_.body.as[T])
+    postRequest.invoke.map(_.body.as[T])
   }
 
-  private def put[T <: SerializableJsonObject](request: HttpRequest, bodyOpt: Option[SerializableJsonObject] = None)(implicit mf: scala.reflect.Manifest[T]): Either[Throwable, T] = {
+  private def put[T <: SerializableJsonObject](request: HttpRequest, bodyOpt: Option[SerializableJsonObject] = None)(implicit mf: scala.reflect.Manifest[T]): F[T] = {
     val putRequest = bodyOpt match {
       case Some(body) => request.put(body.asJson)
       case None => request.method("PUT")
     }
-    putRequest.toEither.map(_.body.as[T])
+    putRequest.invoke.map(_.body.as[T])
   }
 
-  private def delete(request: HttpRequest): Either[Throwable, HttpResponse[String]] = {
-    request.postForm.method("DELETE").toEither
+  private def delete(request: HttpRequest): F[HttpResponse[String]] = {
+    request.postForm.method("DELETE").invoke
   }
 
 }
diff --git a/api/src/main/scala/com/lbs/api/exception/GenericException.scala b/api/src/main/scala/com/lbs/api/exception/GenericException.scala
index 9038211..457c075 100644
--- a/api/src/main/scala/com/lbs/api/exception/GenericException.scala
+++ b/api/src/main/scala/com/lbs/api/exception/GenericException.scala
@@ -1,6 +1,6 @@
 
 package com.lbs.api.exception
 
-class GenericException(val code: Int, val status: String, val message: String) extends ApiException(message) {
-  override def toString: String = s"Code: $code, status: $status, message: $message"
+case class GenericException(code: Int, message: String) extends ApiException(message) {
+  override def toString: String = s"Code: $code, message: $message"
 }
diff --git a/api/src/main/scala/com/lbs/api/http/package.scala b/api/src/main/scala/com/lbs/api/http/package.scala
index 8d716e1..f699491 100644
--- a/api/src/main/scala/com/lbs/api/http/package.scala
+++ b/api/src/main/scala/com/lbs/api/http/package.scala
@@ -1,14 +1,16 @@
 
 package com.lbs.api
 
-import com.lbs.api.exception.{ApiException, GenericException, InvalidLoginOrPasswordException, ServiceIsAlreadyBookedException, SessionExpiredException}
+import cats.MonadError
+import cats.implicits._
+import com.lbs.api.exception._
 import com.lbs.api.json.JsonSerializer.extensions._
 import com.lbs.api.json.model._
 import com.lbs.common.Logger
 import scalaj.http.{HttpRequest, HttpResponse}
 
-import scala.concurrent.{ExecutionContext, Future}
-import scala.util.{Failure, Try}
+import scala.language.higherKinds
+import scala.util.{Failure, Success, Try}
 
 package object http extends Logger {
 
@@ -29,25 +31,25 @@ package object http extends Logger {
     def asEntity[T <: SerializableJsonObject](implicit mf: scala.reflect.Manifest[T]): HttpResponse[T] = {
       httpResponse.copy(body = httpResponse.body.as[T])
     }
-
-    def asEntityAsync[T <: SerializableJsonObject](implicit mf: scala.reflect.Manifest[T], ec: ExecutionContext): Future[HttpResponse[T]] = {
-      Future(asEntity[T])
-    }
   }
 
-  implicit class ExtendedHttpRequest(httpRequest: HttpRequest) {
-
-    def toEither: Either[Throwable, HttpResponse[String]] = {
-      toTry.toEither
-    }
-
-    def toTry: Try[HttpResponse[String]] = {
+  implicit class ExtendedHttpRequest[F[_] : ThrowableMonad](httpRequest: HttpRequest) {
+    def invoke: F[HttpResponse[String]] = {
+      val me = MonadError[F, Throwable]
       debug(s"Sending request:\n${hidePasswords(httpRequest)}")
-      val httpResponse = Try(httpRequest.asString)
+      val httpResponse = me.pure(httpRequest.asString)
       debug(s"Received response:\n$httpResponse")
-      extractLuxmedError(httpResponse) match {
-        case Some(error) => Failure(error)
-        case None => httpResponse.map(_.throwError)
+
+      httpResponse.flatMap { response =>
+        val errorMaybe = extractLuxmedError(response)
+        errorMaybe match {
+          case Some(error) => me.raiseError(error)
+          case None =>
+            Try(response.throwError) match {
+              case Failure(error) => me.raiseError(error)
+              case Success(value) => me.pure(value)
+            }
+        }
       }
     }
 
@@ -55,8 +57,8 @@ package object http extends Logger {
       value.map(v => httpRequest.param(key, v)).getOrElse(httpRequest)
     }
 
-    private def luxmedErrorToApiException[T <: LuxmedBaseError](ler: HttpResponse[T]): ApiException = {
-      val message = ler.body.message
+    private def luxmedErrorToApiException[T <: LuxmedBaseError](code: Int, error: T): ApiException = {
+      val message = error.message
       val errorMessage = message.toLowerCase
       if (errorMessage.contains("invalid login or password"))
         new InvalidLoginOrPasswordException
@@ -65,16 +67,17 @@ package object http extends Logger {
       else if (errorMessage.contains("session has expired"))
         new SessionExpiredException
       else
-        new GenericException(ler.code, ler.statusLine, message)
+        new GenericException(code, message)
     }
 
-    private def extractLuxmedError(httpResponse: Try[HttpResponse[String]]) = {
-      httpResponse.flatMap { response =>
-        Try(response.asEntity[LuxmedErrorsMap])
-          .orElse(Try(response.asEntity[LuxmedErrorsList]))
-          .orElse(Try(response.asEntity[LuxmedError]))
-          .map(e => luxmedErrorToApiException(e.asInstanceOf[HttpResponse[LuxmedBaseError]]))
-      }.toOption
+    private def extractLuxmedError(httpResponse: HttpResponse[String]) = {
+      val body = httpResponse.body
+      val code = httpResponse.code
+      Try(body.as[LuxmedErrorsMap])
+        .orElse(Try(body.as[LuxmedErrorsList]))
+        .orElse(Try(body.as[LuxmedError]))
+        .map(error => luxmedErrorToApiException(code, error))
+        .toOption
     }
 
     private def hidePasswords(httpRequest: HttpRequest) = {
diff --git a/api/src/main/scala/com/lbs/api/json/model/LuxmedErrorsMap.scala b/api/src/main/scala/com/lbs/api/json/model/LuxmedErrorsMap.scala
index 9cd779a..22c5bc3 100644
--- a/api/src/main/scala/com/lbs/api/json/model/LuxmedErrorsMap.scala
+++ b/api/src/main/scala/com/lbs/api/json/model/LuxmedErrorsMap.scala
@@ -2,5 +2,5 @@
 package com.lbs.api.json.model
 
 case class LuxmedErrorsMap(errors: Map[String, List[String]]) extends SerializableJsonObject with LuxmedBaseError {
-  override def message: String = errors.values.mkString("; ")
+  override def message: String = errors.values.map(_.mkString("; ")).mkString("; ")
 }
\ No newline at end of file
diff --git a/api/src/main/scala/com/lbs/api/package.scala b/api/src/main/scala/com/lbs/api/package.scala
index f1a0281..2892963 100644
--- a/api/src/main/scala/com/lbs/api/package.scala
+++ b/api/src/main/scala/com/lbs/api/package.scala
@@ -1,13 +1,18 @@
 
 package com.lbs
 
+import cats.MonadError
+import cats.implicits._
 import com.lbs.api.json.model.{AvailableTermsResponse, ReservationFilterResponse, ReservedVisitsResponse, VisitsHistoryResponse}
 import com.softwaremill.quicklens._
 
+import scala.language.higherKinds
 import scala.util.matching.Regex
 
 package object api {
 
+  type ThrowableMonad[F[_]] = MonadError[F, Throwable]
+
   object ApiResponseMutators {
     private val DoctorPrefixes: Regex = """\s*(dr\s*n.\s*med.|dr\s*hab.\s*n.\s*med|lek.\s*med.|lek.\s*stom.)\s*""".r
 
@@ -17,8 +22,8 @@ package object api {
       def mutate(response: T): T
     }
 
-    implicit class ResponseOps[T: ResponseMutator](response: Either[Throwable, T]) {
-      def mutate: Either[Throwable, T] = {
+    implicit class ResponseOps[T: ResponseMutator, F[_] : ThrowableMonad](response: F[T]) {
+      def mutate: F[T] = {
         val mutator = implicitly[ResponseMutator[T]]
         response.map(mutator.mutate)
       }
diff --git a/api/src/test/scala/com/lbs/api/http/ExtendedHttpRequestSpec.scala b/api/src/test/scala/com/lbs/api/http/ExtendedHttpRequestSpec.scala
new file mode 100644
index 0000000..8b8ab04
--- /dev/null
+++ b/api/src/test/scala/com/lbs/api/http/ExtendedHttpRequestSpec.scala
@@ -0,0 +1,38 @@
+package com.lbs.api.http
+
+import cats.instances.either._
+import com.lbs.api.exception.GenericException
+import org.mockito.Mockito._
+import org.scalatest.mockito.MockitoSugar
+import org.scalatest.{BeforeAndAfterEach, FunSuiteLike, Matchers}
+import scalaj.http.{HttpRequest, HttpResponse}
+
+class ExtendedHttpRequestSpec extends FunSuiteLike with Matchers with MockitoSugar with BeforeAndAfterEach {
+
+  private val request = mock[HttpRequest]
+  private type ThrowableOr[T] = Either[Throwable, T]
+
+  override protected def beforeEach(): Unit = {
+    reset(request)
+    when(request.params).thenReturn(Seq())
+  }
+
+  test("ok response") {
+    val okResponse = HttpResponse("ok", 200, Map())
+    when(request.asString).thenReturn(okResponse)
+
+    assert(invoke(request) == Right(okResponse))
+  }
+
+  test("error response") {
+    val errorResponse = HttpResponse("""{"Errors":{"ToDate.Date":["'To Date. Date' must be greater than or equal to '06/04/2018 00:00:00'."]}}""", 200, Map())
+    when(request.asString).thenReturn(errorResponse)
+    val result = invoke(request)
+
+    assert(result == Left(GenericException(200, "'To Date. Date' must be greater than or equal to '06/04/2018 00:00:00'.")))
+  }
+
+  private def invoke(request: HttpRequest) = {
+    ExtendedHttpRequest[ThrowableOr](request).invoke
+  }
+}
diff --git a/common/build.gradle b/common/build.gradle
index bdf3ccd..adfb9e2 100644
--- a/common/build.gradle
+++ b/common/build.gradle
@@ -2,4 +2,5 @@ dependencies {
     compile group: "org.slf4j", name: "slf4j-api", version: "1.7.25"
     compile group: "ch.qos.logback", name: "logback-classic", version: "1.2.3"
     compile group: "ch.qos.logback", name: "logback-core", version: "1.2.3"
+    compile("org.typelevel:cats-core_2.12:2.0.0-M1")
 }
diff --git a/server/src/main/scala/com/lbs/server/conversation/StaticData.scala b/server/src/main/scala/com/lbs/server/conversation/StaticData.scala
index bd24f9d..36251af 100644
--- a/server/src/main/scala/com/lbs/server/conversation/StaticData.scala
+++ b/server/src/main/scala/com/lbs/server/conversation/StaticData.scala
@@ -5,6 +5,7 @@ import akka.actor.ActorSystem
 import com.lbs.api.json.model.IdName
 import com.lbs.bot.model.{Button, Command, TaggedButton}
 import com.lbs.bot.{Bot, _}
+import com.lbs.server.ThrowableOr
 import com.lbs.server.conversation.Login.UserId
 import com.lbs.server.conversation.StaticData._
 import com.lbs.server.conversation.base.{Conversation, Interactional}
@@ -78,6 +79,6 @@ object StaticData {
 
   case class FindOptions(searchText: String)
 
-  case class FoundOptions(option: Either[Throwable, List[IdName]])
+  case class FoundOptions(option: ThrowableOr[List[IdName]])
 
 }
\ No newline at end of file
diff --git a/server/src/main/scala/com/lbs/server/conversation/StaticDataForBooking.scala b/server/src/main/scala/com/lbs/server/conversation/StaticDataForBooking.scala
index eb00860..07a18c9 100644
--- a/server/src/main/scala/com/lbs/server/conversation/StaticDataForBooking.scala
+++ b/server/src/main/scala/com/lbs/server/conversation/StaticDataForBooking.scala
@@ -6,12 +6,13 @@ import com.lbs.bot.model.Command
 import com.lbs.server.conversation.Book.BookingData
 import com.lbs.server.conversation.StaticData.{FindOptions, FoundOptions, LatestOptions, StaticDataConfig}
 import com.lbs.server.conversation.base.Conversation
+import com.lbs.server.ThrowableOr
 
 trait StaticDataForBooking extends Conversation[BookingData] {
 
   private[conversation] def staticData: StaticData
 
-  protected def withFunctions(latestOptions: => Seq[IdName], staticOptions: => Either[Throwable, List[IdName]], applyId: IdName => BookingData): Step => MessageProcessorFn = {
+  protected def withFunctions(latestOptions: => Seq[IdName], staticOptions: => ThrowableOr[List[IdName]], applyId: IdName => BookingData): Step => MessageProcessorFn = {
     nextStep: Step => {
       case Msg(cmd: Command, _) =>
         staticData ! cmd
@@ -38,7 +39,7 @@ trait StaticDataForBooking extends Conversation[BookingData] {
     }
   }
 
-  private def filterOptions(options: Either[Throwable, List[IdName]], searchText: String) = {
+  private def filterOptions(options: ThrowableOr[List[IdName]], searchText: String) = {
     options.map(opt => opt.filter(c => c.name.toLowerCase.contains(searchText)))
   }
 }
diff --git a/server/src/main/scala/com/lbs/server/package.scala b/server/src/main/scala/com/lbs/server/package.scala
new file mode 100644
index 0000000..87ece19
--- /dev/null
+++ b/server/src/main/scala/com/lbs/server/package.scala
@@ -0,0 +1,5 @@
+package com.lbs
+
+package object server {
+  type ThrowableOr[T] = Either[Throwable, T]
+}
diff --git a/server/src/main/scala/com/lbs/server/service/ApiService.scala b/server/src/main/scala/com/lbs/server/service/ApiService.scala
index 0924f05..4dd3e3b 100644
--- a/server/src/main/scala/com/lbs/server/service/ApiService.scala
+++ b/server/src/main/scala/com/lbs/server/service/ApiService.scala
@@ -3,8 +3,10 @@ package com.lbs.server.service
 
 import java.time.{LocalTime, ZonedDateTime}
 
+import cats.instances.either._
 import com.lbs.api.LuxmedApi
 import com.lbs.api.json.model._
+import com.lbs.server.ThrowableOr
 import com.lbs.server.util.ServerModelConverters._
 import org.jasypt.util.text.TextEncryptor
 import org.springframework.beans.factory.annotation.Autowired
@@ -19,34 +21,36 @@ class ApiService extends SessionSupport {
   @Autowired
   private var textEncryptor: TextEncryptor = _
 
-  def getAllCities(accountId: Long): Either[Throwable, List[IdName]] =
+  private val luxmedApi = new LuxmedApi[ThrowableOr]
+
+  def getAllCities(accountId: Long): ThrowableOr[List[IdName]] =
     withSession(accountId) { session =>
-      LuxmedApi.reservationFilter(session.accessToken, session.tokenType).map(_.cities)
+      luxmedApi.reservationFilter(session.accessToken, session.tokenType).map(_.cities)
     }
 
-  def getAllClinics(accountId: Long, cityId: Long): Either[Throwable, List[IdName]] =
+  def getAllClinics(accountId: Long, cityId: Long): ThrowableOr[List[IdName]] =
     withSession(accountId) { session =>
-      LuxmedApi.reservationFilter(session.accessToken,
+      luxmedApi.reservationFilter(session.accessToken,
         session.tokenType, cityId = Some(cityId)).map(_.clinics)
     }
 
-  def getAllServices(accountId: Long, cityId: Long, clinicId: Option[Long]): Either[Throwable, List[IdName]] =
+  def getAllServices(accountId: Long, cityId: Long, clinicId: Option[Long]): ThrowableOr[List[IdName]] =
     withSession(accountId) { session =>
-      LuxmedApi.reservationFilter(session.accessToken,
+      luxmedApi.reservationFilter(session.accessToken,
         session.tokenType, cityId = Some(cityId),
         clinicId = clinicId).map(_.services)
     }
 
-  def getAllDoctors(accountId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long): Either[Throwable, List[IdName]] =
+  def getAllDoctors(accountId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long): ThrowableOr[List[IdName]] =
     withSession(accountId) { session =>
-      LuxmedApi.reservationFilter(session.accessToken,
+      luxmedApi.reservationFilter(session.accessToken,
         session.tokenType, cityId = Some(cityId),
         clinicId = clinicId, serviceId = Some(serviceId)).map(_.doctors)
     }
 
-  def getPayers(accountId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long): Either[Throwable, (Option[IdName], Seq[IdName])] =
+  def getPayers(accountId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long): ThrowableOr[(Option[IdName], Seq[IdName])] =
     withSession(accountId) { session =>
-      val reservationFilterResponse = LuxmedApi.reservationFilter(session.accessToken,
+      val reservationFilterResponse = luxmedApi.reservationFilter(session.accessToken,
         session.tokenType, cityId = Some(cityId),
         clinicId = clinicId, serviceId = Some(serviceId))
       reservationFilterResponse.map { response =>
@@ -56,9 +60,9 @@ class ApiService extends SessionSupport {
 
   def getAvailableTerms(accountId: Long, payerId: Long, cityId: Long, clinicId: Option[Long], serviceId: Long, doctorId: Option[Long],
                         fromDate: ZonedDateTime = ZonedDateTime.now(), toDate: Option[ZonedDateTime] = None, timeFrom: LocalTime, timeTo: LocalTime,
-                        languageId: Long = 10, findFirstFreeTerm: Boolean = false): Either[Throwable, List[AvailableVisitsTermPresentation]] =
+                        languageId: Long = 10, findFirstFreeTerm: Boolean = false): ThrowableOr[List[AvailableVisitsTermPresentation]] =
     withSession(accountId) { session =>
-      val termsEither = LuxmedApi.availableTerms(session.accessToken, session.tokenType, payerId, cityId, clinicId, serviceId, doctorId,
+      val termsEither = luxmedApi.availableTerms(session.accessToken, session.tokenType, payerId, cityId, clinicId, serviceId, doctorId,
         fromDate, toDate, languageId = languageId, findFirstFreeTerm = findFirstFreeTerm).map(_.availableVisitsTermPresentation)
       termsEither.map { terms =>
         terms.filter { term =>
@@ -68,25 +72,25 @@ class ApiService extends SessionSupport {
       }
     }
 
-  def temporaryReservation(accountId: Long, temporaryReservationRequest: TemporaryReservationRequest, valuationsRequest: ValuationsRequest): Either[Throwable, (TemporaryReservationResponse, ValuationsResponse)] =
+  def temporaryReservation(accountId: Long, temporaryReservationRequest: TemporaryReservationRequest, valuationsRequest: ValuationsRequest): ThrowableOr[(TemporaryReservationResponse, ValuationsResponse)] =
     withSession(accountId) { session =>
       for {
-        temporaryReservation <- LuxmedApi.temporaryReservation(session.accessToken, session.tokenType, temporaryReservationRequest)
-        valuationsResponse <- LuxmedApi.valuations(session.accessToken, session.tokenType, valuationsRequest)
+        temporaryReservation <- luxmedApi.temporaryReservation(session.accessToken, session.tokenType, temporaryReservationRequest)
+        valuationsResponse <- luxmedApi.valuations(session.accessToken, session.tokenType, valuationsRequest)
       } yield temporaryReservation -> valuationsResponse
     }
 
-  def deleteTemporaryReservation(accountId: Long, temporaryReservationId: Long): Either[Throwable, HttpResponse[String]] =
+  def deleteTemporaryReservation(accountId: Long, temporaryReservationId: Long): ThrowableOr[HttpResponse[String]] =
     withSession(accountId) { session =>
-      LuxmedApi.deleteTemporaryReservation(session.accessToken, session.tokenType, temporaryReservationId)
+      luxmedApi.deleteTemporaryReservation(session.accessToken, session.tokenType, temporaryReservationId)
     }
 
-  def reservation(accountId: Long, reservationRequest: ReservationRequest): Either[Throwable, ReservationResponse] =
+  def reservation(accountId: Long, reservationRequest: ReservationRequest): ThrowableOr[ReservationResponse] =
     withSession(accountId) { session =>
-      LuxmedApi.reservation(session.accessToken, session.tokenType, reservationRequest)
+      luxmedApi.reservation(session.accessToken, session.tokenType, reservationRequest)
     }
 
-  def reserveVisit(accountId: Long, term: AvailableVisitsTermPresentation): Either[Throwable, ReservationResponse] = {
+  def reserveVisit(accountId: Long, term: AvailableVisitsTermPresentation): ThrowableOr[ReservationResponse] = {
     val temporaryReservationRequest = term.mapTo[TemporaryReservationRequest]
     val valuationsRequest = term.mapTo[ValuationsRequest]
     for {
@@ -99,38 +103,38 @@ class ApiService extends SessionSupport {
     } yield reservation
   }
 
-  def canTermBeChanged(accountId: Long, reservationId: Long): Either[Throwable, HttpResponse[String]] =
+  def canTermBeChanged(accountId: Long, reservationId: Long): ThrowableOr[HttpResponse[String]] =
     withSession(accountId) { session =>
-      LuxmedApi.canTermBeChanged(session.accessToken, session.tokenType, reservationId)
+      luxmedApi.canTermBeChanged(session.accessToken, session.tokenType, reservationId)
     }
 
 
-  def detailToChangeTerm(accountId: Long, reservationId: Long): Either[Throwable, ChangeTermDetailsResponse] =
+  def detailToChangeTerm(accountId: Long, reservationId: Long): ThrowableOr[ChangeTermDetailsResponse] =
     withSession(accountId) { session =>
-      LuxmedApi.detailToChangeTerm(session.accessToken, session.tokenType, reservationId)
+      luxmedApi.detailToChangeTerm(session.accessToken, session.tokenType, reservationId)
     }
 
-  def temporaryReservationToChangeTerm(accountId: Long, reservationId: Long, temporaryReservationRequest: TemporaryReservationRequest, valuationsRequest: ValuationsRequest): Either[Throwable, (TemporaryReservationResponse, ValuationsResponse)] =
+  def temporaryReservationToChangeTerm(accountId: Long, reservationId: Long, temporaryReservationRequest: TemporaryReservationRequest, valuationsRequest: ValuationsRequest): ThrowableOr[(TemporaryReservationResponse, ValuationsResponse)] =
     withSession(accountId) { session =>
       for {
-        temporaryReservation <- LuxmedApi.temporaryReservationToChangeTerm(session.accessToken, session.tokenType, reservationId, temporaryReservationRequest)
-        valuationsResponse <- LuxmedApi.valuationToChangeTerm(session.accessToken, session.tokenType, reservationId, valuationsRequest)
+        temporaryReservation <- luxmedApi.temporaryReservationToChangeTerm(session.accessToken, session.tokenType, reservationId, temporaryReservationRequest)
+        valuationsResponse <- luxmedApi.valuationToChangeTerm(session.accessToken, session.tokenType, reservationId, valuationsRequest)
       } yield temporaryReservation -> valuationsResponse
     }
 
-  def valuationToChangeTerm(accountId: Long, reservationId: Long, valuationsRequest: ValuationsRequest): Either[Throwable, ValuationsResponse] =
+  def valuationToChangeTerm(accountId: Long, reservationId: Long, valuationsRequest: ValuationsRequest): ThrowableOr[ValuationsResponse] =
     withSession(accountId) { session =>
-      LuxmedApi.valuationToChangeTerm(session.accessToken, session.tokenType, reservationId, valuationsRequest)
+      luxmedApi.valuationToChangeTerm(session.accessToken, session.tokenType, reservationId, valuationsRequest)
     }
 
-  def changeTerm(accountId: Long, reservationId: Long, reservationRequest: ReservationRequest): Either[Throwable, ChangeTermResponse] =
+  def changeTerm(accountId: Long, reservationId: Long, reservationRequest: ReservationRequest): ThrowableOr[ChangeTermResponse] =
     withSession(accountId) { session =>
-      LuxmedApi.changeTerm(session.accessToken, session.tokenType, reservationId, reservationRequest)
+      luxmedApi.changeTerm(session.accessToken, session.tokenType, reservationId, reservationRequest)
     }
 
-  def updateReservedVisit(accountId: Long, term: AvailableVisitsTermPresentation): Either[Throwable, ChangeTermResponse] = {
-    val reservedVisitEither = reservedVisits(accountId, toDate = ZonedDateTime.now().plusMonths(6)).map(_.find(_.service.id == term.serviceId))
-    reservedVisitEither match {
+  def updateReservedVisit(accountId: Long, term: AvailableVisitsTermPresentation): ThrowableOr[ChangeTermResponse] = {
+    val reservedVisitMaybe = reservedVisits(accountId, toDate = ZonedDateTime.now().plusMonths(6)).map(_.find(_.service.id == term.serviceId))
+    reservedVisitMaybe match {
       case Right(Some(reservedVisit: ReservedVisit)) =>
         val reservationId = reservedVisit.reservationId
         val temporaryReservationRequest = term.mapTo[TemporaryReservationRequest]
@@ -154,24 +158,24 @@ class ApiService extends SessionSupport {
   }
 
   def visitsHistory(accountId: Long, fromDate: ZonedDateTime = ZonedDateTime.now().minusYears(1),
-                    toDate: ZonedDateTime = ZonedDateTime.now(), page: Int = 1, pageSize: Int = 100): Either[Throwable, List[HistoricVisit]] =
+                    toDate: ZonedDateTime = ZonedDateTime.now(), page: Int = 1, pageSize: Int = 100): ThrowableOr[List[HistoricVisit]] =
     withSession(accountId) { session =>
-      LuxmedApi.visitsHistory(session.accessToken, session.tokenType, fromDate, toDate, page, pageSize).map(_.historicVisits)
+      luxmedApi.visitsHistory(session.accessToken, session.tokenType, fromDate, toDate, page, pageSize).map(_.historicVisits)
     }
 
   def reservedVisits(accountId: Long, fromDate: ZonedDateTime = ZonedDateTime.now(),
-                     toDate: ZonedDateTime = ZonedDateTime.now().plusMonths(3)): Either[Throwable, List[ReservedVisit]] =
+                     toDate: ZonedDateTime = ZonedDateTime.now().plusMonths(3)): ThrowableOr[List[ReservedVisit]] =
     withSession(accountId) { session =>
-      LuxmedApi.reservedVisits(session.accessToken, session.tokenType, fromDate, toDate).map(_.reservedVisits)
+      luxmedApi.reservedVisits(session.accessToken, session.tokenType, fromDate, toDate).map(_.reservedVisits)
     }
 
-  def deleteReservation(accountId: Long, reservationId: Long): Either[Throwable, HttpResponse[String]] =
+  def deleteReservation(accountId: Long, reservationId: Long): ThrowableOr[HttpResponse[String]] =
     withSession(accountId) { session =>
-      LuxmedApi.deleteReservation(session.accessToken, session.tokenType, reservationId)
+      luxmedApi.deleteReservation(session.accessToken, session.tokenType, reservationId)
     }
 
-  def login(username: String, password: String): Either[Throwable, LoginResponse] = {
-    LuxmedApi.login(username, textEncryptor.decrypt(password))
+  def login(username: String, password: String): ThrowableOr[LoginResponse] = {
+    luxmedApi.login(username, textEncryptor.decrypt(password))
   }
 
   private def left(msg: String) = Left(new RuntimeException(msg))
diff --git a/server/src/main/scala/com/lbs/server/service/SessionSupport.scala b/server/src/main/scala/com/lbs/server/service/SessionSupport.scala
index a3b210c..0fd84bc 100644
--- a/server/src/main/scala/com/lbs/server/service/SessionSupport.scala
+++ b/server/src/main/scala/com/lbs/server/service/SessionSupport.scala
@@ -4,6 +4,7 @@ package com.lbs.server.service
 import com.lbs.api.exception.SessionExpiredException
 import com.lbs.api.json.model.LoginResponse
 import com.lbs.common.{Logger, ParametrizedLock}
+import com.lbs.server.ThrowableOr
 import com.lbs.server.exception.UserNotFoundException
 
 import scala.collection.mutable
@@ -12,7 +13,7 @@ trait SessionSupport extends Logger {
 
   case class Session(accessToken: String, tokenType: String)
 
-  def login(username: String, password: String): Either[Throwable, LoginResponse]
+  def login(username: String, password: String): ThrowableOr[LoginResponse]
 
   protected def dataService: DataService
 
@@ -20,10 +21,10 @@ trait SessionSupport extends Logger {
 
   private val lock = new ParametrizedLock[Long]
 
-  protected def withSession[T](accountId: Long)(fn: Session => Either[Throwable, T]): Either[Throwable, T] =
+  protected def withSession[T](accountId: Long)(fn: Session => ThrowableOr[T]): ThrowableOr[T] =
     lock.obtainLock(accountId).synchronized {
 
-      def auth: Either[Throwable, Session] = {
+      def auth: ThrowableOr[Session] = {
         val credentialsMaybe = dataService.getCredentials(accountId)
         credentialsMaybe match {
           case Some(credentials) =>
@@ -33,7 +34,7 @@ trait SessionSupport extends Logger {
         }
       }
 
-      def getSession: Either[Throwable, Session] = {
+      def getSession: ThrowableOr[Session] = {
         sessions.get(accountId) match {
           case Some(sess) => Right(sess)
           case None =>