diff --git a/.github/workflows/scala.yml b/.github/workflows/scala.yml
index 7afbe37..8007c8f 100644
--- a/.github/workflows/scala.yml
+++ b/.github/workflows/scala.yml
@@ -13,10 +13,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 1.8
+    - name: Set up JDK 1.11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 1.11
     - name: Run tests
       run: sbt test
     - name: Run linter
diff --git a/build.sbt b/build.sbt
index ba3cf96..4691280 100644
--- a/build.sbt
+++ b/build.sbt
@@ -21,7 +21,6 @@ scalacOptions ++= List(
   "-Ywarn-unused"
 )
 javacOptions += "-g:none"
-scalafmtOnCompile := true
 compileOrder := CompileOrder.JavaThenScala
 
 fork in run := true
diff --git a/config.json b/config.json
index ee7ed58..727b973 100644
--- a/config.json
+++ b/config.json
@@ -1,34 +1,37 @@
 {
     "randomSeed": 20,
+    "port": 8888,
     "captchaExpiryTimeLimit": 5,
-    "captchas":{
-        "FilterChallenge":{
+    "threadDelay": 2,
+    "throttle": 10,
+    "captchas":[
+        {
             "name": "FilterChallenge",
-            "supportedLevels":["medium", "hard"],
-            "supportedMedia":["image"],
-            "supportedinputType":["text"],
+            "allowedLevels":["medium", "hard"],
+            "allowedMedia":["image/png"],
+            "allowedInputType":["text"],
             "config":{}
         },
-        "GifCaptcha":{
+        {
             "name": "GifCaptcha",
-            "supportedLevels":["hard"],
-            "supportedMedia":["gif"],
-            "supportedinputType":["text"],
+            "allowedLevels":["hard"],
+            "allowedMedia":["image/gif"],
+            "allowedInputType":["text"],
             "config":{}
         },
-        "ShadowTextCaptcha":{
+        {
             "name": "ShadowTextCaptcha",
-            "supportedLevels":["easy"],
-            "supportedMedia":["image"],
-            "supportedinputType":["text"],
+            "allowedLevels":["easy"],
+            "allowedMedia":["image/png"],
+            "allowedInputType":["text"],
             "config": {}
         },
-        "RainDropsCaptcha":{
+        {
             "name": "RainDropsCaptcha",
-            "supportedLevels":["easy","medium"],
-            "supportedMedia":["image"],
-            "supportedinputType":["text"],
+            "allowedLevels":["easy","medium"],
+            "allowedMedia":["image/gif"],
+            "allowedInputType":["text"],
             "config":{}
         }
-    }
+    ]
 }
\ No newline at end of file
diff --git a/src/main/java/lc/captchas/FontFunCaptcha.java b/src/main/java/lc/captchas/FontFunCaptcha.java
index a69998b..bb1c278 100644
--- a/src/main/java/lc/captchas/FontFunCaptcha.java
+++ b/src/main/java/lc/captchas/FontFunCaptcha.java
@@ -6,6 +6,8 @@ import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FilenameFilter;
+import java.util.HashMap;
+import java.util.List;
 import lc.captchas.interfaces.Challenge;
 import lc.captchas.interfaces.ChallengeProvider;
 import lc.misc.HelperFunctions;
@@ -16,6 +18,19 @@ public class FontFunCaptcha implements ChallengeProvider {
     return "FontFunCaptcha";
   }
 
+  public HashMap<String, List<String>> supportedParameters() {
+    HashMap<String, List<String>> supportedParams = new HashMap<String, List<String>>();
+    supportedParams.put("supportedLevels", List.of("medium"));
+    supportedParams.put("supportedMedia", List.of("image/png"));
+    supportedParams.put("supportedInputType", List.of("text"));
+
+    return supportedParams;
+  }
+
+  public void configure(String config) {
+    // TODO: Add custom config
+  }
+
   private String getFontName(String path, String level) {
     File file = new File(path + level + "/");
     FilenameFilter txtFileFilter =
diff --git a/src/main/java/lc/captchas/GifCaptcha.java b/src/main/java/lc/captchas/GifCaptcha.java
index 92a87ec..13cf0fa 100644
--- a/src/main/java/lc/captchas/GifCaptcha.java
+++ b/src/main/java/lc/captchas/GifCaptcha.java
@@ -6,6 +6,9 @@ import java.awt.RenderingHints;
 import java.awt.Color;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+
 import javax.imageio.stream.ImageOutputStream;
 import javax.imageio.stream.MemoryCacheImageOutputStream;
 import java.io.ByteArrayOutputStream;
@@ -48,6 +51,19 @@ public class GifCaptcha implements ChallengeProvider {
     return null;
   }
 
+  public void configure(String config) {
+    // TODO: Add custom config
+  }
+
+  public HashMap<String, List<String>> supportedParameters() {
+    HashMap<String, List<String>> supportedParams = new HashMap<String, List<String>>();
+    supportedParams.put("supportedLevels", List.of("hard"));
+    supportedParams.put("supportedMedia", List.of("image/gif"));
+    supportedParams.put("supportedInputType", List.of("text"));
+
+    return supportedParams;
+  }
+
   public Challenge returnChallenge() {
     String secret = HelperFunctions.randomString(6);
     return new Challenge(gifCaptcha(secret), "image/gif", secret.toLowerCase());
diff --git a/src/main/java/lc/captchas/ShadowTextCaptcha.java b/src/main/java/lc/captchas/ShadowTextCaptcha.java
index 0128e97..5b3b873 100644
--- a/src/main/java/lc/captchas/ShadowTextCaptcha.java
+++ b/src/main/java/lc/captchas/ShadowTextCaptcha.java
@@ -10,6 +10,9 @@ import java.awt.image.BufferedImage;
 import java.awt.image.ConvolveOp;
 import java.awt.image.Kernel;
 import java.io.ByteArrayOutputStream;
+import java.util.HashMap;
+import java.util.List;
+
 import lc.misc.HelperFunctions;
 import lc.captchas.interfaces.Challenge;
 import lc.captchas.interfaces.ChallengeProvider;
@@ -20,6 +23,19 @@ public class ShadowTextCaptcha implements ChallengeProvider {
     return "ShadowTextCaptcha";
   }
 
+  public void configure(String config) {
+    // TODO: Add custom config
+  }
+
+  public HashMap<String, List<String>> supportedParameters() {
+    HashMap<String, List<String>> supportedParams = new HashMap<String, List<String>>();
+    supportedParams.put("supportedLevels", List.of("easy"));
+    supportedParams.put("supportedMedia", List.of("image/png"));
+    supportedParams.put("supportedInputType", List.of("text"));
+
+    return supportedParams;
+  }
+
   public boolean checkAnswer(String secret, String answer) {
     return answer.toLowerCase().equals(secret);
   }
diff --git a/src/main/java/lc/captchas/interfaces/ChallengeProvider.java b/src/main/java/lc/captchas/interfaces/ChallengeProvider.java
index ef8e7d0..a3a70e2 100644
--- a/src/main/java/lc/captchas/interfaces/ChallengeProvider.java
+++ b/src/main/java/lc/captchas/interfaces/ChallengeProvider.java
@@ -1,5 +1,8 @@
 package lc.captchas.interfaces;
 
+import java.util.Map;
+import java.util.List;
+
 public interface ChallengeProvider {
   public String getId();
 
@@ -7,5 +10,7 @@ public interface ChallengeProvider {
 
   public boolean checkAnswer(String secret, String answer);
 
-  // TODO: def configure(): Unit
+  public void configure(String config);
+
+  public Map<String, List<String>> supportedParameters();
 }
diff --git a/src/main/scala/lc/Main.scala b/src/main/scala/lc/Main.scala
index 739bc35..491ed3f 100644
--- a/src/main/scala/lc/Main.scala
+++ b/src/main/scala/lc/Main.scala
@@ -3,13 +3,18 @@ package lc
 import lc.core.{Captcha, CaptchaProviders}
 import lc.server.Server
 import lc.background.BackgroundTask
+import lc.core.Config
 
 object LCFramework {
   def main(args: scala.Array[String]): Unit = {
     val captcha = new Captcha()
-    val server = new Server(8888, captcha)
-    val backgroudTask = new BackgroundTask(captcha, 10)
-    backgroudTask.beginThread(2)
+    val server = new Server(port = Config.port, captcha = captcha)
+    val backgroundTask = new BackgroundTask(
+      captcha = captcha,
+      throttle = Config.throttle,
+      timeLimit = Config.captchaExpiryTimeLimit
+    )
+    backgroundTask.beginThread(delay = Config.threadDelay)
     server.start()
   }
 }
diff --git a/src/main/scala/lc/background/taskThread.scala b/src/main/scala/lc/background/taskThread.scala
index fe3cbbc..c6cfe7e 100644
--- a/src/main/scala/lc/background/taskThread.scala
+++ b/src/main/scala/lc/background/taskThread.scala
@@ -5,13 +5,14 @@ import java.util.concurrent.{ScheduledThreadPoolExecutor, TimeUnit}
 import lc.core.Captcha
 import lc.core.{Parameters, Size}
 
-class BackgroundTask(captcha: Captcha, throttle: Int) {
+class BackgroundTask(captcha: Captcha, throttle: Int, timeLimit: Int) {
 
   private val task = new Runnable {
     def run(): Unit = {
       try {
 
         val mapIdGCPstmt = Statements.tlStmts.get.mapIdGCPstmt
+        mapIdGCPstmt.setInt(1, timeLimit)
         mapIdGCPstmt.executeUpdate()
 
         val challengeGCPstmt = Statements.tlStmts.get.challengeGCPstmt
@@ -22,7 +23,7 @@ class BackgroundTask(captcha: Captcha, throttle: Int) {
         if (imageNum.next())
           throttleIn = (throttleIn - imageNum.getInt("total"))
         while (0 < throttleIn) {
-          captcha.generateChallenge(Parameters("", "", "", Option(Size(0, 0))))
+          captcha.generateChallenge(Parameters("medium", "image/png", "text", Option(Size(0, 0))))
           throttleIn -= 1
         }
       } catch { case e: Exception => println(e) }
diff --git a/src/main/scala/lc/captchas/FilterChallenge.scala b/src/main/scala/lc/captchas/FilterChallenge.scala
index 0a1ef61..a4508b6 100644
--- a/src/main/scala/lc/captchas/FilterChallenge.scala
+++ b/src/main/scala/lc/captchas/FilterChallenge.scala
@@ -7,9 +7,26 @@ import java.awt.Font
 import java.awt.Color
 import lc.captchas.interfaces.ChallengeProvider
 import lc.captchas.interfaces.Challenge
+import scala.jdk.CollectionConverters.MapHasAsJava
+import java.util.{List => JavaList, Map => JavaMap}
 
 class FilterChallenge extends ChallengeProvider {
   def getId = "FilterChallenge"
+
+  def configure(config: String): Unit = {
+    // TODO: add custom config
+  }
+
+  def supportedParameters(): JavaMap[String, JavaList[String]] = {
+    val supportedParams = Map(
+      "supportedLevels" -> JavaList.of("medium", "hard"),
+      "supportedMedia" -> JavaList.of("image/png"),
+      "supportedInputType" -> JavaList.of("text")
+    ).asJava
+
+    supportedParams
+  }
+
   def returnChallenge(): Challenge = {
     val filterTypes = List(new FilterType1, new FilterType2)
     val r = new scala.util.Random
diff --git a/src/main/scala/lc/captchas/LabelCaptcha.scala b/src/main/scala/lc/captchas/LabelCaptcha.scala
index afbc5e0..5233678 100644
--- a/src/main/scala/lc/captchas/LabelCaptcha.scala
+++ b/src/main/scala/lc/captchas/LabelCaptcha.scala
@@ -9,6 +9,8 @@ import java.awt.image.BufferedImage
 import java.awt.Color
 import lc.captchas.interfaces.ChallengeProvider
 import lc.captchas.interfaces.Challenge
+import scala.jdk.CollectionConverters.MapHasAsJava
+import java.util.{List => JavaList, Map => JavaMap}
 
 class LabelCaptcha extends ChallengeProvider {
   private var knownFiles = new File("known").list.toList
@@ -23,6 +25,20 @@ class LabelCaptcha extends ChallengeProvider {
 
   def getId = "LabelCaptcha"
 
+  def configure(config: String): Unit = {
+    // TODO: add custom config
+  }
+
+  def supportedParameters(): JavaMap[String, JavaList[String]] = {
+    val supportedParams = Map(
+      "supportedLevels" -> JavaList.of("hard"),
+      "supportedMedia" -> JavaList.of("image/png"),
+      "supportedInputType" -> JavaList.of("text")
+    ).asJava
+
+    supportedParams
+  }
+
   def returnChallenge(): Challenge =
     synchronized {
       val r = scala.util.Random.nextInt(knownFiles.length)
diff --git a/src/main/scala/lc/captchas/RainDropsCaptcha.scala b/src/main/scala/lc/captchas/RainDropsCaptcha.scala
index da12829..2788096 100644
--- a/src/main/scala/lc/captchas/RainDropsCaptcha.scala
+++ b/src/main/scala/lc/captchas/RainDropsCaptcha.scala
@@ -10,6 +10,8 @@ import javax.imageio.stream.MemoryCacheImageOutputStream;
 import lc.captchas.interfaces.ChallengeProvider
 import lc.captchas.interfaces.Challenge
 import lc.misc.GifSequenceWriter
+import scala.jdk.CollectionConverters.MapHasAsJava
+import java.util.{List => JavaList, Map => JavaMap}
 
 class Drop {
   var x = 0
@@ -31,6 +33,20 @@ class RainDropsCP extends ChallengeProvider {
 
   def getId = "FilterChallenge"
 
+  def configure(config: String): Unit = {
+    // TODO: add custom config
+  }
+
+  def supportedParameters(): JavaMap[String, JavaList[String]] = {
+    val supportedParams = Map(
+      "supportedLevels" -> JavaList.of("medium", "easy"),
+      "supportedMedia" -> JavaList.of("image/gif"),
+      "supportedInputType" -> JavaList.of("text")
+    ).asJava
+
+    supportedParams
+  }
+
   private def extendDrops(drops: Array[Drop], steps: Int, xOffset: Int) = {
     drops.map(d => {
       val nd = new Drop()
diff --git a/src/main/scala/lc/core/captcha.scala b/src/main/scala/lc/core/captcha.scala
index dfbda96..c8c2edc 100644
--- a/src/main/scala/lc/core/captcha.scala
+++ b/src/main/scala/lc/core/captcha.scala
@@ -5,6 +5,7 @@ import java.util.UUID
 import java.io.ByteArrayInputStream
 import lc.database.Statements
 import lc.core.CaptchaProviders
+import lc.captchas.interfaces.ChallengeProvider
 
 class Captcha {
 
@@ -30,8 +31,8 @@ class Captcha {
   }
 
   def generateChallenge(param: Parameters): Int = {
-    //TODO: eval params to choose a provider
-    val provider = CaptchaProviders.getProvider()
+    val provider = CaptchaProviders.getProvider(param)
+    if (!provider.isInstanceOf[ChallengeProvider]) return -1
     val providerId = provider.getId()
     val challenge = provider.returnChallenge()
     val blob = new ByteArrayInputStream(challenge.content)
@@ -40,7 +41,9 @@ class Captcha {
     insertPstmt.setString(2, challenge.secret)
     insertPstmt.setString(3, providerId)
     insertPstmt.setString(4, challenge.contentType)
-    insertPstmt.setBlob(5, blob)
+    insertPstmt.setString(5, param.level)
+    insertPstmt.setString(6, param.input_type)
+    insertPstmt.setBlob(7, blob)
     insertPstmt.executeUpdate()
     val rs: ResultSet = insertPstmt.getGeneratedKeys()
     val token = if (rs.next()) {
@@ -50,24 +53,53 @@ class Captcha {
     token.asInstanceOf[Int]
   }
 
-  def getChallenge(param: Parameters): Id = {
+  val allowedInputType = Config.allowedInputType
+  val allowedLevels = Config.allowedLevels
+  val allowedMedia = Config.allowedMedia
+
+  private def validateParam(param: Parameters): Boolean = {
+    if (
+      allowedLevels.contains(param.level) &&
+      allowedMedia.contains(param.media) &&
+      allowedInputType.contains(param.input_type)
+    )
+      return true
+    else
+      return false
+  }
+
+  def getChallenge(param: Parameters): ChallengeResult = {
     try {
-      val tokenPstmt = Statements.tlStmts.get.tokenPstmt
-      val rs = tokenPstmt.executeQuery()
-      val tokenOpt = if (rs.next()) {
-        Some(rs.getInt("token"))
+      val validParam = validateParam(param)
+      if (validParam) {
+        val tokenPstmt = Statements.tlStmts.get.tokenPstmt
+        tokenPstmt.setString(1, param.level)
+        tokenPstmt.setString(2, param.media)
+        tokenPstmt.setString(3, param.input_type)
+        val rs = tokenPstmt.executeQuery()
+        val tokenOpt = if (rs.next()) {
+          Some(rs.getInt("token"))
+        } else {
+          None
+        }
+        val updateAttemptedPstmt = Statements.tlStmts.get.updateAttemptedPstmt
+        val token = tokenOpt.getOrElse(generateChallenge(param))
+        val result = if (token != -1) {
+          val uuid = getUUID(token)
+          updateAttemptedPstmt.setString(1, uuid)
+          updateAttemptedPstmt.executeUpdate()
+          Id(uuid)
+        } else {
+          Error(ErrorMessageEnum.NO_CAPTCHA.toString)
+        }
+        result
       } else {
-        None
+        Error(ErrorMessageEnum.INVALID_PARAM.toString)
       }
-      val updateAttemptedPstmt = Statements.tlStmts.get.updateAttemptedPstmt
-      val uuid = getUUID(tokenOpt.getOrElse(generateChallenge(param)))
-      updateAttemptedPstmt.setString(1, uuid)
-      updateAttemptedPstmt.executeUpdate()
-      Id(uuid)
     } catch {
       case e: Exception =>
         println(e)
-        Id(getUUID(-1))
+        Error(ErrorMessageEnum.SMW.toString)
     }
   }
 
@@ -82,16 +114,17 @@ class Captcha {
 
   def checkAnswer(answer: Answer): Result = {
     val selectPstmt = Statements.tlStmts.get.selectPstmt
-    selectPstmt.setString(1, answer.id)
+    selectPstmt.setInt(1, Config.captchaExpiryTimeLimit)
+    selectPstmt.setString(2, answer.id)
     val rs: ResultSet = selectPstmt.executeQuery()
     val psOpt = if (rs.first()) {
       val secret = rs.getString("secret")
       val provider = rs.getString("provider")
       val check = CaptchaProviders.getProviderById(provider).checkAnswer(secret, answer.answer)
-      val result = if (check) "TRUE" else "FALSE"
+      val result = if (check) ResultEnum.TRUE.toString else ResultEnum.FALSE.toString
       result
     } else {
-      "EXPIRED"
+      ResultEnum.EXPIRED.toString
     }
     val deleteAnswerPstmt = Statements.tlStmts.get.deleteAnswerPstmt
     deleteAnswerPstmt.setString(1, answer.id)
diff --git a/src/main/scala/lc/core/captchaFields.scala b/src/main/scala/lc/core/captchaFields.scala
new file mode 100644
index 0000000..5418ee9
--- /dev/null
+++ b/src/main/scala/lc/core/captchaFields.scala
@@ -0,0 +1,29 @@
+package lc.core
+
+object ParametersEnum extends Enumeration {
+  type Parameter = Value
+
+  val SUPPORTEDLEVEL: Value = Value("supportedLevels")
+  val SUPPORTEDMEDIA: Value = Value("supportedMedia")
+  val SUPPORTEDINPUTTYPE: Value = Value("supportedInputType")
+
+  val ALLOWEDLEVELS: Value = Value("allowedLevels")
+  val ALLOWEDMEDIA: Value = Value("allowedMedia")
+  val ALLOWEDINPUTTYPE: Value = Value("allowedInputType")
+}
+
+object ResultEnum extends Enumeration {
+  type Result = Value
+
+  val TRUE: Value = Value("True")
+  val FALSE: Value = Value("False")
+  val EXPIRED: Value = Value("Expired")
+}
+
+object ErrorMessageEnum extends Enumeration {
+  type ErrorMessage = Value
+
+  val SMW: Value = Value("Oops, something went worng!")
+  val INVALID_PARAM: Value = Value("Invalid Pramaters")
+  val NO_CAPTCHA: Value = Value("No captcha for the provided parameters")
+}
diff --git a/src/main/scala/lc/core/captchaProviders.scala b/src/main/scala/lc/core/captchaProviders.scala
index 0277015..5af97a0 100644
--- a/src/main/scala/lc/core/captchaProviders.scala
+++ b/src/main/scala/lc/core/captchaProviders.scala
@@ -3,6 +3,7 @@ package lc.core
 import lc.captchas._
 import lc.captchas.interfaces.ChallengeProvider
 import lc.captchas.interfaces.Challenge
+import scala.collection.mutable.Map
 
 object CaptchaProviders {
   private val providers = Map(
@@ -21,10 +22,11 @@ object CaptchaProviders {
     }
   }
 
-  private val seed = System.currentTimeMillis.toString.substring(2, 6).toInt
+  private val seed = Config.seed
   private val random = new scala.util.Random(seed)
+  private val config = Config.captchaConfig
 
-  private def getNextRandomInt(max: Int) =
+  private def getNextRandomInt(max: Int): Int =
     random.synchronized {
       random.nextInt(max)
     }
@@ -33,9 +35,31 @@ object CaptchaProviders {
     return providers(id)
   }
 
-  def getProvider(): ChallengeProvider = {
-    val keys = providers.keys
-    val providerIndex = keys.toVector(getNextRandomInt(keys.size))
-    providers(providerIndex)
+  private def filterProviderByParam(param: Parameters): Iterable[(String, String)] = {
+    val configFilter = for {
+      configValue <- config
+      if configValue.allowedLevels.contains(param.level)
+      if configValue.allowedMedia.contains(param.media)
+      if configValue.allowedInputType.contains(param.input_type)
+    } yield (configValue.name, configValue.config)
+
+    val providerFilter = for {
+      providerValue <- configFilter
+      providerConfigMap = providers(providerValue._1).supportedParameters()
+      if providerConfigMap.get(ParametersEnum.SUPPORTEDLEVEL.toString).contains(param.level)
+      if providerConfigMap.get(ParametersEnum.SUPPORTEDMEDIA.toString).contains(param.media)
+      if providerConfigMap.get(ParametersEnum.SUPPORTEDINPUTTYPE.toString).contains(param.input_type)
+    } yield (providerValue._1, providerValue._2)
+
+    providerFilter
+  }
+
+  def getProvider(param: Parameters): ChallengeProvider = {
+    val providerConfig = filterProviderByParam(param).toList
+    val randomIndex = getNextRandomInt(providerConfig.length)
+    val providerIndex = providerConfig(randomIndex)._1
+    val selectedProvider = providers(providerIndex)
+    selectedProvider.configure(providerConfig(randomIndex)._2)
+    selectedProvider
   }
 }
diff --git a/src/main/scala/lc/core/config.scala b/src/main/scala/lc/core/config.scala
new file mode 100644
index 0000000..2bf02be
--- /dev/null
+++ b/src/main/scala/lc/core/config.scala
@@ -0,0 +1,48 @@
+package lc.core
+
+import scala.io.Source.fromFile
+import org.json4s.{DefaultFormats, JValue, JObject, JField, JString}
+import org.json4s.jackson.JsonMethods.parse
+
+object Config {
+
+  implicit val formats: DefaultFormats.type = DefaultFormats
+
+  private val configFile = fromFile("config.json")
+  private val configString =
+    try configFile.mkString
+    finally configFile.close
+  private val configJson = parse(configString)
+
+  val port: Int = (configJson \ "port").extract[Int]
+  val throttle: Int = (configJson \ "throttle").extract[Int]
+  val seed: Int = (configJson \ "randomSeed").extract[Int]
+  val captchaExpiryTimeLimit: Int = (configJson \ "captchaExpiryTimeLimit").extract[Int]
+  val threadDelay: Int = (configJson \ "threadDelay").extract[Int]
+
+  private val captchaConfigJson = (configJson \ "captchas")
+  val captchaConfigTransform: JValue = captchaConfigJson transformField {
+    case JField("config", JObject(config)) => ("config", JString(config.toString))
+  }
+  val captchaConfig: List[CaptchaConfig] = captchaConfigTransform.extract[List[CaptchaConfig]]
+  val allowedLevels: Set[String] = getAllValues(configJson, ParametersEnum.ALLOWEDLEVELS.toString)
+  val allowedMedia: Set[String] = getAllValues(configJson, ParametersEnum.ALLOWEDMEDIA.toString)
+  val allowedInputType: Set[String] = getAllValues(configJson, ParametersEnum.ALLOWEDINPUTTYPE.toString)
+
+  private def getAllValues(config: JValue, param: String): Set[String] = {
+    val configValues = (config \\ param)
+    val result = for {
+      JObject(child) <- configValues
+      JField(param) <- child
+    } yield (param)
+
+    var valueSet = Set[String]()
+    for (valueList <- result) {
+      for (value <- valueList._2.children) {
+        valueSet += value.values.toString
+      }
+    }
+    valueSet
+  }
+
+}
diff --git a/src/main/scala/lc/core/models.scala b/src/main/scala/lc/core/models.scala
index 2e6f48c..4c16333 100644
--- a/src/main/scala/lc/core/models.scala
+++ b/src/main/scala/lc/core/models.scala
@@ -1,7 +1,16 @@
 package lc.core
 
+sealed trait ChallengeResult
 case class Size(height: Int, width: Int)
 case class Parameters(level: String, media: String, input_type: String, size: Option[Size])
-case class Id(id: String)
+case class Id(id: String) extends ChallengeResult
+case class Error(message: String) extends ChallengeResult
 case class Answer(answer: String, id: String)
 case class Result(result: String)
+case class CaptchaConfig(
+    name: String,
+    allowedLevels: List[String],
+    allowedMedia: List[String],
+    allowedInputType: List[String],
+    config: String
+)
diff --git a/src/main/scala/lc/database/statements.scala b/src/main/scala/lc/database/statements.scala
index 24bfe24..1439b56 100644
--- a/src/main/scala/lc/database/statements.scala
+++ b/src/main/scala/lc/database/statements.scala
@@ -15,6 +15,8 @@ class Statements(dbConn: DBConn) {
       "secret varchar, " +
       "provider varchar, " +
       "contentType varchar, " +
+      "contentLevel varchar, " +
+      "contentInput varchar, " +
       "image blob, " +
       "attempted int default 0, " +
       "PRIMARY KEY(token))"
@@ -32,8 +34,8 @@ class Statements(dbConn: DBConn) {
 
   val insertPstmt: PreparedStatement = dbConn.con.prepareStatement(
     "INSERT INTO " +
-      "challenge(id, secret, provider, contentType, image) " +
-      "VALUES (?, ?, ?, ?, ?)",
+      "challenge(id, secret, provider, contentType, contentLevel, contentInput, image) " +
+      "VALUES (?, ?, ?, ?, ?, ?, ?)",
     Statement.RETURN_GENERATED_KEYS
   )
 
@@ -48,7 +50,7 @@ class Statements(dbConn: DBConn) {
     "SELECT c.secret, c.provider " +
       "FROM challenge c, mapId m " +
       "WHERE m.token=c.token AND " +
-      "DATEDIFF(MINUTE, CURRENT_TIMESTAMP, DATEADD(MINUTE, 1, m.lastServed)) > 0 AND " +
+      "DATEDIFF(MINUTE, CURRENT_TIMESTAMP, DATEADD(MINUTE, ?, m.lastServed)) > 0 AND " +
       "m.uuid = ?"
   )
 
@@ -71,7 +73,10 @@ class Statements(dbConn: DBConn) {
   val tokenPstmt: PreparedStatement = dbConn.con.prepareStatement(
     "SELECT token " +
       "FROM challenge " +
-      "WHERE attempted < 10 " +
+      "WHERE attempted < 10 AND " +
+      "contentLevel = ? AND " +
+      "contentType = ? AND " +
+      "contentInput = ? " +
       "ORDER BY RAND() LIMIT 1"
   )
 
@@ -86,7 +91,7 @@ class Statements(dbConn: DBConn) {
   )
 
   val mapIdGCPstmt: PreparedStatement = dbConn.con.prepareStatement(
-    "DELETE FROM mapId WHERE DATEDIFF(MINUTE, CURRENT_TIMESTAMP, DATEADD(MINUTE, 1, lastServed)) < 0"
+    "DELETE FROM mapId WHERE DATEDIFF(MINUTE, CURRENT_TIMESTAMP, DATEADD(MINUTE, ?, lastServed)) < 0"
   )
 
   val getCountChallengeTable: PreparedStatement = dbConn.con.prepareStatement(
diff --git a/tests/locustfile.py b/tests/locustfile.py
index d3a72b0..54774e0 100644
--- a/tests/locustfile.py
+++ b/tests/locustfile.py
@@ -7,31 +7,32 @@ class QuickStartUser(SequentialTaskSet):
 
     @task
     def captcha(self):
-        captcha_params = {"level":"some","media":"some","input_type":"some"}
+        # TODO: Iterate over parameters for a more comprehensive test
+        captcha_params = {"level":"easy","media":"image/png","input_type":"text"}
 
         resp = self.client.post(path="/v1/captcha", json=captcha_params, name="/captcha")
         if resp.status_code != 200:
             print("\nError on /captcha endpoint: ")
             print(resp)
             print(resp.text)
-            print("----------------END.C-------------------\n\n")
+            print("----------------END.CAPTCHA-------------------\n\n")
         
         uuid = json.loads(resp.text).get("id")
         answerBody = {"answer": "qwer123","id": uuid}
 
         resp = self.client.get(path="/v1/media?id=%s" % uuid, name="/media")
         if resp.status_code != 200:
-            print("\nError on /captcha endpoint: ")
+            print("\nError on /media endpoint: ")
             print(resp)
             print(resp.text)
-            print("----------------END.C-------------------\n\n")
+            print("----------------END.MEDIA-------------------\n\n")
 
         resp = self.client.post(path='/v1/answer', json=answerBody, name="/answer")
         if resp.status_code != 200:
-            print("\nError on /captcha endpoint: ")
+            print("\nError on /answer endpoint: ")
             print(resp)
             print(resp.text)
-            print("----------------END.C-------------------\n\n")
+            print("----------------END.ANSWER-------------------\n\n")
 
 
 class User(FastHttpUser):