diff --git a/kotlin-oauth2-server-core/src/main/java/nl/myndocs/oauth2/CallRouter.kt b/kotlin-oauth2-server-core/src/main/java/nl/myndocs/oauth2/CallRouter.kt
index 7a109ba..6a7e332 100644
--- a/kotlin-oauth2-server-core/src/main/java/nl/myndocs/oauth2/CallRouter.kt
+++ b/kotlin-oauth2-server-core/src/main/java/nl/myndocs/oauth2/CallRouter.kt
@@ -125,8 +125,8 @@ class CallRouter(
 
             callContext.redirect(queryParameters["redirect_uri"] + "?code=${redirect.codeToken}$stateQueryParameter")
         } catch (unverifiedIdentityException: InvalidIdentityException) {
-            authorizer.failedAuthentication()
             callContext.respondStatus(STATUS_UNAUTHORIZED)
+            authorizer.failedAuthentication()
         }
     }
 
diff --git a/kotlin-oauth2-server-sparkjava/pom.xml b/kotlin-oauth2-server-sparkjava/pom.xml
new file mode 100644
index 0000000..e737886
--- /dev/null
+++ b/kotlin-oauth2-server-sparkjava/pom.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>kotlin-oauth2-server</artifactId>
+        <groupId>nl.myndocs</groupId>
+        <version>0.1.1</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>kotlin-oauth2-server-sparkjava</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.sparkjava</groupId>
+            <artifactId>spark-core</artifactId>
+            <version>2.5.4</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>nl.myndocs</groupId>
+            <artifactId>kotlin-oauth2-server-core</artifactId>
+            <version>${project.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.5</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/Oauth2Server.kt b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/Oauth2Server.kt
new file mode 100644
index 0000000..e8606c0
--- /dev/null
+++ b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/Oauth2Server.kt
@@ -0,0 +1,36 @@
+package nl.myndocs.oauth2.sparkjava
+
+import nl.myndocs.oauth2.config.ConfigurationBuilder
+import nl.myndocs.oauth2.sparkjava.request.SparkjavaCallContext
+import spark.Spark.get
+import spark.Spark.post
+
+object Oauth2Server {
+    fun configureOauth2Server(configurationCallback: ConfigurationBuilder.Configuration.() -> Unit) {
+        val configuration = ConfigurationBuilder.build(configurationCallback)
+
+        val callRouter = configuration.callRouter
+
+        post(callRouter.tokenEndpoint) { req, res ->
+            val sparkjavaCallContext = SparkjavaCallContext(req, res)
+            callRouter.route(sparkjavaCallContext, configuration.authorizerFactory(sparkjavaCallContext))
+
+            res.body()
+        }
+
+
+        get(callRouter.authorizeEndpoint) { req, res ->
+            val sparkjavaCallContext = SparkjavaCallContext(req, res)
+            callRouter.route(sparkjavaCallContext, configuration.authorizerFactory(sparkjavaCallContext))
+
+            res.body()
+        }
+
+        get(callRouter.userInfoEndpoint) { req, res ->
+            val sparkjavaCallContext = SparkjavaCallContext(req, res)
+            callRouter.route(sparkjavaCallContext, configuration.authorizerFactory(sparkjavaCallContext))
+
+            res.body()
+        }
+    }
+}
\ No newline at end of file
diff --git a/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/json/JsonMapper.kt b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/json/JsonMapper.kt
new file mode 100644
index 0000000..5286b4e
--- /dev/null
+++ b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/json/JsonMapper.kt
@@ -0,0 +1,9 @@
+package nl.myndocs.oauth2.sparkjava.json
+
+import com.google.gson.Gson
+
+object JsonMapper {
+    private val gson = Gson()
+
+    fun toJson(content: Any) = gson.toJson(content)
+}
\ No newline at end of file
diff --git a/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/request/SparkjavaCallContext.kt b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/request/SparkjavaCallContext.kt
new file mode 100644
index 0000000..f47d713
--- /dev/null
+++ b/kotlin-oauth2-server-sparkjava/src/main/java/nl/myndocs/oauth2/sparkjava/request/SparkjavaCallContext.kt
@@ -0,0 +1,37 @@
+package nl.myndocs.oauth2.sparkjava.request
+
+import nl.myndocs.oauth2.request.CallContext
+import nl.myndocs.oauth2.sparkjava.json.JsonMapper
+import spark.Request
+import spark.Response
+
+class SparkjavaCallContext(val request: Request, val response: Response) : CallContext {
+    override val path: String = request.pathInfo()
+    override val method: String = request.requestMethod()
+    override val headers: Map<String, String> = request.headers()
+            .map { it.toLowerCase() to request.headers(it) }
+            .toMap()
+
+    override val queryParameters: Map<String, String> = request.queryParams()
+            .map { it.toLowerCase() to request.queryParams(it) }
+            .toMap()
+
+    override val formParameters: Map<String, String> = queryParameters
+
+    override fun respondStatus(statusCode: Int) {
+        response.status(statusCode)
+        response.body("")
+    }
+
+    override fun respondHeader(name: String, value: String) {
+        response.header(name, value)
+    }
+
+    override fun respondJson(content: Any) {
+        response.body(JsonMapper.toJson(content))
+    }
+
+    override fun redirect(uri: String) {
+        response.redirect(uri)
+    }
+}
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 19cd8cc..91ce3eb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,6 +22,7 @@
         <module>kotlin-oauth2-server-identity-inmemory</module>
         <module>kotlin-oauth2-server-token-store-inmemory</module>
         <module>kotlin-oauth2-server-javalin</module>
+        <module>kotlin-oauth2-server-sparkjava</module>
     </modules>
 
     <dependencies>