diff --git a/consentium/build.gradle.kts b/consentium/build.gradle.kts
index d4d5e77..e020f67 100644
--- a/consentium/build.gradle.kts
+++ b/consentium/build.gradle.kts
@@ -3,6 +3,7 @@ plugins {
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.hilt)
     alias(libs.plugins.ksp)
+    alias(libs.plugins.serialization)
 }
 
 android {
@@ -43,6 +44,22 @@ dependencies {
     implementation(libs.hilt.android)
     ksp(libs.hilt.compiler)
 
+    // Serialization
+    implementation(libs.serializationJson)
+
+    // Retrofit
+    api(libs.retrofit)
+    implementation(libs.retrofitConverter)
+    implementation(libs.logging.interceptor)
+
+    // OkHttp
+    api(libs.okhttp)
+    implementation(platform(libs.okhttp.bom))
+    implementation(libs.okhttp)
+
+    // Timber
+    implementation(libs.timber)
+
     // Test
     testImplementation(libs.test.junit)
     androidTestImplementation(libs.androidx.junit)
diff --git a/consentium/src/debug/kotlin/fr/openium/consentium/DebugNetworkModule.kt b/consentium/src/debug/kotlin/fr/openium/consentium/DebugNetworkModule.kt
new file mode 100644
index 0000000..c09d32a
--- /dev/null
+++ b/consentium/src/debug/kotlin/fr/openium/consentium/DebugNetworkModule.kt
@@ -0,0 +1,37 @@
+package fr.openium.consentium
+
+import android.content.Context
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import fr.openium.consentium.data.di.ConsentiumUrl
+import fr.openium.consentium.data.di.NetworkModule
+import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import timber.log.Timber
+
+@Module
+@InstallIn(SingletonComponent::class)
+class DebugNetworkModule {
+
+    @Provides
+    fun provideOkHttpBuilder(
+        @ApplicationContext context: Context,
+    ): OkHttpClient.Builder =
+        NetworkModule.standardOkHttpBuilder(context)
+            .addNetworkInterceptor(HttpLoggingInterceptor { message ->
+                Timber.tag("OkHttp")
+                Timber.v(message)
+            }.apply {
+                level = HttpLoggingInterceptor.Level.BODY
+            })
+
+    @ConsentiumUrl
+    @Provides
+    fun okHttpUrlConsentium(@ApplicationContext context: Context): HttpUrl =
+        context.getString(R.string.backend_url).toHttpUrl()
+}
\ No newline at end of file
diff --git a/consentium/src/debug/res/values/strings.xml b/consentium/src/debug/res/values/strings.xml
new file mode 100644
index 0000000..c04ccc1
--- /dev/null
+++ b/consentium/src/debug/res/values/strings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string name="backend_url" translatable="false" tools:ignore="UnusedResources">https://consentium-api-dev.openium.fr/api/v1/app</string>
+</resources>
\ No newline at end of file
diff --git a/consentium/src/main/java/fr/openium/consentium/data/di/NetworkModule.kt b/consentium/src/main/java/fr/openium/consentium/data/di/NetworkModule.kt
new file mode 100644
index 0000000..3680992
--- /dev/null
+++ b/consentium/src/main/java/fr/openium/consentium/data/di/NetworkModule.kt
@@ -0,0 +1,78 @@
+package fr.openium.consentium.data.di
+
+import android.content.Context
+import dagger.Lazy
+import dagger.Module
+import dagger.Provides
+import dagger.Reusable
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import fr.openium.consentium.data.remote.ConsentiumApi
+import kotlinx.serialization.json.Json
+import okhttp3.Cache
+import okhttp3.HttpUrl
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import retrofit2.converter.kotlinx.serialization.asConverterFactory
+import java.util.concurrent.TimeUnit
+import javax.inject.Qualifier
+import javax.inject.Singleton
+
+private val json by lazy {
+    Json {
+        isLenient = true
+        ignoreUnknownKeys = true
+    }
+}
+
+@Module
+@InstallIn(SingletonComponent::class)
+internal object NetworkModule {
+
+    @OkHttpClientDefault
+    @Provides
+    @Singleton
+    fun okHttpClientDefault(
+        okHttpBuilder: OkHttpClient.Builder,
+    ): OkHttpClient = okHttpBuilder.build()
+
+    fun standardOkHttpBuilder(
+        context: Context,
+    ): OkHttpClient.Builder {
+        val cacheSize = (20 * 1024 * 1024).toLong() // 20 MiB
+        val cache = Cache(context.cacheDir, cacheSize)
+        return OkHttpClient.Builder()
+            .cache(cache)
+            .connectTimeout(10, TimeUnit.SECONDS)
+            .readTimeout(10, TimeUnit.SECONDS)
+            .writeTimeout(10, TimeUnit.SECONDS)
+    }
+
+    @Reusable
+    @Provides
+    fun provideConsentiumApi(
+        @ConsentiumUrl url: HttpUrl,
+        @OkHttpClientDefault okHttpClient: Lazy<OkHttpClient>,
+    ): ConsentiumApi =
+        createRetrofit(
+            url,
+            okHttpClient
+        ).create(ConsentiumApi::class.java)
+
+    private fun createRetrofit(url: HttpUrl, okHttpClient: Lazy<OkHttpClient>): Retrofit =
+        Retrofit.Builder()
+            .callFactory { request ->
+                okHttpClient.get().newCall(request)
+            }.addConverterFactory(json.asConverterFactory("application/json".toMediaType()))
+            .baseUrl(url)
+            .build()
+}
+
+@Qualifier
+@Retention(AnnotationRetention.BINARY)
+internal annotation class ConsentiumUrl
+
+@Qualifier
+@Retention(AnnotationRetention.BINARY)
+internal annotation class OkHttpClientDefault
diff --git a/consentium/src/main/java/fr/openium/consentium/data/remote/ConsentiumApi.kt b/consentium/src/main/java/fr/openium/consentium/data/remote/ConsentiumApi.kt
new file mode 100644
index 0000000..4f3847d
--- /dev/null
+++ b/consentium/src/main/java/fr/openium/consentium/data/remote/ConsentiumApi.kt
@@ -0,0 +1,25 @@
+package fr.openium.consentium.data.remote
+
+import fr.openium.consentium.data.remote.model.GetConsent
+import fr.openium.consentium.data.remote.model.PatchConsent
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.PATCH
+
+
+internal interface ConsentiumApi {
+
+    @GET("/consents")
+    suspend fun getConsents(
+        applicationId: String,
+        installationId: String,
+    ): GetConsent.GetConsentPayloadDTO
+
+    @PATCH("/consents")
+    suspend fun setConsents(
+        applicationId: String,
+        installationId: String,
+        @Body patchConsent: PatchConsent.PatchConsentPayloadDTO,
+    ): Any
+
+}
\ No newline at end of file
diff --git a/consentium/src/main/java/fr/openium/consentium/data/remote/model/GetConsentPayloadDTO.kt b/consentium/src/main/java/fr/openium/consentium/data/remote/model/GetConsentPayloadDTO.kt
new file mode 100644
index 0000000..3206996
--- /dev/null
+++ b/consentium/src/main/java/fr/openium/consentium/data/remote/model/GetConsentPayloadDTO.kt
@@ -0,0 +1,44 @@
+package fr.openium.consentium.data.remote.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+internal sealed interface GetConsent {
+
+    @Serializable
+    data class GetConsentPayloadDTO(
+        @SerialName("installationId") val installationId: String,
+        @SerialName("purposes") val purposes: List<PurposeDTO>? = null,
+        @SerialName("isValid") val isValid: Boolean,
+    )
+
+    @Serializable
+    data class PurposeDTO(
+        @SerialName("identifier") val identifier: String,
+        @SerialName("isRequired") val isRequired: Boolean,
+        @SerialName("isAccepted") val isAccepted: PurposeStatus,
+        @SerialName("vendors") val vendors: List<VendorDTO>? = null,
+    )
+
+    @Serializable
+    data class VendorDTO(
+        @SerialName("identifier") val identifier: String,
+        @SerialName("isRequired") val isRequired: Boolean,
+        @SerialName("isAccepted") val isAccepted: Boolean,
+    )
+
+    @Serializable
+    enum class PurposeStatus {
+        @SerialName("ACCEPTED")
+        ACCEPTED,
+
+        @SerialName("REJECTED")
+        REJECTED,
+
+        @SerialName("NOT_DEFINED")
+        NOT_DEFINED,
+    }
+
+}
+
+
diff --git a/consentium/src/main/java/fr/openium/consentium/data/remote/model/PatchConsentPayloadDTO.kt b/consentium/src/main/java/fr/openium/consentium/data/remote/model/PatchConsentPayloadDTO.kt
new file mode 100644
index 0000000..f7a6202
--- /dev/null
+++ b/consentium/src/main/java/fr/openium/consentium/data/remote/model/PatchConsentPayloadDTO.kt
@@ -0,0 +1,27 @@
+package fr.openium.consentium.data.remote.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+internal sealed interface PatchConsent {
+
+    @Serializable
+    data class PatchConsentPayloadDTO(
+        @SerialName("installationId") val installationId: String,
+        @SerialName("purposes") val purposes: List<PurposeDTO>? = null,
+    )
+
+    @Serializable
+    data class PurposeDTO(
+        @SerialName("identifier") val identifier: String,
+        @SerialName("isAccepted") val isAccepted: Boolean,
+        @SerialName("vendors") val vendors: List<VendorDTO>? = null,
+    )
+
+    @Serializable
+    data class VendorDTO(
+        @SerialName("identifier") val identifier: String,
+        @SerialName("isAccepted") val isAccepted: Boolean,
+    )
+
+}
diff --git a/consentium/src/main/java/fr/openium/consentium/data/repository/ConsentiumRepository.kt b/consentium/src/main/java/fr/openium/consentium/data/repository/ConsentiumRepository.kt
new file mode 100644
index 0000000..f553d83
--- /dev/null
+++ b/consentium/src/main/java/fr/openium/consentium/data/repository/ConsentiumRepository.kt
@@ -0,0 +1,13 @@
+package fr.openium.consentium.data.repository
+
+import fr.openium.consentium.data.local.ConsentiumDataStore
+import fr.openium.consentium.data.remote.ConsentiumApi
+import javax.inject.Inject
+
+internal class ConsentiumRepository @Inject constructor(
+    private val consentiumApi: ConsentiumApi,
+    private val consentiumDataStore: ConsentiumDataStore,
+) {
+
+
+}
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b58fe56..363d9b1 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -26,6 +26,17 @@ timber = "5.0.1"
 # Material
 material = "1.12.0"
 
+# Serialization
+serialization = "2.0.21"
+jsonSerialization = "1.7.3"
+
+# Retrofit
+retrofit = "2.11.0"
+loggingInterceptor = "4.12.0"
+
+# Okhttp
+okhttpBom = "4.12.0"
+
 # Test
 junit = "4.13.2"
 espressoCore = "3.6.1"
@@ -94,6 +105,18 @@ androidx-navigation-compose = { group = "androidx.navigation", name = "navigatio
 # Preferences DataStore
 preferencesDataStore = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "preferencesDataStore" }
 
+# Json serialization
+serializationJson = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version.ref = "jsonSerialization" }
+
+# Retrofit
+retrofit = { group = "com.squareup.retrofit2", name = "retrofit", version.ref = "retrofit" }
+retrofitConverter = { group = "com.squareup.retrofit2", name = "converter-kotlinx-serialization", version.ref = "retrofit" }
+logging-interceptor = { module = "com.squareup.okhttp3:logging-interceptor", version.ref = "loggingInterceptor" }
+
+# Okhttp
+okhttp-bom = { module = "com.squareup.okhttp3:okhttp-bom", version.ref = "okhttpBom" }
+okhttp = { module = "com.squareup.okhttp3:okhttp" }
+
 # Test
 test-junit = { group = "junit", name = "junit", version.ref = "junit" }
 test-androidx-junit = { group = "androidx.test.ext", name = "junit-ktx", version.ref = "junitExtVersion" }
@@ -107,9 +130,7 @@ kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "ko
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
 android-library = { id = "com.android.library", version.ref = "agp" }
 hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
-kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
-
-
+serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "serialization" }
 
 [bundles]
 androidx = ["androidx-core-ktx", "androidx-activity-compose"]