diff --git a/CHANGES.md b/CHANGES.md
index 55c7387379..ce3281d987 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,7 @@ Improvements 🙌:
  - Crypto improvement | Bulk send NO_OLM withheld code
  - Display the room shield in all room setting screens
  - Improve message with Emoji only detection (#3017)
+ - Api interceptor to allow app developers peek responses (#2986)
 
 Bugfix 🐛:
  - Fix bad theme change for the MainActivity
diff --git a/matrix-sdk-android/build.gradle b/matrix-sdk-android/build.gradle
index 5ca5ce1e05..7fb626ab46 100644
--- a/matrix-sdk-android/build.gradle
+++ b/matrix-sdk-android/build.gradle
@@ -185,7 +185,6 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
     androidTestImplementation 'org.amshove.kluent:kluent-android:1.61'
-    // Note: version sticks to 1.9.2 due to https://github.com/mockk/mockk/issues/281
     androidTestImplementation 'io.mockk:mockk-android:1.11.0'
     androidTestImplementation "androidx.arch.core:core-testing:$arch_version"
     androidTestImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$kotlin_coroutines_version"
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/InstrumentedTest.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/InstrumentedTest.kt
index b784884363..583406346e 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/InstrumentedTest.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/InstrumentedTest.kt
@@ -20,7 +20,6 @@ import android.content.Context
 import androidx.test.core.app.ApplicationProvider
 import org.matrix.android.sdk.test.shared.createTimberTestRule
 import org.junit.Rule
-import java.io.File
 
 interface InstrumentedTest {
 
@@ -30,8 +29,4 @@ interface InstrumentedTest {
     fun context(): Context {
         return ApplicationProvider.getApplicationContext()
     }
-
-    fun cacheDir(): File {
-        return context().cacheDir
-    }
 }
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/Matrix.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/Matrix.kt
index 03943cea14..c439da8407 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/Matrix.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/Matrix.kt
@@ -27,9 +27,12 @@ import org.matrix.android.sdk.BuildConfig
 import org.matrix.android.sdk.api.auth.AuthenticationService
 import org.matrix.android.sdk.api.auth.HomeServerHistoryService
 import org.matrix.android.sdk.api.legacy.LegacySessionImporter
+import org.matrix.android.sdk.api.network.ApiInterceptorListener
+import org.matrix.android.sdk.api.network.ApiPath
 import org.matrix.android.sdk.api.raw.RawService
 import org.matrix.android.sdk.common.DaggerTestMatrixComponent
 import org.matrix.android.sdk.internal.SessionManager
+import org.matrix.android.sdk.internal.network.ApiInterceptor
 import org.matrix.android.sdk.internal.network.UserAgentHolder
 import org.matrix.android.sdk.internal.util.BackgroundDetectionObserver
 import org.matrix.olm.OlmManager
@@ -51,6 +54,7 @@ class Matrix private constructor(context: Context, matrixConfiguration: MatrixCo
     @Inject internal lateinit var olmManager: OlmManager
     @Inject internal lateinit var sessionManager: SessionManager
     @Inject internal lateinit var homeServerHistoryService: HomeServerHistoryService
+    @Inject internal lateinit var apiInterceptor: ApiInterceptor
 
     private val uiHandler = Handler(Looper.getMainLooper())
 
@@ -79,6 +83,14 @@ class Matrix private constructor(context: Context, matrixConfiguration: MatrixCo
         return legacySessionImporter
     }
 
+    fun registerApiInterceptorListener(path: ApiPath, listener: ApiInterceptorListener) {
+        apiInterceptor.addListener(path, listener)
+    }
+
+    fun unregisterApiInterceptorListener(path: ApiPath, listener: ApiInterceptorListener) {
+        apiInterceptor.removeListener(path, listener)
+    }
+
     companion object {
 
         private lateinit var instance: Matrix
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/network/ApiInterceptorTest.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/network/ApiInterceptorTest.kt
new file mode 100644
index 0000000000..9371154aaf
--- /dev/null
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/api/network/ApiInterceptorTest.kt
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.network
+
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.FixMethodOrder
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.junit.runners.MethodSorters
+import org.matrix.android.sdk.InstrumentedTest
+import org.matrix.android.sdk.common.CommonTestHelper
+import org.matrix.android.sdk.common.SessionTestParams
+import org.matrix.android.sdk.common.TestConstants
+import timber.log.Timber
+
+@RunWith(JUnit4::class)
+@FixMethodOrder(MethodSorters.JVM)
+class ApiInterceptorTest : InstrumentedTest {
+
+    private val commonTestHelper = CommonTestHelper(context())
+
+    @Test
+    fun apiInterceptorTest() {
+        val responses = mutableListOf<String>()
+
+        val listener = object : ApiInterceptorListener {
+            override fun onApiResponse(path: ApiPath, response: String) {
+                Timber.w("onApiResponse($path): $response")
+                responses.add(response)
+            }
+        }
+
+        commonTestHelper.matrix.registerApiInterceptorListener(ApiPath.REGISTER, listener)
+
+        val session = commonTestHelper.createAccount(TestConstants.USER_ALICE, SessionTestParams(withInitialSync = true))
+
+        commonTestHelper.signOutAndClose(session)
+
+        commonTestHelper.matrix.unregisterApiInterceptorListener(ApiPath.REGISTER, listener)
+
+        responses.size shouldBeEqualTo 2
+    }
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/Matrix.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/Matrix.kt
index a5d457222f..9980259266 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/Matrix.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/Matrix.kt
@@ -25,9 +25,12 @@ import org.matrix.android.sdk.BuildConfig
 import org.matrix.android.sdk.api.auth.AuthenticationService
 import org.matrix.android.sdk.api.auth.HomeServerHistoryService
 import org.matrix.android.sdk.api.legacy.LegacySessionImporter
+import org.matrix.android.sdk.api.network.ApiInterceptorListener
+import org.matrix.android.sdk.api.network.ApiPath
 import org.matrix.android.sdk.api.raw.RawService
 import org.matrix.android.sdk.internal.SessionManager
 import org.matrix.android.sdk.internal.di.DaggerMatrixComponent
+import org.matrix.android.sdk.internal.network.ApiInterceptor
 import org.matrix.android.sdk.internal.network.UserAgentHolder
 import org.matrix.android.sdk.internal.util.BackgroundDetectionObserver
 import org.matrix.olm.OlmManager
@@ -49,6 +52,7 @@ class Matrix private constructor(context: Context, matrixConfiguration: MatrixCo
     @Inject internal lateinit var olmManager: OlmManager
     @Inject internal lateinit var sessionManager: SessionManager
     @Inject internal lateinit var homeServerHistoryService: HomeServerHistoryService
+    @Inject internal lateinit var apiInterceptor: ApiInterceptor
 
     init {
         Monarchy.init(context)
@@ -73,6 +77,14 @@ class Matrix private constructor(context: Context, matrixConfiguration: MatrixCo
         return legacySessionImporter
     }
 
+    fun registerApiInterceptorListener(path: ApiPath, listener: ApiInterceptorListener) {
+        apiInterceptor.addListener(path, listener)
+    }
+
+    fun unregisterApiInterceptorListener(path: ApiPath, listener: ApiInterceptorListener) {
+        apiInterceptor.removeListener(path, listener)
+    }
+
     companion object {
 
         private lateinit var instance: Matrix
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiInterceptorListener.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiInterceptorListener.kt
new file mode 100644
index 0000000000..ad21da8fdf
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiInterceptorListener.kt
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2021 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.network
+
+interface ApiInterceptorListener {
+    fun onApiResponse(path: ApiPath, response: String)
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiPath.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiPath.kt
new file mode 100644
index 0000000000..db112a30b2
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/network/ApiPath.kt
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2021 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.network
+
+import org.matrix.android.sdk.internal.network.NetworkConstants
+
+enum class ApiPath(val path: String, val method: String) {
+    // AuthApi
+    VERSIONS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "versions", "GET"),
+    REGISTER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "register", "POST"),
+    ADD_3PID(NetworkConstants.URI_API_PREFIX_PATH_R0 + "register/{threePid}/requestToken", "POST"),
+    LOGIN_FLOWS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "login", "GET"),
+    LOGIN(NetworkConstants.URI_API_PREFIX_PATH_R0 + "login", "POST"),
+    RESET_PASSWORD(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/password/email/requestToken", "POST"),
+    RESET_PASSWORD_MAIL_CONFIRMED(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/password", "POST"),
+
+    // DirectoryApi
+    ROOM_ID_BY_ALIAS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "directory/room/{roomAlias}", "GET"),
+    ROOM_DIRECTORY_VISIBILITY(NetworkConstants.URI_API_PREFIX_PATH_R0 + "directory/list/room/{roomId}", "GET"),
+    SET_ROOM_DIRECTORY_VISIBILITY(NetworkConstants.URI_API_PREFIX_PATH_R0 + "directory/list/room/{roomId}", "PUT"),
+    ADD_ROOM_ALIAS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "directory/room/{roomAlias}", "PUT"),
+    DELETE_ROOM_ALIAS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "directory/room/{roomAlias}", "DELETE"),
+
+    // CryptoApi
+    GET_DEVICES(NetworkConstants.URI_API_PREFIX_PATH_R0 + "devices", "GET"),
+    GET_DEVICE_INFO(NetworkConstants.URI_API_PREFIX_PATH_R0 + "devices/{deviceId}", "GET"),
+    UPLOAD_KEYS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "keys/upload", "POST"),
+    DOWNLOAD_KEYS_FOR_USERS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "keys/query", "POST"),
+    UPLOAD_SIGNING_KEYS(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "keys/device_signing/upload", "POST"),
+    UPLOAD_SIGNATURES(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "keys/signatures/upload", "POST"),
+    CLAIM_ONE_TIME_KEYS_FOR_USERS_DEVICES(NetworkConstants.URI_API_PREFIX_PATH_R0 + "keys/claim", "POST"),
+    SEND_TO_DEVICE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "sendToDevice/{eventType}/{txnId}", "PUT"),
+    DELETE_DEVICE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "devices/{device_id}", "DELETE"),
+    UPDATE_DEVICE_INFO(NetworkConstants.URI_API_PREFIX_PATH_R0 + "devices/{device_id}", "PUT"),
+    GET_KEY_CHANGES(NetworkConstants.URI_API_PREFIX_PATH_R0 + "keys/changes", "GET"),
+
+    // RoomKeysApi
+    CREATE_KEYS_BACKUP_VERSION(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/version", "POST"),
+    GET_KEYS_BACKUP_LAST_VERSION(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/version", "GET"),
+    GET_KEYS_BACKUP_VERSION(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/version/{version}", "GET"),
+    UPDATE_KEYS_BACKUP_VERSION(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/version/{version}", "PUT"),
+    STORE_ROOM_SESSION_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}/{sessionId}", "PUT"),
+    STORE_ROOM_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}", "PUT"),
+    STORE_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys", "PUT"),
+    GET_ROOM_SESSION_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}/{sessionId}", "GET"),
+    GET_ROOM_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}", "GET"),
+    GET_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys", "GET"),
+    DELETE_ROOM_SESSION_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}/{sessionId}", "DELETE"),
+    DELETE_ROOM_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys/{roomId}", "DELETE"),
+    DELETE_SESSIONS_DATA(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/keys", "DELETE"),
+    DELETE_BACKUP(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "room_keys/version/{version}", "DELETE"),
+
+    // AccountApi
+    CHANGE_PASSWORD(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/password", "POST"),
+    DEACTIVATE_ACCOUNT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/deactivate", "POST"),
+
+    // SearchApi
+    SEARCH(NetworkConstants.URI_API_PREFIX_PATH_R0 + "search", "POST"),
+
+    // FederationApi
+    GET_FEDERATION_VERSION(NetworkConstants.URI_FEDERATION_PATH + "version", "GET"),
+
+    // VoipApi
+    GET_TURN_SERVER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "voip/turnServer", "GET"),
+
+    // PushGatewayApi
+    NOTIFY_PUSH_GATEWAY(NetworkConstants.URI_PUSH_GATEWAY_PREFIX_PATH + "notify", "POST"),
+
+    // GroupApi
+    GET_GROUP_SUMMARY(NetworkConstants.URI_API_PREFIX_PATH_R0 + "groups/{groupId}/summary", "GET"),
+    GET_GROUP_ROOMS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "groups/{groupId}/rooms", "GET"),
+    GET_GROUP_USERS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "groups/{groupId}/users", "GET"),
+
+    // CapabilitiesApi
+    GET_CAPABILITIES(NetworkConstants.URI_API_PREFIX_PATH_R0 + "capabilities", "GET"),
+    GET_VERSIONS(NetworkConstants.URI_API_PREFIX_PATH_ + "versions", "GET"),
+    PING(NetworkConstants.URI_API_PREFIX_PATH_ + "versions", "GET"),
+
+    // IdentityApi
+    GET_ACCOUNT(NetworkConstants.URI_IDENTITY_PATH_V2 + "account", "GET"),
+    LOGOUT(NetworkConstants.URI_IDENTITY_PATH_V2 + "account/logout", "POST"),
+    IDENTITY_HAS_DETAILS(NetworkConstants.URI_IDENTITY_PATH_V2 + "hash_details", "GET"),
+    LOOKUP(NetworkConstants.URI_IDENTITY_PATH_V2 + "lookup", "POST"),
+    REQUEST_TOKEN_TO_BIND_EMAIL(NetworkConstants.URI_IDENTITY_PATH_V2 + "validate/email/requestToken", "POST"),
+    REQUEST_TOKEN_TO_BIND_MSISDN(NetworkConstants.URI_IDENTITY_PATH_V2 + "validate/msisdn/requestToken", "POST"),
+    SUBMIT_TOKEN(NetworkConstants.URI_IDENTITY_PATH_V2 + "validate/{medium}/submitToken", "POST"),
+
+    // FilterApi
+    UPLOAD_FILTER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/filter", "POST"),
+    GET_FILTER_BY_ID(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/filter/{filterId}", "GET"),
+
+    // IndentityAuthApi
+    IDENTITY_REGISTER(NetworkConstants.URI_IDENTITY_PATH_V2 + "account/register", "POST"),
+
+    // MediaApi
+    GET_MEDIA_CONFIG(NetworkConstants.URI_API_MEDIA_PREFIX_PATH_R0 + "config", "GET"),
+    GET_PREVIEW_URL_DATA(NetworkConstants.URI_API_MEDIA_PREFIX_PATH_R0 + "preview_url", "GET"),
+
+    // OpenIdApi
+    OPEN_ID_TOKEN(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/openid/request_token", "POST"),
+
+    // ProfileApi
+    GET_PROFILE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "profile/{userId}", "GET"),
+    GET_THREE_PIDS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/3pid", "GET"),
+    SET_DISPLAY_NAME(NetworkConstants.URI_API_PREFIX_PATH_R0 + "profile/{userId}/displayname", "PUT"),
+    SET_AVATAR_URL(NetworkConstants.URI_API_PREFIX_PATH_R0 + "profile/{userId}/avatar_url", "PUT"),
+    BIND_THREE_PID(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "account/3pid/bind", "POST"),
+    UNBIND_THREE_PID(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "account/3pid/unbind", "POST"),
+    ADD_EMAIL(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/3pid/email/requestToken", "POST"),
+    ADD_MSISDN(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/3pid/msisdn/requestToken", "POST"),
+    FINALIZE_ADD_THREE_PID(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/3pid/add", "POST"),
+    DELETE_THREE_PID(NetworkConstants.URI_API_PREFIX_PATH_R0 + "account/3pid/delete", "POST"),
+
+    // PusherRulesApi
+    GET_ALL_PUSHER_RULES(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushrules/", "GET"),
+    UPDATE_ENABLE_PUSH_RULE_STATUS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushrules/global/{kind}/{ruleId}/enabled", "PUT"),
+    UPDATE_PUSH_RULE_ACTIONS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushrules/global/{kind}/{ruleId}/actions", "PUT"),
+    DELETE_PUSH_RULE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushrules/global/{kind}/{ruleId}", "DELETE"),
+    ADD_PUSH_RULE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushrules/global/{kind}/{ruleId}", "PUT"),
+
+    // PusherApi
+    GET_PUSHERS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushers", "GET"),
+    SET_PUSHER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "pushers/set", "POST"),
+
+    // SignOutApi
+    LOGIN_AGAIN(NetworkConstants.URI_API_PREFIX_PATH_R0 + "login", "POST"),
+    SIGN_OUT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "logout", "POST"),
+
+    // RoomApi
+    GET_PUBLIC_ROOMS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "publicRooms", "POST"),
+    CREATE_ROOM(NetworkConstants.URI_API_PREFIX_PATH_R0 + "createRoom", "POST"),
+    GET_ROOM_MESSAGES_FROM(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/messages", "GET"),
+    GET_MEMBERS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/members", "GET"),
+    SEND_EVENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/send/{eventType}/{txId}", "PUT"),
+    GET_CONTEXT_OF_EVENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/context/{eventId}", "GET"),
+    GET_EVENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/event/{eventId}", "GET"),
+    SEND_READ_MARKER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/read_markers", "POST"),
+    INVITE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/invite", "POST"),
+    INVITE_USING_THREE_PID(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/invite", "POST"),
+    SEND_STATE_EVENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/state/{state_event_type}", "PUT"),
+    SEND_STATE_EVENT_WITH_STATE_KEY(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/state/{state_event_type}/{state_key}", "PUT"),
+    GET_ROOM_STATE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/state", "GET"),
+    SEND_RELATION(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/send_relation/{parent_id}/{relation_type}/{event_type}", "POST"),
+    GET_RELATIONS(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "rooms/{roomId}/relations/{eventId}/{relationType}/{eventType}", "GET"),
+    JOIN_ROOM(NetworkConstants.URI_API_PREFIX_PATH_R0 + "join/{roomIdOrAlias}", "POST"),
+    LEAVE_ROOM(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/leave", "POST"),
+    BAN_USER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/ban", "POST"),
+    UNBAN_USER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/unban", "POST"),
+    KICK_USER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/kick", "POST"),
+    REDACT_EVENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/redact/{eventId}/{txnId}", "PUT"),
+    REPORT_CONTENT(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/report/{eventId}", "POST"),
+    GET_ALIASES(NetworkConstants.URI_API_PREFIX_PATH_UNSTABLE + "org.matrix.msc2432/rooms/{roomId}/aliases", "GET"),
+    SEND_TYPING_STATE(NetworkConstants.URI_API_PREFIX_PATH_R0 + "rooms/{roomId}/typing/{userId}", "PUT"),
+    PUT_TAG(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/rooms/{roomId}/tags/{tag}", "PUT"),
+    DELETE_TAG(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/rooms/{roomId}/tags/{tag}", "DELETE"),
+
+    // SyncApi
+    SYNC(NetworkConstants.URI_API_PREFIX_PATH_R0 + "sync", "GET"),
+
+    // ThirdPartyApi
+    THIRD_PARTY_PROTOCOLS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "thirdparty/protocols", "GET"),
+    THIRD_PARTY_USER(NetworkConstants.URI_API_PREFIX_PATH_R0 + "thirdparty/protocols/user/{protocol}", "GET"),
+
+    // SearchUserApi
+    SEARCH_USERS(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user_directory/search", "POST"),
+
+    // AccountDataApi
+    SET_ACCOUNT_DATA(NetworkConstants.URI_API_PREFIX_PATH_R0 + "user/{userId}/account_data/{type}", "PUT")
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/NetworkModule.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/NetworkModule.kt
index f4688411ff..0d0892b608 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/NetworkModule.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/NetworkModule.kt
@@ -28,6 +28,7 @@ import org.matrix.android.sdk.internal.network.interceptors.CurlLoggingIntercept
 import org.matrix.android.sdk.internal.network.interceptors.FormattedJsonHttpLogger
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
+import org.matrix.android.sdk.internal.network.ApiInterceptor
 import java.util.concurrent.TimeUnit
 
 @Module
@@ -63,7 +64,8 @@ internal object NetworkModule {
                              timeoutInterceptor: TimeOutInterceptor,
                              userAgentInterceptor: UserAgentInterceptor,
                              httpLoggingInterceptor: HttpLoggingInterceptor,
-                             curlLoggingInterceptor: CurlLoggingInterceptor): OkHttpClient {
+                             curlLoggingInterceptor: CurlLoggingInterceptor,
+                             apiInterceptor: ApiInterceptor): OkHttpClient {
         return OkHttpClient.Builder()
                 .connectTimeout(30, TimeUnit.SECONDS)
                 .readTimeout(60, TimeUnit.SECONDS)
@@ -76,6 +78,7 @@ internal object NetworkModule {
                 .addInterceptor(timeoutInterceptor)
                 .addInterceptor(userAgentInterceptor)
                 .addInterceptor(httpLoggingInterceptor)
+                .addInterceptor(apiInterceptor)
                 .apply {
                     if (BuildConfig.LOG_PRIVATE_DATA) {
                         addInterceptor(curlLoggingInterceptor)
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/network/ApiInterceptor.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/network/ApiInterceptor.kt
new file mode 100644
index 0000000000..1dd6e75ea5
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/network/ApiInterceptor.kt
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2021 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.network
+
+import okhttp3.Interceptor
+import okhttp3.Response
+import org.matrix.android.sdk.api.extensions.tryOrNull
+import org.matrix.android.sdk.api.network.ApiInterceptorListener
+import org.matrix.android.sdk.api.network.ApiPath
+import org.matrix.android.sdk.internal.di.MatrixScope
+import timber.log.Timber
+import javax.inject.Inject
+
+/**
+ * Interceptor class for provided api paths.
+ */
+@MatrixScope
+internal class ApiInterceptor @Inject constructor() : Interceptor {
+
+    init {
+        Timber.d("ApiInterceptor.init")
+    }
+
+    private val apiResponseListenersMap = mutableMapOf<ApiPath, MutableList<ApiInterceptorListener>>()
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request()
+        val path = request.url.encodedPath.replaceFirst("/", "")
+        val method = request.method
+
+        val response = chain.proceed(request)
+
+        synchronized(apiResponseListenersMap) {
+            findApiPath(path, method)?.let { apiPath ->
+                response.peekBody(Long.MAX_VALUE).string().let { networkResponse ->
+                    apiResponseListenersMap[apiPath]?.forEach { listener ->
+                        tryOrNull("Error in the implementation") {
+                            listener.onApiResponse(apiPath, networkResponse)
+                        }
+                    }
+                }
+            }
+        }
+
+        return response
+    }
+
+    private fun findApiPath(path: String, method: String): ApiPath? {
+        return apiResponseListenersMap
+                .keys
+                .find { apiPath ->
+                    apiPath.method === method && isTheSamePath(apiPath.path, path)
+                }
+    }
+
+    private fun isTheSamePath(pattern: String, path: String): Boolean {
+        val patternSegments = pattern.split("/")
+        val pathSegments = path.split("/")
+
+        if (patternSegments.size != pathSegments.size) return false
+
+        return patternSegments.indices.all { i ->
+            patternSegments[i] == pathSegments[i] || patternSegments[i].startsWith("{")
+        }
+    }
+
+    /**
+     * Adds listener to send intercepted api responses through.
+     */
+    fun addListener(path: ApiPath, listener: ApiInterceptorListener) {
+        synchronized(apiResponseListenersMap) {
+            apiResponseListenersMap.getOrPut(path) { mutableListOf() }
+                    .add(listener)
+        }
+    }
+
+    /**
+     * Remove listener to send intercepted api responses through.
+     */
+    fun removeListener(path: ApiPath, listener: ApiInterceptorListener) {
+        synchronized(apiResponseListenersMap) {
+            apiResponseListenersMap[path]?.remove(listener)
+            if (apiResponseListenersMap[path]?.isEmpty() == true) {
+                apiResponseListenersMap.remove(path)
+            }
+        }
+    }
+}
diff --git a/tools/check/forbidden_strings_in_code.txt b/tools/check/forbidden_strings_in_code.txt
index 468fe717c0..7b7c44b9fd 100644
--- a/tools/check/forbidden_strings_in_code.txt
+++ b/tools/check/forbidden_strings_in_code.txt
@@ -161,7 +161,7 @@ Formatter\.formatShortFileSize===1
 # android\.text\.TextUtils
 
 ### This is not a rule, but a warning: the number of "enum class" has changed. For Json classes, it is mandatory that they have `@JsonClass(generateAdapter = false)`. If the enum is not used as a Json class, change the value in file forbidden_strings_in_code.txt
-enum class===92
+enum class===93
 
 ### Do not import temporary legacy classes
 import org.matrix.android.sdk.internal.legacy.riot===3