diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6493302ba7..9763bc1a82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 - BREAKING CHANGE: `package:http` min version bumped to 0.12.0 #104
 - BREAKING CHANGE: replace the `package:usage` by `package:uuid` #94
 - BREAKING CHANGE: `Event.message` must now be an instance of `Message`
+- BREAKING CHANGE: SentryClient must now be initialized with a SentryOptions #118
 - By default no logger it set #63
 - Added missing Contexts to Event.copyWith() #62 
 - remove the `package:args` dependency #94
diff --git a/dart/lib/src/browser_client.dart b/dart/lib/src/browser_client.dart
index 5ca60a0323..918b8f9d35 100644
--- a/dart/lib/src/browser_client.dart
+++ b/dart/lib/src/browser_client.dart
@@ -7,29 +7,15 @@ import 'dart:convert';
 import 'dart:html' show window;
 
 import 'package:http/browser_client.dart';
-import 'package:http/http.dart';
-import 'package:meta/meta.dart';
 
 import 'client.dart';
 import 'protocol.dart';
+import 'sentry_options.dart';
 import 'utils.dart';
 import 'version.dart';
 
-SentryClient createSentryClient({
-  @required String dsn,
-  Event environmentAttributes,
-  bool compressPayload,
-  Client httpClient,
-  dynamic clock,
-  UuidGenerator uuidGenerator,
-}) =>
-    SentryBrowserClient(
-      dsn: dsn,
-      environmentAttributes: environmentAttributes,
-      httpClient: httpClient,
-      clock: clock,
-      uuidGenerator: uuidGenerator,
-    );
+SentryClient createSentryClient(SentryOptions options) =>
+    SentryBrowserClient(options);
 
 /// Logs crash reports and events to the Sentry.io service.
 class SentryBrowserClient extends SentryClient {
@@ -53,49 +39,27 @@ class SentryBrowserClient extends SentryClient {
   /// If [uuidGenerator] is provided, it is used to generate the "event_id"
   /// field instead of the built-in random UUID v4 generator. This is useful in
   /// tests.
-  factory SentryBrowserClient({
-    @required String dsn,
-    Event environmentAttributes,
-    Client httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-    String origin,
-  }) {
-    httpClient ??= BrowserClient();
-    clock ??= getUtcDateTime;
-    uuidGenerator ??= generateUuidV4WithoutDashes;
+  factory SentryBrowserClient(SentryOptions options, {String origin}) {
+    options.httpClient ??= BrowserClient();
+    options.clock ??= getUtcDateTime;
+    options.uuidGenerator ??= generateUuidV4WithoutDashes;
 
     // origin is necessary for sentry to resolve stacktrace
     origin ??= '${window.location.origin}/';
 
     return SentryBrowserClient._(
-      httpClient: httpClient,
-      clock: clock,
-      uuidGenerator: uuidGenerator,
-      environmentAttributes: environmentAttributes,
-      dsn: dsn,
+      options,
       origin: origin,
       platform: browserPlatform,
     );
   }
 
-  SentryBrowserClient._({
-    Client httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-    Event environmentAttributes,
-    String dsn,
-    String platform,
-    String origin,
-  }) : super.base(
-          httpClient: httpClient,
-          clock: clock,
-          uuidGenerator: uuidGenerator,
-          environmentAttributes: environmentAttributes,
-          dsn: dsn,
-          platform: platform,
+  SentryBrowserClient._(SentryOptions options, {String origin, String platform})
+      : super.base(
+          options,
           origin: origin,
           sdk: Sdk(name: browserSdkName, version: sdkVersion),
+          platform: platform,
         );
 
   @override
diff --git a/dart/lib/src/client.dart b/dart/lib/src/client.dart
index 6f19a952ed..93061c6065 100644
--- a/dart/lib/src/client.dart
+++ b/dart/lib/src/client.dart
@@ -1,7 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
 
-import 'package:http/http.dart';
 import 'package:meta/meta.dart';
 import 'package:sentry/sentry.dart';
 
@@ -22,60 +21,30 @@ abstract class SentryClient {
   ///
   /// Creates an `SentryIOClient` if `dart:io` is available and a `SentryBrowserClient` if
   /// `dart:html` is available, otherwise it will throw an unsupported error.
-  factory SentryClient({
-    @required String dsn,
-    Event environmentAttributes,
-    bool compressPayload,
-    Client httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-  }) =>
-      createSentryClient(
-        dsn: dsn,
-        environmentAttributes: environmentAttributes,
-        httpClient: httpClient,
-        clock: clock,
-        uuidGenerator: uuidGenerator,
-        compressPayload: compressPayload,
-      );
-
-  SentryClient.base({
-    this.httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-    String dsn,
-    this.environmentAttributes,
+  factory SentryClient(SentryOptions options) => createSentryClient(options);
+
+  SentryClient.base(
+    this.options, {
     String platform,
     this.origin,
     Sdk sdk,
-  })  : _dsn = Dsn.parse(dsn),
-        _uuidGenerator = uuidGenerator ?? generateUuidV4WithoutDashes,
+  })  : _dsn = Dsn.parse(options.dsn),
         _platform = platform ?? sdkPlatform,
         sdk = sdk ?? Sdk(name: sdkName, version: sdkVersion) {
-    if (clock == null) {
-      _clock = getUtcDateTime;
+    if (options.clock == null) {
+      options.clock = getUtcDateTime;
     } else {
-      _clock = (clock is ClockProvider ? clock : clock.get) as ClockProvider;
+      options.clock = (options.clock is ClockProvider
+          ? options.clock
+          : options.clock.get) as ClockProvider;
     }
   }
 
-  @protected
-  final Client httpClient;
-
-  ClockProvider _clock;
-  final UuidGenerator _uuidGenerator;
-
-  /// Contains [Event] attributes that are automatically mixed into all events
-  /// captured through this client.
-  ///
-  /// This event is designed to contain static values that do not change from
-  /// event to event, such as local operating system version, the version of
-  /// Dart/Flutter SDK, etc. These attributes have lower precedence than those
-  /// supplied in the even passed to [capture].
-  final Event environmentAttributes;
-
   final Dsn _dsn;
 
+  @protected
+  SentryOptions options;
+
   /// The DSN URI.
   @visibleForTesting
   Uri get dsnUri => _dsn.uri;
@@ -108,7 +77,7 @@ abstract class SentryClient {
   User userContext;
 
   /// Use for browser stacktrace
-  final String origin;
+  String origin;
 
   /// Used by sentry to differentiate browser from io environment
   final String _platform;
@@ -142,7 +111,7 @@ abstract class SentryClient {
     StackFrameFilter stackFrameFilter,
     Scope scope,
   }) async {
-    final now = _clock();
+    final now = options.clock();
     var authHeader = 'Sentry sentry_version=6, sentry_client=$clientId, '
         'sentry_timestamp=${now.millisecondsSinceEpoch}, sentry_key=$publicKey';
     if (secretKey != null) {
@@ -153,12 +122,12 @@ abstract class SentryClient {
 
     final data = <String, dynamic>{
       'project': projectId,
-      'event_id': _uuidGenerator(),
+      'event_id': options.uuidGenerator(),
       'timestamp': formatDateAsIso8601WithSecondPrecision(now),
     };
 
-    if (environmentAttributes != null) {
-      mergeAttributes(environmentAttributes.toJson(), into: data);
+    if (options.environmentAttributes != null) {
+      mergeAttributes(options.environmentAttributes.toJson(), into: data);
     }
 
     // Merge the user context.
@@ -178,17 +147,13 @@ abstract class SentryClient {
 
     final body = bodyEncoder(data, headers);
 
-    final response = await httpClient.post(
+    final response = await options.httpClient.post(
       postUri,
       headers: headers,
       body: body,
     );
 
     if (response.statusCode != 200) {
-      /*var errorMessage = 'Sentry.io responded with HTTP ${response.statusCode}';
-      if (response.headers['x-sentry-error'] != null) {
-        errorMessage += ': ${response.headers['x-sentry-error']}';
-      }*/
       return SentryId.empty();
     }
 
@@ -222,7 +187,7 @@ abstract class SentryClient {
   }
 
   Future<void> close() async {
-    httpClient.close();
+    options.httpClient?.close();
   }
 
   @override
diff --git a/dart/lib/src/client_stub.dart b/dart/lib/src/client_stub.dart
index 882268db74..67fdfbda69 100644
--- a/dart/lib/src/client_stub.dart
+++ b/dart/lib/src/client_stub.dart
@@ -2,21 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:http/http.dart';
-import 'package:meta/meta.dart';
-
 import 'client.dart';
-import 'protocol.dart';
-import 'utils.dart';
+import 'sentry_options.dart';
 
 /// Implemented in `browser_client.dart` and `io_client.dart`.
-SentryClient createSentryClient({
-  @required String dsn,
-  Event environmentAttributes,
-  bool compressPayload,
-  Client httpClient,
-  dynamic clock,
-  UuidGenerator uuidGenerator,
-}) =>
+SentryClient createSentryClient(SentryOptions options) =>
     throw UnsupportedError(
         'Cannot create a client without dart:html or dart:io.');
diff --git a/dart/lib/src/hub.dart b/dart/lib/src/hub.dart
index 30df85fc68..feac240ae2 100644
--- a/dart/lib/src/hub.dart
+++ b/dart/lib/src/hub.dart
@@ -11,15 +11,8 @@ typedef ScopeCallback = void Function(Scope);
 
 /// SDK API contract which combines a client and scope management
 class Hub {
-  static SentryClient _getClient({SentryOptions fromOptions}) {
-    return SentryClient(
-      dsn: fromOptions.dsn,
-      environmentAttributes: fromOptions.environmentAttributes,
-      compressPayload: fromOptions.compressPayload,
-      httpClient: fromOptions.httpClient,
-      clock: fromOptions.clock,
-      uuidGenerator: fromOptions.uuidGenerator,
-    );
+  static SentryClient _getClient(SentryOptions options) {
+    return SentryClient(options);
   }
 
   final ListQueue<_StackItem> _stack = ListQueue();
@@ -36,7 +29,7 @@ class Hub {
   }
 
   Hub._(SentryOptions options) : _options = options {
-    _stack.add(_StackItem(_getClient(fromOptions: options), Scope(_options)));
+    _stack.add(_StackItem(_getClient(_options), Scope(_options)));
     _isEnabled = true;
   }
 
diff --git a/dart/lib/src/io_client.dart b/dart/lib/src/io_client.dart
index f45ecc57d2..b46f54839e 100644
--- a/dart/lib/src/io_client.dart
+++ b/dart/lib/src/io_client.dart
@@ -6,30 +6,13 @@
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:http/http.dart';
-import 'package:meta/meta.dart';
+import 'package:sentry/sentry.dart';
 
 import 'client.dart';
 import 'protocol.dart';
-import 'utils.dart';
-import 'version.dart';
 
-SentryClient createSentryClient({
-  @required String dsn,
-  Event environmentAttributes,
-  bool compressPayload,
-  Client httpClient,
-  dynamic clock,
-  UuidGenerator uuidGenerator,
-}) =>
-    SentryIOClient(
-      dsn: dsn,
-      environmentAttributes: environmentAttributes,
-      compressPayload: compressPayload,
-      httpClient: httpClient,
-      clock: clock,
-      uuidGenerator: uuidGenerator,
-    );
+SentryClient createSentryClient(SentryOptions options) =>
+    SentryIOClient(options);
 
 /// Logs crash reports and events to the Sentry.io service.
 class SentryIOClient extends SentryClient {
@@ -57,52 +40,9 @@ class SentryIOClient extends SentryClient {
   /// If [uuidGenerator] is provided, it is used to generate the "event_id"
   /// field instead of the built-in random UUID v4 generator. This is useful in
   /// tests.
-  factory SentryIOClient({
-    @required String dsn,
-    Event environmentAttributes,
-    bool compressPayload,
-    Client httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-  }) {
-    httpClient ??= Client();
-    clock ??= getUtcDateTime;
-    uuidGenerator ??= generateUuidV4WithoutDashes;
-    compressPayload ??= true;
+  factory SentryIOClient(SentryOptions options) => SentryIOClient._(options);
 
-    return SentryIOClient._(
-      httpClient: httpClient,
-      clock: clock,
-      uuidGenerator: uuidGenerator,
-      environmentAttributes: environmentAttributes,
-      dsn: dsn,
-      compressPayload: compressPayload,
-      platform: sdkPlatform,
-    );
-  }
-
-  SentryIOClient._({
-    Client httpClient,
-    dynamic clock,
-    UuidGenerator uuidGenerator,
-    Event environmentAttributes,
-    String dsn,
-    this.compressPayload = true,
-    String platform,
-    String origin,
-  }) : super.base(
-          httpClient: httpClient,
-          clock: clock,
-          uuidGenerator: uuidGenerator,
-          environmentAttributes: environmentAttributes,
-          dsn: dsn,
-          platform: platform,
-          origin: origin,
-          sdk: Sdk(name: sdkName, version: sdkVersion),
-        );
-
-  /// Whether to compress payloads sent to Sentry.io.
-  final bool compressPayload;
+  SentryIOClient._(SentryOptions options) : super.base(options);
 
   @override
   Map<String, String> buildHeaders(String authHeader) {
@@ -123,7 +63,7 @@ class SentryIOClient extends SentryClient {
     // [SentryIOClient] implement gzip compression
     // gzip compression is not available on browser
     var body = utf8.encode(json.encode(data));
-    if (compressPayload) {
+    if (options.compressPayload) {
       headers['Content-Encoding'] = 'gzip';
       body = gzip.encode(body);
     }
diff --git a/dart/lib/src/noop_client.dart b/dart/lib/src/noop_client.dart
index 3f7f4c9119..8f7f3a4fcc 100644
--- a/dart/lib/src/noop_client.dart
+++ b/dart/lib/src/noop_client.dart
@@ -1,10 +1,9 @@
 import 'dart:async';
 
-import 'package:http/src/client.dart';
-
 import 'client.dart';
 import 'protocol.dart';
 import 'scope.dart';
+import 'sentry_options.dart';
 
 class NoOpSentryClient implements SentryClient {
   NoOpSentryClient._();
@@ -18,6 +17,12 @@ class NoOpSentryClient implements SentryClient {
   @override
   User userContext;
 
+  @override
+  SentryOptions options;
+
+  @override
+  String origin;
+
   @override
   List<int> bodyEncoder(
     Map<String, dynamic> data,
@@ -57,15 +62,6 @@ class NoOpSentryClient implements SentryClient {
   @override
   Uri get dsnUri => null;
 
-  @override
-  Event get environmentAttributes => null;
-
-  @override
-  Client get httpClient => null;
-
-  @override
-  String get origin => null;
-
   @override
   String get postUri => null;
 
diff --git a/dart/test/sentry_browser_test.dart b/dart/test/sentry_browser_test.dart
index 0531f7ec6b..e4c4711ce4 100644
--- a/dart/test/sentry_browser_test.dart
+++ b/dart/test/sentry_browser_test.dart
@@ -11,7 +11,7 @@ import 'test_utils.dart';
 void main() {
   group('SentryBrowserClient', () {
     test('SentryClient constructor build browser client', () {
-      final client = SentryClient(dsn: testDsn);
+      final client = SentryClient(SentryOptions(dsn: testDsn));
       expect(client is SentryBrowserClient, isTrue);
     });
 
diff --git a/dart/test/sentry_io_test.dart b/dart/test/sentry_io_test.dart
index cc19693602..10a5b70e00 100644
--- a/dart/test/sentry_io_test.dart
+++ b/dart/test/sentry_io_test.dart
@@ -13,7 +13,7 @@ import 'test_utils.dart';
 void main() {
   group(SentryIOClient, () {
     test('SentryClient constructor build io client', () {
-      final client = SentryClient(dsn: testDsn);
+      final client = SentryClient(SentryOptions(dsn: testDsn));
       expect(client is SentryIOClient, isTrue);
     });
 
diff --git a/dart/test/test_utils.dart b/dart/test/test_utils.dart
index 5a34b86ee5..13107a7ded 100644
--- a/dart/test/test_utils.dart
+++ b/dart/test/test_utils.dart
@@ -70,15 +70,17 @@ Future testCaptureException(
   });
 
   final client = SentryClient(
-    dsn: testDsn,
-    httpClient: httpMock,
-    clock: fakeClockProvider,
-    uuidGenerator: () => 'X' * 32,
-    compressPayload: compressPayload,
-    environmentAttributes: const Event(
-      serverName: 'test.server.com',
-      release: '1.2.3',
-      environment: 'staging',
+    SentryOptions(
+      dsn: testDsn,
+      httpClient: httpMock,
+      clock: fakeClockProvider,
+      uuidGenerator: () => 'X' * 32,
+      compressPayload: compressPayload,
+      environmentAttributes: const Event(
+        serverName: 'test.server.com',
+        release: '1.2.3',
+        environment: 'staging',
+      ),
     ),
   );
 
@@ -176,7 +178,7 @@ Future testCaptureException(
 
 void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
   test('can parse DSN', () async {
-    final client = SentryClient(dsn: testDsn);
+    final client = SentryClient(SentryOptions(dsn: testDsn));
     expect(client.dsnUri, Uri.parse(testDsn));
     expect(client.postUri, 'https://sentry.example.com/api/1/store/');
     expect(client.publicKey, 'public');
@@ -186,7 +188,7 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
   });
 
   test('can parse DSN without secret', () async {
-    final client = SentryClient(dsn: _testDsnWithoutSecret);
+    final client = SentryClient(SentryOptions(dsn: _testDsnWithoutSecret));
     expect(client.dsnUri, Uri.parse(_testDsnWithoutSecret));
     expect(client.postUri, 'https://sentry.example.com/api/1/store/');
     expect(client.publicKey, 'public');
@@ -196,7 +198,7 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
   });
 
   test('can parse DSN with path', () async {
-    final client = SentryClient(dsn: _testDsnWithPath);
+    final client = SentryClient(SentryOptions(dsn: _testDsnWithPath));
     expect(client.dsnUri, Uri.parse(_testDsnWithPath));
     expect(client.postUri, 'https://sentry.example.com/path/api/1/store/');
     expect(client.publicKey, 'public');
@@ -205,7 +207,7 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
     await client.close();
   });
   test('can parse DSN with port', () async {
-    final client = SentryClient(dsn: _testDsnWithPort);
+    final client = SentryClient(SentryOptions(dsn: _testDsnWithPort));
     expect(client.dsnUri, Uri.parse(_testDsnWithPort));
     expect(client.postUri, 'https://sentry.example.com:8888/api/1/store/');
     expect(client.publicKey, 'public');
@@ -228,15 +230,17 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
     });
 
     final client = SentryClient(
-      dsn: _testDsnWithoutSecret,
-      httpClient: httpMock,
-      clock: fakeClockProvider,
-      compressPayload: false,
-      uuidGenerator: () => 'X' * 32,
-      environmentAttributes: const Event(
-        serverName: 'test.server.com',
-        release: '1.2.3',
-        environment: 'staging',
+      SentryOptions(
+        dsn: _testDsnWithoutSecret,
+        httpClient: httpMock,
+        clock: fakeClockProvider,
+        compressPayload: false,
+        uuidGenerator: () => 'X' * 32,
+        environmentAttributes: const Event(
+          serverName: 'test.server.com',
+          release: '1.2.3',
+          environment: 'staging',
+        ),
       ),
     );
 
@@ -284,15 +288,17 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
     });
 
     final client = SentryClient(
-      dsn: testDsn,
-      httpClient: httpMock,
-      clock: fakeClockProvider,
-      uuidGenerator: () => 'X' * 32,
-      compressPayload: false,
-      environmentAttributes: const Event(
-        serverName: 'test.server.com',
-        release: '1.2.3',
-        environment: 'staging',
+      SentryOptions(
+        dsn: testDsn,
+        httpClient: httpMock,
+        clock: fakeClockProvider,
+        uuidGenerator: () => 'X' * 32,
+        compressPayload: false,
+        environmentAttributes: const Event(
+          serverName: 'test.server.com',
+          release: '1.2.3',
+          environment: 'staging',
+        ),
       ),
     );
 
@@ -338,15 +344,17 @@ void runTest({Codec<List<int>, List<int>> gzip, bool isWeb = false}) {
         extras: <String, String>{'foo': 'bar'});
 
     final client = SentryClient(
-      dsn: testDsn,
-      httpClient: httpMock,
-      clock: fakeClockProvider,
-      uuidGenerator: () => 'X' * 32,
-      compressPayload: false,
-      environmentAttributes: const Event(
-        serverName: 'test.server.com',
-        release: '1.2.3',
-        environment: 'staging',
+      SentryOptions(
+        dsn: testDsn,
+        httpClient: httpMock,
+        clock: fakeClockProvider,
+        uuidGenerator: () => 'X' * 32,
+        compressPayload: false,
+        environmentAttributes: const Event(
+          serverName: 'test.server.com',
+          release: '1.2.3',
+          environment: 'staging',
+        ),
       ),
     );
     client.userContext = clientUserContext;
diff --git a/flutter/example/lib/main.dart b/flutter/example/lib/main.dart
index 4154ccccfe..94b288ce09 100644
--- a/flutter/example/lib/main.dart
+++ b/flutter/example/lib/main.dart
@@ -11,10 +11,11 @@ import 'package:universal_platform/universal_platform.dart';
 const String _release =
     String.fromEnvironment('SENTRY_RELEASE', defaultValue: 'unknown');
 
+const String exampleDsn =
+    'https://cb0fad6f5d4e42ebb9c956cb0463edc9@o447951.ingest.sentry.io/5428562';
+
 // NOTE: Add your DSN below to get the events in your Sentry project.
-final SentryClient _sentry = SentryClient(
-    dsn:
-        'https://cb0fad6f5d4e42ebb9c956cb0463edc9@o447951.ingest.sentry.io/5428562');
+final SentryClient _sentry = SentryClient(SentryOptions(dsn: exampleDsn));
 
 // Proposed init:
 // https://github.com/bruno-garcia/badges.bar/blob/2450ed9125f7b73d2baad1fa6d676cc71858116c/lib/src/sentry.dart#L9-L32