diff --git a/lerna.json b/lerna.json
index 6dbcd5fbae..471bd15671 100644
--- a/lerna.json
+++ b/lerna.json
@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.28.35"
+  "version": "0.29.0"
 }
diff --git a/package.json b/package.json
index 413a970322..33c90104df 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,6 @@
   },
   "devDependencies": {
     "@polkadot/dev": "^0.20.19",
-    "@polkadot/ts": "^0.1.27"
+    "@polkadot/ts": "^0.1.28"
   }
 }
diff --git a/packages/api-format/package.json b/packages/api-format/package.json
index 4145514164..4eb84a230c 100644
--- a/packages/api-format/package.json
+++ b/packages/api-format/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-format",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Input/Output formatters for JsonRPC exchange",
   "main": "index.js",
   "keywords": [
@@ -30,8 +30,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-format#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/jsonrpc": "^0.28.35",
-    "@polkadot/primitives": "^0.28.35",
+    "@polkadot/jsonrpc": "^0.29.0",
+    "@polkadot/primitives": "^0.29.0",
     "@polkadot/util": "^0.30.3",
     "@polkadot/util-keyring": "^0.30.3"
   }
diff --git a/packages/api-provider/package.json b/packages/api-provider/package.json
index 9100db9464..8f81f92717 100644
--- a/packages/api-provider/package.json
+++ b/packages/api-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-provider",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Transport providers for the API",
   "main": "index.js",
   "keywords": [
@@ -34,7 +34,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/storage": "^0.28.35",
+    "@polkadot/storage": "^0.29.0",
     "@polkadot/util": "^0.30.3",
     "@polkadot/util-crypto": "^0.30.3",
     "@polkadot/util-keyring": "^0.30.3",
diff --git a/packages/api-provider/test/e2e.test.js b/packages/api-provider/test/e2e.test.js
index 1f056587db..837f8b0721 100644
--- a/packages/api-provider/test/e2e.test.js
+++ b/packages/api-provider/test/e2e.test.js
@@ -4,7 +4,7 @@
 
 import storage from '@polkadot/storage';
 
-import createApi from '../../api/src';
+import Api from '../../api/src';
 import Ws from '../src/ws';
 
 describe.skip('e2e', () => {
@@ -12,7 +12,7 @@ describe.skip('e2e', () => {
 
   beforeEach(() => {
     jest.setTimeout(30000);
-    api = createApi(new Ws('ws://127.0.0.1:9944'));
+    api = new Api(new Ws('ws://127.0.0.1:9944'));
   });
 
   it('subscribes to chain_newHead', (done) => {
diff --git a/packages/api-rx/package.json b/packages/api-rx/package.json
index d485bddcf6..ace865d652 100644
--- a/packages/api-rx/package.json
+++ b/packages/api-rx/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-rx",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "An RxJs wrapper around the Polkadot JS API",
   "main": "index.js",
   "keywords": [
@@ -30,8 +30,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-rx#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/api": "^0.28.35",
-    "@polkadot/api-provider": "^0.28.35",
+    "@polkadot/api": "^0.29.0",
+    "@polkadot/api-provider": "^0.29.0",
     "@types/rx": "^4.1.1",
     "rxjs": "^6.3.2"
   }
diff --git a/packages/api-rx/src/api/connected.ts b/packages/api-rx/src/api/connected.ts
deleted file mode 100644
index 78300ee174..0000000000
--- a/packages/api-rx/src/api/connected.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2017-2018 @polkadot/api-rx authors & contributors
-// This software may be modified and distributed under the terms
-// of the ISC license. See the LICENSE file for details.
-
-import { ProviderInterface } from '@polkadot/api-provider/types';
-
-import { BehaviorSubject } from 'rxjs';
-
-export default function connected (provider: ProviderInterface): BehaviorSubject<boolean> {
-  const subject = new BehaviorSubject(provider.isConnected());
-
-  provider.on('connected', () => subject.next(true));
-  provider.on('disconnected', () => subject.next(false));
-
-  return subject;
-}
diff --git a/packages/api-rx/src/api/index.ts b/packages/api-rx/src/api/index.ts
deleted file mode 100644
index 2f86fb944c..0000000000
--- a/packages/api-rx/src/api/index.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2017-2018 @polkadot/api-rx authors & contributors
-// This software may be modified and distributed under the terms
-// of the ISC license. See the LICENSE file for details.
-
-import { ProviderInterface } from '@polkadot/api-provider/types';
-import { RxApiInterface } from '../types';
-
-import { BehaviorSubject } from 'rxjs';
-
-import createConnected from './connected';
-
-export default function exposed (provider: ProviderInterface): RxApiInterface {
-  const connected = createConnected(provider);
-
-  // @ts-ignore as in types.d.ts, not sure what to do here
-  return {
-    isConnected: (): BehaviorSubject<boolean> =>
-      connected
-  };
-}
diff --git a/packages/api-rx/src/index.spec.js b/packages/api-rx/src/index.spec.js
index 3ed1e8009b..41ff5a82c1 100644
--- a/packages/api-rx/src/index.spec.js
+++ b/packages/api-rx/src/index.spec.js
@@ -2,6 +2,8 @@
 // This software may be modified and distributed under the terms
 // of the ISC license. See the LICENSE file for details.
 
+import isFunction from '@polkadot/util/is/function';
+
 jest.mock('@polkadot/api-provider/ws', () => class {
   isConnected = () => true;
   on = () => true;
@@ -9,14 +11,30 @@ jest.mock('@polkadot/api-provider/ws', () => class {
 });
 jest.mock('./interface', () => (api, sectionName) => sectionName);
 
-const createApi = require('./index').default;
+const Api = require('./index').default;
+
+describe('Api', () => {
+  let api;
+
+  beforeEach(() => {
+    api = new Api();
+  });
 
-describe('createApi', () => {
   it('creates an instance with all sections', () => {
     expect(
-      Object.keys(createApi())
+      Object
+        .keys(api)
+        .filter((key) =>
+          !key.startsWith('_')
+        )
     ).toEqual([
-      'isConnected', 'author', 'chain', 'state', 'system'
+      'author', 'chain', 'state', 'system'
     ]);
   });
+
+  it('has isConnected', () => {
+    expect(
+      isFunction(api.isConnected)
+    ).toBe(true);
+  });
 });
diff --git a/packages/api-rx/src/index.ts b/packages/api-rx/src/index.ts
index 505162e93f..1465fa39bc 100644
--- a/packages/api-rx/src/index.ts
+++ b/packages/api-rx/src/index.ts
@@ -2,24 +2,39 @@
 // This software may be modified and distributed under the terms
 // of the ISC license. See the LICENSE file for details.
 
-import { Interface$Sections } from '@polkadot/jsonrpc/types';
+import { ApiInterface } from '@polkadot/api/types';
 import { ProviderInterface } from '@polkadot/api-provider/types';
-import { RxApiInterface } from './types';
+import { RxApiInterface, RxApiInterface$Section } from './types';
 
-import createApi from '@polkadot/api/index';
-import interfaces from '@polkadot/jsonrpc/index';
+import { BehaviorSubject } from 'rxjs';
+import Api from '@polkadot/api/index';
 import Ws from '@polkadot/api-provider/ws';
 
-import createExposed from './api';
 import defaults from './defaults';
 import createInterface from './interface';
 
-export default function rxApi (provider: ProviderInterface = new Ws(defaults.WS_URL)): RxApiInterface {
-  const api = createApi(provider);
+export default class RxApi implements RxApiInterface {
+  private _api: ApiInterface;
+  private _isConnected: BehaviorSubject<boolean>;
+  readonly author: RxApiInterface$Section;
+  readonly chain: RxApiInterface$Section;
+  readonly state: RxApiInterface$Section;
+  readonly system: RxApiInterface$Section;
 
-  return Object.keys(interfaces).reduce((result, type) => {
-    result[type as Interface$Sections] = createInterface(api, type as Interface$Sections);
+  constructor (provider: ProviderInterface = new Ws(defaults.WS_URL)) {
+    this._api = new Api(provider);
+    this._isConnected = new BehaviorSubject(provider.isConnected());
 
-    return result;
-  }, createExposed(provider));
+    provider.on('connected', () => this._isConnected.next(true));
+    provider.on('disconnected', () => this._isConnected.next(false));
+
+    this.author = createInterface(this._api, 'author');
+    this.chain = createInterface(this._api, 'chain');
+    this.state = createInterface(this._api, 'state');
+    this.system = createInterface(this._api, 'system');
+  }
+
+  isConnected (): BehaviorSubject<boolean> {
+    return this._isConnected;
+  }
 }
diff --git a/packages/api-rx/src/types.d.ts b/packages/api-rx/src/types.d.ts
index 3054f22e71..fbf5bf1868 100644
--- a/packages/api-rx/src/types.d.ts
+++ b/packages/api-rx/src/types.d.ts
@@ -13,7 +13,7 @@ export type RxApiInterface$Section = {
 };
 
 type RxApiInterface$Keys = {
-  [key in keyof Interfaces]: RxApiInterface$Section;
+  readonly [key in keyof Interfaces]: RxApiInterface$Section;
 };
 
 export type RxApiInterface = RxApiInterface$Keys & {
diff --git a/packages/api/README.md b/packages/api/README.md
index df2f8188f1..5d0d2da84d 100644
--- a/packages/api/README.md
+++ b/packages/api/README.md
@@ -25,11 +25,11 @@ npm install --save @polkadot/api
 Initialisation -
 
 ```js
-import createApi from '@polkadot/api';
+import Api from '@polkadot/api';
 import WsProvider from '@polkadot/api-provider/ws';
 
 const provider = new WsProvider('http://127.0.0.1:9944');
-const api = createApi(provider);
+const api = new Api(provider);
 ```
 
 Making calls -
diff --git a/packages/api/package.json b/packages/api/package.json
index 8bdfab2713..05124f85dc 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -30,10 +30,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/api-format": "^0.28.35",
-    "@polkadot/api-provider": "^0.28.35",
-    "@polkadot/jsonrpc": "^0.28.35",
-    "@polkadot/params": "^0.28.35",
+    "@polkadot/api-format": "^0.29.0",
+    "@polkadot/api-provider": "^0.29.0",
+    "@polkadot/jsonrpc": "^0.29.0",
+    "@polkadot/params": "^0.29.0",
     "@polkadot/util": "^0.30.3"
   }
 }
diff --git a/packages/api/src/create/formatResult.spec.js b/packages/api/src/create/formatResult.spec.js
index b5f3525026..61a0932613 100644
--- a/packages/api/src/create/formatResult.spec.js
+++ b/packages/api/src/create/formatResult.spec.js
@@ -4,7 +4,7 @@
 
 import storage from '@polkadot/storage';
 
-import createApi from '../index';
+import Api from '../index';
 
 const ADDR_ONE = '5EhmTa7fL6SdjgKXo9g6hetR6nHnRAmrtisoGFWEESjzECtY';
 const ADDR_TWO = '5FjbQAHSptRU4Q7Py6zDsRnE7UkpZikJVg5nm1tmu3WuZXKd';
@@ -31,7 +31,7 @@ describe('formatResult', () => {
         })
       )
     };
-    api = createApi(provider);
+    api = new Api(provider);
   });
 
   it('encodes key (with params), decoding response', () => {
diff --git a/packages/api/src/index.spec.js b/packages/api/src/index.spec.js
index dc3cc6051c..8f489ba343 100644
--- a/packages/api/src/index.spec.js
+++ b/packages/api/src/index.spec.js
@@ -2,7 +2,7 @@
 // This software may be modified and distributed under the terms
 // of the ISC license. See the LICENSE file for details.
 
-import createApi from './index';
+import Api from './index';
 
 describe('Api', () => {
   let api;
@@ -16,7 +16,7 @@ describe('Api', () => {
       }
     };
     sendSpy = jest.spyOn(provider, 'send');
-    api = createApi(provider);
+    api = new Api(provider);
   });
 
   afterEach(() => {
@@ -25,7 +25,7 @@ describe('Api', () => {
 
   it('requires a provider with a send method', () => {
     expect(
-      () => createApi({})
+      () => new Api({})
     ).toThrow(/Expected Provider/);
   });
 
diff --git a/packages/api/src/index.ts b/packages/api/src/index.ts
index 71f7fae276..5e5766d6b0 100644
--- a/packages/api/src/index.ts
+++ b/packages/api/src/index.ts
@@ -2,22 +2,29 @@
 // This software may be modified and distributed under the terms
 // of the ISC license. See the LICENSE file for details.
 
-import { Interface$Sections } from '@polkadot/jsonrpc/types';
 import { ProviderInterface } from '@polkadot/api-provider/types';
-import { ApiInterface } from './types';
+import { ApiInterface, ApiInterface$Section } from './types';
 
-import interfaces from '@polkadot/jsonrpc/index';
 import assert from '@polkadot/util/assert';
 import isFunction from '@polkadot/util/is/function';
 
 import createInterface from './create/interface';
 
-export default function api (provider: ProviderInterface): ApiInterface {
-  assert(provider && isFunction(provider.send), 'Expected Provider to API create');
+export default class Api implements ApiInterface {
+  private _provider: ProviderInterface;
+  readonly author: ApiInterface$Section;
+  readonly chain: ApiInterface$Section;
+  readonly state: ApiInterface$Section;
+  readonly system: ApiInterface$Section;
 
-  return Object.keys(interfaces).reduce((exposed, type) => {
-    exposed[type as Interface$Sections] = createInterface(provider, type as Interface$Sections);
+  constructor (provider: ProviderInterface) {
+    assert(provider && isFunction(provider.send), 'Expected Provider to API create');
 
-    return exposed;
-  }, {} as ApiInterface);
+    this._provider = provider;
+
+    this.author = createInterface(this._provider, 'author');
+    this.chain = createInterface(this._provider, 'chain');
+    this.state = createInterface(this._provider, 'state');
+    this.system = createInterface(this._provider, 'system');
+  }
 }
diff --git a/packages/api/src/types.d.ts b/packages/api/src/types.d.ts
index 8af3207303..7318fcdce1 100644
--- a/packages/api/src/types.d.ts
+++ b/packages/api/src/types.d.ts
@@ -16,5 +16,5 @@ export type ApiInterface$Section = {
 };
 
 export type ApiInterface = {
-  [key in keyof Interfaces]: ApiInterface$Section
+  readonly [key in keyof Interfaces]: ApiInterface$Section
 }
diff --git a/packages/type-extrinsics/package.json b/packages/type-extrinsics/package.json
index 66b0b91b93..bd0dcb97dc 100644
--- a/packages/type-extrinsics/package.json
+++ b/packages/type-extrinsics/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/extrinsics",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "main": "index.js",
   "repository": "https://github.com/polkadot-js/api.git",
   "author": "Jaco Greeff <jacogr@gmail.com>",
@@ -11,8 +11,8 @@
   "license": "ISC",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/params": "^0.28.35",
-    "@polkadot/primitives": "^0.28.35",
+    "@polkadot/params": "^0.29.0",
+    "@polkadot/primitives": "^0.29.0",
     "@polkadot/util": "^0.30.3"
   }
 }
diff --git a/packages/type-jsonrpc/package.json b/packages/type-jsonrpc/package.json
index 5d54715451..6752f6c1b5 100644
--- a/packages/type-jsonrpc/package.json
+++ b/packages/type-jsonrpc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/jsonrpc",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Method definitions for the Polkadot RPC layer",
   "main": "index.js",
   "engines": {
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-jsonrpc#readme",
   "dependencies": {
-    "@polkadot/params": "^0.28.35",
+    "@polkadot/params": "^0.29.0",
     "babel-runtime": "^6.26.0"
   }
 }
diff --git a/packages/type-params/package.json b/packages/type-params/package.json
index 2f187c04e8..a97048dcc3 100644
--- a/packages/type-params/package.json
+++ b/packages/type-params/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/params",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Type defintions for parameters as passed in calls",
   "main": "index.js",
   "engines": {
@@ -29,9 +29,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-params#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/extrinsics": "^0.28.35",
-    "@polkadot/params": "^0.28.35",
-    "@polkadot/primitives": "^0.28.35",
+    "@polkadot/extrinsics": "^0.29.0",
+    "@polkadot/params": "^0.29.0",
+    "@polkadot/primitives": "^0.29.0",
     "@polkadot/util": "^0.30.3",
     "@polkadot/util-keyring": "^0.30.3"
   }
diff --git a/packages/type-primitives/package.json b/packages/type-primitives/package.json
index db6e4abdc7..9628123e3a 100644
--- a/packages/type-primitives/package.json
+++ b/packages/type-primitives/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/primitives",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Type defintions for the Polkadot network",
   "main": "index.js",
   "engines": {
diff --git a/packages/type-storage/package.json b/packages/type-storage/package.json
index 4592b8c46d..590e044f95 100644
--- a/packages/type-storage/package.json
+++ b/packages/type-storage/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/storage",
-  "version": "0.28.35",
+  "version": "0.29.0",
   "description": "Generic wrapper wrapper around state storage",
   "main": "index.js",
   "engines": {
@@ -30,8 +30,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-storage#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "@polkadot/params": "^0.28.35",
-    "@polkadot/primitives": "^0.28.35",
+    "@polkadot/params": "^0.29.0",
+    "@polkadot/primitives": "^0.29.0",
     "@polkadot/util": "^0.30.3",
     "@polkadot/util-crypto": "^0.30.3",
     "@polkadot/util-keyring": "^0.30.3"
diff --git a/yarn.lock b/yarn.lock
index b407254ab4..06e260f180 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1225,9 +1225,9 @@
     "@polkadot/util-crypto" "^0.30.3"
     "@polkadot/util-rlp" "^0.30.3"
 
-"@polkadot/ts@^0.1.27":
-  version "0.1.27"
-  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.1.27.tgz#88ddd9e90f4c5c98996ecd433670839eaf530d73"
+"@polkadot/ts@^0.1.28":
+  version "0.1.28"
+  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.1.28.tgz#c3f2f4ae3864447a2938765d8fae953ed71aaa5e"
 
 "@polkadot/util-crypto@^0.30.3":
   version "0.30.3"