diff --git a/packages/superset-ui-demo/package.json b/packages/superset-ui-demo/package.json
index 9a064bb8f..72eb975c8 100644
--- a/packages/superset-ui-demo/package.json
+++ b/packages/superset-ui-demo/package.json
@@ -30,10 +30,12 @@
   "homepage": "https://github.com/apache-superset/superset-ui#readme",
   "dependencies": {
     "@babel/core": "^7.1.2",
+    "@babel/polyfill": "^7.2.5",
     "@storybook/addon-knobs": "^4.0.2",
     "@storybook/addon-options": "^4.0.3",
     "@storybook/react": "^4.0.2",
     "@superset-ui/color": "^0.10.1",
+    "@superset-ui/connection": "^0.10.2",
     "@superset-ui/number-format": "^0.10.1",
     "@superset-ui/time-format": "^0.10.1",
     "babel-loader": "^8.0.4",
diff --git a/packages/superset-ui-demo/storybook-config/webpack.config.js b/packages/superset-ui-demo/storybook-config/webpack.config.js
new file mode 100644
index 000000000..187361534
--- /dev/null
+++ b/packages/superset-ui-demo/storybook-config/webpack.config.js
@@ -0,0 +1,19 @@
+module.exports = (baseConfig, env, config) => {
+  const customConfig = config;
+
+  customConfig.module.rules.push({
+    loader: require.resolve('babel-loader'),
+    options: {
+      presets: [
+        ['@babel/preset-env', { useBuiltIns: 'entry' }],
+        '@babel/preset-react',
+        '@babel/preset-typescript',
+      ],
+    },
+    test: /\.tsx?$/,
+  });
+
+  customConfig.resolve.extensions.push('.ts', '.tsx');
+
+  return customConfig;
+};
diff --git a/packages/superset-ui-demo/storybook/shared/components/ErrorMessage.tsx b/packages/superset-ui-demo/storybook/shared/components/ErrorMessage.tsx
new file mode 100644
index 000000000..78b38d7fa
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/shared/components/ErrorMessage.tsx
@@ -0,0 +1,16 @@
+import React from 'react';
+
+export type Props = {
+  error: Error;
+};
+
+export default function ErrorMessage({ error }: Props) {
+  return (
+    <div className="alert alert-danger">
+      {error.stack || error.message}
+      {!error.message &&
+        !error.stack &&
+        (typeof error === 'object' ? JSON.stringify(error) : String(error))}
+    </div>
+  );
+}
diff --git a/packages/superset-ui-demo/storybook/shared/components/Expandable.tsx b/packages/superset-ui-demo/storybook/shared/components/Expandable.tsx
new file mode 100644
index 000000000..dde54dc6c
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/shared/components/Expandable.tsx
@@ -0,0 +1,42 @@
+import React, { ReactNode } from 'react';
+
+export type Props = {
+  children: ReactNode;
+  expandableWhat?: string;
+};
+
+type State = {
+  open: boolean;
+};
+
+export default class Expandable extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+    this.state = { open: false };
+    this.handleToggle = this.handleToggle.bind(this);
+  }
+
+  handleToggle() {
+    this.setState(({ open }) => ({ open: !open }));
+  }
+
+  render() {
+    const { open } = this.state;
+    const { children, expandableWhat } = this.props;
+
+    return (
+      <div>
+        <button
+          type="button"
+          onClick={this.handleToggle}
+          className="btn btn-outline-primary btn-sm"
+        >
+          {`${open ? 'Hide' : 'Show'} ${expandableWhat}`}
+        </button>
+        <br />
+        <br />
+        {open ? children : null}
+      </div>
+    );
+  }
+}
diff --git a/packages/superset-ui-demo/storybook/shared/components/VerifyCORS.tsx b/packages/superset-ui-demo/storybook/shared/components/VerifyCORS.tsx
new file mode 100644
index 000000000..f4cbf2cb8
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/shared/components/VerifyCORS.tsx
@@ -0,0 +1,116 @@
+import React, { ReactNode } from 'react';
+import { SupersetClient } from '@superset-ui/connection';
+import ErrorMessage from './ErrorMessage';
+
+export type Props = {
+  children: ({ payload }: { payload: object }) => ReactNode;
+  endpoint?: string;
+  host: string;
+  method?: 'POST' | 'GET';
+  postPayload?: string;
+};
+
+type State = {
+  didVerify: boolean;
+  error?: Error;
+  payload?: object;
+};
+
+export const renderError = error => (
+  <div>
+    The following error occurred, make sure you have <br />
+    1) configured CORS in Superset to receive requests from this domain. <br />
+    2) set the Superset host correctly below. <br />
+    3) debug the CORS configuration under the `@superset-ui/connection` stories.
+    <br />
+    <br />
+    <ErrorMessage error={error} />
+  </div>
+);
+
+export default class VerifyCORS extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+    this.state = { didVerify: false };
+    this.handleVerify = this.handleVerify.bind(this);
+  }
+
+  componentDidUpdate(prevProps) {
+    const { endpoint, host, postPayload, method } = this.props;
+    if (
+      (this.state.didVerify || this.state.error) &&
+      (prevProps.endpoint !== endpoint ||
+        prevProps.host !== host ||
+        prevProps.postPayload !== postPayload ||
+        prevProps.method !== method)
+    ) {
+      // eslint-disable-next-line react/no-did-update-set-state
+      this.setState({ didVerify: false, error: undefined });
+    }
+  }
+
+  handleVerify() {
+    const { endpoint, host, postPayload, method } = this.props;
+
+    SupersetClient.reset();
+
+    SupersetClient.configure({
+      credentials: 'include',
+      host,
+      mode: 'cors',
+    })
+      .init()
+      .then(() =>
+        // Test an endpoint if specified
+        endpoint
+          ? SupersetClient.request({
+              endpoint,
+              method,
+              postPayload: postPayload ? JSON.parse(postPayload) : '',
+            })
+          : Promise.resolve({}),
+      )
+      .then(response => this.setState({ didVerify: true, error: undefined, payload: response }))
+      .catch((error: Response) => {
+        const { status, statusText = error } = error;
+        this.setState({ error: Error(`${status || ''}${status ? ':' : ''} ${statusText}`) });
+      });
+  }
+
+  render() {
+    const { didVerify, error, payload } = this.state;
+    const { children } = this.props;
+
+    return didVerify ? (
+      children({ payload })
+    ) : (
+      <div className="row">
+        <div className="col-md-10">
+          This example requires CORS requests from this domain. <br />
+          <br />
+          1) enable CORS requests in your Superset App from {`${window.location.origin}`}
+          <br />
+          2) configure your Superset App host name below <br />
+          3) click below to verify authentication. You may debug CORS further using the
+          `@superset-ui/connection` story. <br />
+          <br />
+          <button
+            type="button"
+            onClick={this.handleVerify}
+            className="btn btn-outline-primary btn-sm"
+          >
+            Verify
+          </button>
+          <br />
+          <br />
+        </div>
+
+        {error && (
+          <div className="col-md-8">
+            <ErrorMessage error={error} />
+          </div>
+        )}
+      </div>
+    );
+  }
+}
diff --git a/packages/superset-ui-demo/storybook/stories/index.js b/packages/superset-ui-demo/storybook/stories/index.js
index 37ce71217..25480a59d 100644
--- a/packages/superset-ui-demo/storybook/stories/index.js
+++ b/packages/superset-ui-demo/storybook/stories/index.js
@@ -1,3 +1,4 @@
+import '@babel/polyfill';
 import { setAddon, storiesOf } from '@storybook/react';
 import { withKnobs } from '@storybook/addon-knobs';
 import JSXAddon from 'storybook-addon-jsx';
@@ -36,7 +37,7 @@ requireContext.keys().forEach(packageName => {
 
       storiesOf(storyPath, module)
         .addParameters({ options })
-        .addDecorator(withKnobs)
+        .addDecorator(withKnobs({ escapeHTML: false }))
         .addWithJSX(storyName, renderStory);
     });
   }
diff --git a/packages/superset-ui-demo/storybook/stories/mocks/formData.js b/packages/superset-ui-demo/storybook/stories/mocks/formData.js
new file mode 100644
index 000000000..59070cdf7
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/stories/mocks/formData.js
@@ -0,0 +1,35 @@
+/* eslint sort-keys: 'off' */
+/** The form data defined here is based on default visualizations packaged with Apache Superset */
+
+export const bigNumberFormData = {
+  datasource: '3__table',
+  viz_type: 'big_number',
+  slice_id: 54,
+  granularity_sqla: 'ds',
+  time_grain_sqla: 'P1D',
+  time_range: '100 years ago : now',
+  metric: 'sum__num',
+  adhoc_filters: [],
+  compare_lag: '5',
+  compare_suffix: 'over 5Y',
+  y_axis_format: '.3s',
+  show_trend_line: true,
+  start_y_axis_at_zero: true,
+};
+
+export const wordCloudFormData = {
+  datasource: '3__table',
+  viz_type: 'word_cloud',
+  slice_id: 60,
+  url_params: {},
+  granularity_sqla: 'ds',
+  time_grain_sqla: 'P1D',
+  time_range: '100 years ago : now',
+  series: 'name',
+  metric: 'sum__num',
+  adhoc_filters: [],
+  row_limit: 50,
+  size_from: 10,
+  size_to: 70,
+  rotation: 'square',
+};
diff --git a/packages/superset-ui-demo/storybook/stories/superset-ui-connection/ConnectionStories.jsx b/packages/superset-ui-demo/storybook/stories/superset-ui-connection/ConnectionStories.jsx
new file mode 100644
index 000000000..cb3e9eea6
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/stories/superset-ui-connection/ConnectionStories.jsx
@@ -0,0 +1,46 @@
+import React from 'react';
+import { select, text } from '@storybook/addon-knobs';
+
+import VerifyCORS from '../../shared/components/VerifyCORS';
+import Expandable from '../../shared/components/Expandable';
+import { bigNumberFormData } from '../mocks/formData';
+
+const REQUEST_METHODS = ['GET', 'POST'];
+
+export default [
+  {
+    renderStory: () => {
+      const host = text('Superset App host for CORS request', 'localhost:9000');
+      const endpoint = text('Endpoint to test (blank to test auth only)', undefined);
+      const method = endpoint ? select('Request method', REQUEST_METHODS, 'POST') : undefined;
+      const postPayload =
+        endpoint && method === 'POST'
+          ? text('Optional POST payload', JSON.stringify({ form_data: bigNumberFormData }))
+          : undefined;
+
+      return (
+        <div style={{ margin: 16 }}>
+          <VerifyCORS
+            host={host}
+            endpoint={endpoint}
+            method={method}
+            postPayload={`${postPayload}`}
+          >
+            {({ payload }) => (
+              <>
+                <div className="alert alert-success">Success! Update knobs below to try again</div>
+                <br />
+                <Expandable expandableWhat="payload">
+                  <br />
+                  <pre style={{ fontSize: 11 }}>{JSON.stringify(payload, null, 2)}</pre>
+                </Expandable>
+              </>
+            )}
+          </VerifyCORS>
+        </div>
+      );
+    },
+    storyName: 'Configure CORS',
+    storyPath: '@superset-ui/connection',
+  },
+];
diff --git a/packages/superset-ui-demo/storybook/stories/superset-ui-connection/index.js b/packages/superset-ui-demo/storybook/stories/superset-ui-connection/index.js
new file mode 100644
index 000000000..ad530c0e3
--- /dev/null
+++ b/packages/superset-ui-demo/storybook/stories/superset-ui-connection/index.js
@@ -0,0 +1,5 @@
+import ConnectionStories from './ConnectionStories';
+
+export default {
+  examples: [...ConnectionStories],
+};