Quickstart

Prerequisites

A Nexus account - we are currently in closed beta. Request access at nexus.westyx.dev
A project and at least one service created in the console
An API key for that service (wxs_... for backend services, wxp_... for frontend)

Backend services use secret keys (backend services only) and can access secrets, configs, and flags. Frontend services use public keys (browser/frontend, safe to expose) and can access configs and flags only - secrets are never sent to the browser.

The examples below use Node.js, Python, and React. Full reference for all 8 SDKs is in the SDK docs.

0. Verify connectivity (optional)

Before installing an SDK, confirm your endpoint and API key work with a plain curl:

curl -s \
  -H "X-Nexus-API-Key: wxs_..." \
  https://your-service.westyx.dev/v1/sync

A valid response returns a JSON snapshot of your configs, secrets, and flags. An HTTP 401 means the key is wrong; an HTTP 404 means the slug in the URL is wrong. You can also tail the live SSE stream:

curl -N \
  -H "X-Nexus-API-Key: wxs_..." \
  -H "Accept: text/event-stream" \
  https://your-service.westyx.dev/v1/stream

You should see event:resync arrive within a second. Press Ctrl+C to stop.

The Host header is set automatically by curl to match the URL - no override needed.

1. Install the SDK

npm install @westyx-nexus/sdk-nodejs

pip install westyx-nexus-sdk

npm install @westyx-nexus/sdk-react

2. Initialize the client

Your service endpoint is shown in the Nexus console on the service detail page.

import { NexusClient } from '@westyx-nexus/sdk-nodejs';

const client = await NexusClient.create({
  endpoint: 'https://your-service.nexus.westyx.dev',
  apiKey:   'wxs_...',
});

from westyx_nexus import NexusClient, NexusConfig

client = NexusClient.create(NexusConfig(
    base_url='https://your-service.nexus.westyx.dev',
    api_key='wxs_...',
))

import { NexusProvider } from '@westyx-nexus/sdk-react';

export function App() {
  return (
    <NexusProvider config={{
      baseUrl: 'https://your-service.nexus.westyx.dev',
      apiKey:  'wxp_...',
    }}>
      <YourApp />
    </NexusProvider>
  );
}

3. Read values

const dbURL     = client.getConfig('database.url');
const stripeKey = client.getSecret('stripe.key');
const newUI     = client.getFlag('new-ui', false);

db_url     = client.get_config('database.url')
stripe_key = client.get_secret('stripe.key')
new_ui     = client.get_flag('new-ui', False)

import { useConfig, useFlag } from '@westyx-nexus/sdk-react';

function MyComponent() {
  const apiBase = useConfig<string>('api.base_url');
  const newUI   = useFlag('new-ui', false);
  // ...
}

4. Enable live updates (recommended)

Value changes pushed from the console propagate to connected SDK clients within milliseconds.

// Already started by NexusClient.create().
// To reconnect manually: client.connectStream()

# Already started by NexusClient.create() in a background daemon thread.
# To reconnect manually: client.connect_stream()

// NexusProvider connects automatically.
// useFlag() and useConfig() re-render when values change.

Next steps

Secrets

Learn about secret versioning, file-type secrets, and audit trail.

Feature Flags

Set up A/B rollout and targeting rules.

Workload Identity

Eliminate static API keys with WIF on Kubernetes, AWS, GCP, or Azure.

SDK reference

Full reference for all 8 SDKs.

Getting started

How-to guides

Concepts

AI MCP Server

Beta

Prerequisites

0. Verify connectivity (optional)

1. Install the SDK

2. Initialize the client

3. Read values

4. Enable live updates (recommended)

Next steps

Secrets

Feature Flags

Workload Identity

SDK reference

​Prerequisites

​0. Verify connectivity (optional)

​1. Install the SDK

​2. Initialize the client

​3. Read values

​4. Enable live updates (recommended)

​Next steps

Secrets

Feature Flags

Workload Identity

SDK reference

Prerequisites

0. Verify connectivity (optional)

1. Install the SDK

2. Initialize the client

3. Read values

4. Enable live updates (recommended)

Next steps