Add billing to your app

Step 3 of 3. With Stripe connected and your plans defined, you can now use billing inside your app. You can detect a first-time user and show them your plans, give users a subscription page to upgrade or downgrade, and surface billing statuses, like a payment that didn’t go through. This page briefly covers each capability and links out where we go deeper.

Prerequisite: auth + bootstrap

Billing rides on the same setup as auth. Before anything here works you need Bridge auth configured and <BridgeBootstrap /> mounted in your root layout. See Authentication if you haven’t done that yet, and How billing works for the model.

Billing state is already live, with no init call

Once bridgeBootstrap() runs in your +layout.ts and <BridgeBootstrap /> mounts in your +layout.svelte, billing is already live. Bootstrap fetches the subscription for the current workspace (called a tenant in the API), auto-mounts the billing notice/gate, and honors your configured billing routes. There is no separate billing init call.

State lands on the unified bridge object and updates over the live channel (a persistent realtime connection the SDK maintains):

<script lang="ts">
  import { bridge } from '@nebulr-group/bridge-svelte';

  const subscription = bridge.tenant.subscription;   // plan, status, trial
  const entitlements = bridge.tenant.entitlements;   // what the plan grants
</script>

{#if $subscription}
  <p>Plan: {$subscription.plan.name} ({$subscription.status})</p>
{/if}

Configure your billing routes

Add a billing block to the BridgeConfig you already pass to bridgeBootstrap in +layout.ts:

// src/routes/+layout.ts
import type { LayoutLoad } from './$types';
import type { BridgeConfig } from '@nebulr-group/bridge-svelte';
import { bridgeBootstrap } from '@nebulr-group/bridge-svelte';

export const ssr = false;

export const load: LayoutLoad = async ({ url }) => {
  const config: BridgeConfig = {
    appId: import.meta.env.VITE_BRIDGE_APP_ID,
    loginRoute: '/auth/login',
    billing: {
      paywallRoute: '/subscription',       // send plan-less workspaces here
      paymentErrorRoute: '/payment-error', // land here if a checkout confirmation fails
    },
  };

  await bridgeBootstrap(url, config);
  return {};
};

• paywallRoute: when set, bootstrap redirects an authenticated workspace that hasn’t selected a plan here before the page renders. Point it at wherever your <PlanSelector> lives. (Workspaces that opt out via paymentsAutoRedirect: false are exempt.)
• paymentErrorRoute: where Bridge sends the user if a Stripe checkout confirmation fails on the return trip. Defaults to /payment-error.

Both are optional. Leave paywallRoute unset if you’d rather gate the app with <BridgePaywall> (below) than redirect.

Adding billing to your UI

Here are three use cases for billing in your UI:

1. Letting users select a plan after first signup: wrap your root layout in <BridgePaywall>; it blocks the app and shows a plan picker until the workspace has an active plan, so a brand-new user picks a plan before they get in:

<!-- src/routes/+layout.svelte -->
<script lang="ts">
  import { BridgePaywall } from '@nebulr-group/bridge-svelte';
  let { children } = $props();
</script>

<BridgePaywall successRedirect="/welcome" cancelRedirect="/subscription">
  {@render children()}
</BridgePaywall>

→ Require a plan to use the app

2. A self-service subscription page: drop <PlanSelector /> onto a route. It loads all the plans so your users can upgrade or downgrade directly from your app:

<!-- src/routes/subscription/+page.svelte -->
<script lang="ts">
  import { PlanSelector } from '@nebulr-group/bridge-svelte';
</script>

<PlanSelector successRedirect="/subscription/success" cancelRedirect="/subscription" />

→ Choose & switch plans

3. Surface billing health: <BridgeBillingNotice /> renders nothing while the subscription is healthy and the right banner (trial ending, payment failed, canceled) when it needs attention. Put it once in your root layout:

<script lang="ts">
  import { BridgeBillingNotice } from '@nebulr-group/bridge-svelte';
</script>

<BridgeBillingNotice />

→ Warn about billing problems

That’s the whole quickstart. From here, the rest of the billing section covers depth: subscription status, usage limits, free trials, the billing portal, and failed-payment handling, each building on the live bridge object you now have wired up.