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BytesAgain β€Ί Skills β€Ί Stripemeter
πŸ¦€ ClawHub

Stripemeter

by @geminimir

Integrate Stripe usage-based billing with idempotent event ingestion, late-event handling, and pre-invoice reconciliation. Use when implementing usage meteri...

Versionv0.1.0
Downloads543
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TERMINAL
clawhub install stripemeter

πŸ“– About This Skill

name: stripemeter description: Integrate Stripe usage-based billing with idempotent event ingestion, late-event handling, and pre-invoice reconciliation. Use when implementing usage metering, tracking API calls or seats, pushing usage to Stripe, handling billing drift, or building usage-based pricing.

StripeMeter

StripeMeter is a Stripe-native usage metering system that ensures correct usage totals for usage-based billing. It dedupes retries, handles late events with watermarks, keeps running counters, and pushes only deltas to Stripe.

Quick Start

git clone https://github.com/geminimir/stripemeter && cd stripemeter
cp .env.example .env && docker compose up -d && pnpm -r build
pnpm db:migrate && pnpm dev

Core Concepts

Events (Immutable Ledger)

Every usage event stored with deterministic idempotency key. Events are never deleted or modified.

Counters (Materialized Aggregations)

Pre-computed aggregations (sum/max/last) by tenant, metric, customer, and period. Updated in near-real-time.

Watermarks (Late Event Handling)

Each counter maintains a watermark timestamp. Events within lateness window (default 48h) trigger re-aggregation.

Delta Push (Stripe Synchronization)

Tracks pushed_total per subscription item and only sends delta to Stripe.

API Endpoints

Ingest Events

curl -X POST http://localhost:3000/v1/events/ingest \
  -H "Content-Type: application/json" \
  -d '{
    "events": [{
      "tenantId": "your-tenant-id",
      "metric": "api_calls",
      "customerRef": "cus_ABC123",
      "quantity": 100,
      "ts": "2025-01-16T14:30:00Z"
    }]
  }'

Get Cost Projection

curl -X POST http://localhost:3000/v1/usage/projection \
  -H "Content-Type: application/json" \
  -d '{"tenantId": "your-tenant-id", "customerRef": "cus_ABC123"}'

Health & Metrics

  • Readiness: GET /health/ready
  • Metrics: GET /metrics
  • Events: GET /v1/events?tenantId=X&limit=10

    • Node.js SDK

    import { createClient } from '@stripemeter/sdk-node';
    const client = createClient({
  apiUrl: 'http://localhost:3000',
  tenantId: 'your-tenant-id',
  customerId: 'cus_ABC123'
});
    // Track usage
await client.track({
  metric: 'api_calls',
  customerRef: 'cus_ABC123',
  quantity: 100,
  meta: { endpoint: '/v1/search' }
});
    // Get live usage
const usage = await client.getUsage('cus_ABC123');
const projection = await client.getProjection('cus_ABC123');

    Python SDK

    from stripemeter import StripeMeterClient
    client = StripeMeterClient(
    api_url="http://localhost:3000",
    tenant_id="your-tenant-id",
    customer_id="cus_ABC123"
)
    client.track(
    metric="api_calls",
    customer_ref="cus_ABC123",
    quantity=100
)

    Stripe Billing Driver

    For direct Stripe integration, use the stripe-driver package:

    import { StripeBillingDriverImpl } from '@stripemeter/stripe-driver';
    const driver = new StripeBillingDriverImpl({
  liveKey: process.env.STRIPE_SECRET_KEY,
  testKey: process.env.STRIPE_TEST_SECRET_KEY
});
    // Record usage to Stripe
await driver.recordUsage({
  mode: 'live',
  stripeAccount: 'default',
  subscriptionItemId: 'si_xxx',
  quantity: 100,
  periodStart: '2025-01-01',
  idempotencyKey: 'unique-key'
});
    // Get usage summary
const summary = await driver.getUsageSummary(
  'si_xxx',
  '2025-01-01',
  'default'
);

    Shadow Mode

    Test Stripe usage posting without affecting live invoices:

    1. Set STRIPE_TEST_SECRET_KEY in environment 2. Mark price mapping with shadow=true 3. Provide shadowStripeAccount, shadowPriceId 4. Live invoices remain unaffected

    Pricing Simulator

    import { InvoiceSimulator } from '@stripemeter/pricing-lib';
    const simulator = new InvoiceSimulator();
    const result = simulator.simulate({
  customerId: 'test',
  periodStart: '2024-01-01',
  periodEnd: '2024-02-01',
  usageItems: [{
    metric: 'api_calls',
    quantity: 25000,
    priceConfig: {
      model: 'tiered',
      currency: 'USD',
      tiers: [
        { upTo: 10000, unitPrice: 0.01 },
        { upTo: 50000, unitPrice: 0.008 },
        { upTo: null, unitPrice: 0.005 }
      ]
    }
  }]
});

    Project Structure

    stripemeter/
β”œβ”€β”€ packages/
β”‚   β”œβ”€β”€ core/           # Shared types, schemas
β”‚   β”œβ”€β”€ database/       # Drizzle ORM + Redis
β”‚   β”œβ”€β”€ pricing-lib/    # Pricing calculator
β”‚   β”œβ”€β”€ stripe-driver/  # Direct Stripe API driver
β”‚   β”œβ”€β”€ sdk-node/       # Node.js SDK
β”‚   └── sdk-python/     # Python SDK
β”œβ”€β”€ apps/
β”‚   β”œβ”€β”€ api/            # REST API (Fastify)
β”‚   β”œβ”€β”€ workers/        # Background workers (BullMQ)
β”‚   β”œβ”€β”€ admin-ui/       # Admin dashboard
β”‚   └── customer-widget/# Embeddable widget

    Environment Variables

    STRIPE_SECRET_KEY=sk_live_xxx       # Live Stripe key
STRIPE_TEST_SECRET_KEY=sk_test_xxx  # Test Stripe key (for shadow mode)
DATABASE_URL=postgres://...         # PostgreSQL connection
REDIS_URL=redis://...               # Redis connection

    Common Tasks

    Verify Idempotency

    # Send same event twice - counts once
TENANT_ID=$(uuidgen) bash examples/api-calls/send.sh
curl http://localhost:3000/metrics | grep ingest

    Run Reconciliation

    Check drift between local totals and Stripe:

  • Differences beyond 0.5% epsilon trigger investigation
  • See RECONCILIATION.md for runbook

    • Replay Late Events

    curl -X POST http://localhost:3000/v1/replay \
  -H "Content-Type: application/json" \
  -d '{"tenantId": "X", "dryRun": true}'

    Additional Resources

  • API Documentation
  • Simulator Guide
  • Reconciliation Runbook
  • Alert Configuration

    • πŸ’‘ Examples

    git clone https://github.com/geminimir/stripemeter && cd stripemeter
cp .env.example .env && docker compose up -d && pnpm -r build
pnpm db:migrate && pnpm dev