Engineering — Replace Billing Logic with a Runtime | Metrifox

Monetization infrastructure that replaces your billing complexity.

AI products don't fail at billing because of payments. They fail because monetization logic gets scattered across the codebase.

Every team eventually builds their own version of usage tracking, feature gating, credit systems, pricing logic, entitlement rules, and billing edge cases. Over time, it becomes fragile, inconsistent, and expensive to maintain.

Before · scattered logic

After · single runtime

Metrifox Runtime

One source of truth for who can do what, how much it costs, and how it gets billed.

Integrate in minutes. Same runtime, any stack.

TypeScript, Python, REST API

01 · Check
Gate features before execution

02 · Track
Record usage where value is created

03 · Credits
Plans, top-ups, overrides, one runtime

Language 

const access = await metrifox.usages.checkAccess({
  customerKey: "cust_123",
  featureKey: "generate_response",
});

if (!access.can_access) {
  throw new Error("Limit reached");
}

Real-time. No cached permissions.

The core loop

01
Check

02
Track

03
Enforce

04
Bill

Runtime guarantees

One integration. A permanent control layer.

Once connected, Metrifox becomes the runtime that governs how your product turns usage into revenue, across every customer, feature, and pricing model.

Monetization becomes a system, not a codebase.

Used by teams who refuse to let billing slow them down.

"We went from 3-week pricing changes to 5-minute experiments. Our product team now runs A/B tests on pricing like they run A/B tests on features. ACV is up 22% in 6 months."
CTO, AI Inference Platform
Outcome
+22% ACV

Your stack, unchanged. Your billing, transformed.

Metrifox fits seamlessly into your existing workflow. No migration. No disruption. Just better billing.

Payment

Cloud

Data

Observability

CRM

Analytics

Collaboration

Dev Tools

AI

Workflow

Quick start

Three steps. Live in minutes.

Drop in the SDK, send events, gate features. Your existing infra keeps working. Metrifox becomes the runtime that governs every priced surface.

01 Install SDK

npm install @metrifox/sdk

02 Send usage events

await metrifox.ingest({
  customer: "cust_123",
  metric: "api_calls",
  value: 1
})

03 Check entitlements

const access = await metrifox.check({
  customer: "cust_123",
  feature: "generate_response"
})

Start protecting your margins today.

No engineering overhead. No migration headaches. Just a runtime that makes billing disappear.

Questions, answered.

How fast can we go live with Metrifox?
Most teams ship their first metered, gated, and billed feature in under a day. Drop in the SDK, send events, and gate access with one call. No data migration required.

Additional FAQs