UsageBox tools

Use the model before you use the product

Small, no-account tools for recurring usage-system questions: workload cost, pricing and margin, retry semantics, and what percentage-based billing fees mean at your actual volume.

AI economics

LLM Cost Per Task Calculator

Compare two workload shapes using uncached input, cache reads, cache writes, output, retry overhead and your own provider rates.

Calculate cost per task →

API monetization

AI & API Pricing Margin Calculator

Compare cost-plus markup, subscription plus overage, and prepaid credit-pack economics using your own usage and variable cost. UsageBox does not operate the credit ledger — it measures what draws it down.

Model pricing and margin →

Architecture selection

Usage Metering vs Billing Platform Selector

Answer five boundary questions to choose between an independent meter, full billing platform, biller-native metering or open-source stack.

Choose the architecture →

Usage API correctness

Idempotency Retry Simulator

See accepted, duplicate and conflict behavior before you put an idempotency-key pattern into billable-event ingestion.

Simulate retries →

Stripe migration

Stripe Usage Records Migration Checker

Inventory legacy UsageRecord, aggregate_usage, action=set and billing_threshold dependencies before moving to Stripe Billing Meters.

Check the migration surface →

Billing economics

Stripe Billing Fee Calculator

Compare the current 0.7% pay-as-you-go Billing fee with Stripe's published US annual monthly tiers at your Billing volume.

Calculate Stripe Billing fees →

When the tool becomes production traffic

UsageBox keeps the billable quantity independent: retry-safe ingestion, retained raw events and monthly rollups without owning your provider pricing or invoice stack.

Preview the APISee metering architecture