API billing, pricing, and cost estimate tools.

Match downstream usage, upstream charges, and payment settlements to find missing records, billing drift, wallet funding errors, and negative-margin API traffic.

Estimate API costs, calculate API charges, and model monthly usage cost before launching a paid developer product.

Compare editable AI API price presets and estimate token costs, cache savings, monthly usage, gateway margin, and sustainable pricing.

Compare ChatGPT Codex subscription plans with direct API usage, then calculate relay revenue, cost, profit, and gross margin per million tokens.

Project daily users, requests, token volume, monthly spend, and usage-based API billing for paid API keys.

Compare RPM, TPM, concurrency, latency, and user request frequency to design practical rate limits.

Calculate API pricing for paid API access, target margin, free tiers, usage-based billing, and monthly API profit.

Compare uncached and cached input token costs and estimate monthly prompt caching savings.

Compare realtime and batch token processing costs for asynchronous AI API workloads.

Check whether system prompts, history, tools, user input, and reserved output fit within a model context window.

Turn a monthly API budget into token, request, and per-user usage quotas with an operating reserve.

Convert an API credit balance into dollar value, token capacity, request capacity, and estimated months of usage.

Estimate savings from routing a share of token traffic to a lower-cost model while preserving premium capacity.

Design a sustainable monthly API plan price from included usage, utilization, fixed costs, fees, and target margin.

Convert an uptime target into allowed downtime and track remaining monthly error budget.

Generate plain-English API key usage rules, billing terms, refund language, and acceptable use policy sections.