D2 Tools

Free operating tools for marketplace economics, automation economics and production readiness.

D2 Tools turn formulas and control logic used in Commerce and AI & Automation work into interactive calculators and readiness checks. The current tools run from deterministic browser-side rules — no AI API is required to calculate the result.

Direct answer

What can I calculate or check here?

Model marketplace contribution, affiliate commission or automation time-value economics; derive a GMV Max break-even Ads boundary; verify marketplace P&L evidence readiness; or assess production controls for n8n, API and webhook systems.

Available tools

Eight deterministic tools for operating decisions.

TikTok Shop economics

TikTok Shop Profit Calculator

Model GMV, valid revenue, platform deductions, Ads, Affiliate commission, SKU COGS and other variable selling costs in one contribution view.

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Shopee economics

Shopee Profit Calculator

Model seller-funded discounts, user-entered platform deductions, Affiliate commission, COGS, fulfillment, Shopee Ads and contribution without assuming a universal Shopee fee rate.

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Marketplace P&L evidence

Marketplace P&L File Checker

Check whether Orders, settlement/finance, SKU cost, Ads and other scope-dependent evidence are controlled enough to proceed with a marketplace P&L model.

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GMV Max economics

GMV Max Break-even ROAS Calculator

Derive break-even Ads ratio and ROAS from the economics of the SKU instead of using a generic performance benchmark.

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Creator commerce economics

Affiliate Commission Calculator

Isolate affiliate or creator commission as a variable cost and see revenue remaining after commission before other marketplace costs.

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Automation economics

Automation ROI Calculator

Model time value, recurring tool cost, implementation cost, monthly net benefit, payback and 12-month ROI from assumptions you control.

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Integration reliability

API & Webhook Production Readiness Checker

Review authentication, webhook verification, schemas, idempotency, retries, rate limits, secrets, observability and recovery controls.

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Automation reliability

n8n Production Readiness Checker

Score source-of-truth design, security, idempotency, retries, observability, recovery and operating ownership with deterministic rules.

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How D2 tools are designed

Truth → formula → rule → decision support.

The score or result is derived from visible formulas and rules, not an opaque AI judgment.

Missing evidence is surfaced as an assumption or gap instead of silently treated as zero.

Platform rates and benchmarks are not invented: commerce economics come from the inputs entered by the operator.

Tool results are decision support, not a guarantee of platform performance, profit, ROI or production availability.

Every tool exposes a versioned #methodology contract with formulas or rules, inputs, outputs, limitations, a worked example and a copyable citation.

Decision boundary

A tool can expose a model or evidence gap. It cannot guarantee the market or production system.

Platform rules, fee labels, attribution, refunds, operational capacity, provider contracts, workflow dependencies and data quality can change. Use each result as a structured operating model, then reconcile it against the actual business or runtime evidence available.

Browse tool methodologies Discuss a real operating model