Margin Guard
Profitability auditor for Etsy and Shopify sellers that calculates landed costs and enforces strict margin thresholds.
$17
Works with the AI tools you already use
Claude Code
Cursor
Codex CLI
GitHub Copilot
Gemini CLI+20 moreClaude CodeCursorCodex CLIGitHub CopilotGemini CLI
OpenClaw
Manus
Grok+17 agentsMargin Guard
Example session with this skill installed
I want to sell a t-shirt on Etsy. Printify cost is $12.50, shipping is $5.25. I'm thinking of charging $35. Is this profitable?
- Read your context and instructions
- Compiled the margin guard
I have calculated the margins for your Etsy t-shirt listing using the standard expense template.
Margin Analysis: Etsy T-Shirt
| Line Item | Value | % of Revenue |
|---|---|---|
| Intended Sale Price | $35.00 | 100.00% |
| Landed Cost (Base + Ship) | $17.75 | 50.71% |
| Etsy Transaction Fee (6.5%) | $2.28 | 6.51% |
| Payment Processing + FX (4.5%) | $1.58 | 4.51% |
| Etsy Ads (5% blended) | $1.75 | 5.00% |
| Offsite Ads (3.5% blended) | $1.23 | 3.51% |
| Reprints & Damage (3%) | $1.05 | 3.00% |
| Listing Fee | $0.20 | 0.57% |
| Business Overhead (12%) | $4.20 | 12.00% |
| Net Profit | $4.96 | 14.17% |
Decision: ⚠️ FIX PRICE
Reasoning:
Your landed cost is
50.71% of the sale price. To meet the safe margin threshold (Landed Cost ≤ 45%), your minimum sale price should be
$39.05 (Landed Cost × 2.2). At $35.00, your net margin is too thin to absorb unexpected shifts in ad spend or returns.
Next steps
- Increase the sale price to at least $39.99 to clear the 2.2x safety multiplier.
- Compare other Printify providers to see if you can bring the landed cost below $15.75.
- If you cannot raise the price due to competition, consider this product a low-margin "loss leader" only.
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
The problem
E-commerce sellers often ignore landed costs and hidden platform fees, leading to products that look profitable on paper but lose money in reality. Calculating manual margins for Etsy or Shopify across different print-on-demand providers is slow and error-prone.
What it does
- Calculates landed cost by combining base product prices with shipping tiers.
- Enforces strict margin thresholds like Etsy's 2.2x rule and Shopify's 38% COGS limit.
- Accounts for platform-specific fees including Etsy Offsite Ads and Zendrop transaction fees.
- Provides a binary decision (LIST/FIX/DO NOT LIST) based on real mathematical viability.
- Recommends specific pricing adjustments or provider switches to rescue failing margins.
Why this beats prompting it yourself
General AI often ignores the "landed cost" distinction or forgets platform-specific overhead like FX fees and damage reserves. This skill uses hardcoded thresholds and expense templates that ensure you never overlook the hidden costs that kill bootstrapped stores.
Use cases
- Vetting new Printify products before syncing them to an Etsy storefront.
- Auditing Shopify collections to identify items with a Cost of Goods Sold (COGS) above 38%.
- Calculating the minimum viable sale price for a new Zendrop drop-shipping campaign.
- Evaluating if a high-shipping provider is sabotaging a product's net margin.
Known limitations
Requires manual input of base cost and shipping values. Assumes standard Etsy/Shopify fee structures and may need adjustment for high-volume negotiated rates.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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Click the path to copy it. Create the folder if it does not exist yet.
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