Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add nexscope-ai/eCommerce-Skills --skill profit-margin-calculator-walmartgit clone --depth 1 https://github.com/nexscope-ai/eCommerce-SkillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/nexscope-ai/ecommerce-skills/profit-margin-calculator-walmart)<a href="https://agentmods.dev/skills/nexscope-ai/ecommerce-skills/profit-margin-calculator-walmart"><img src="https://agentmods.dev/badge/skills/nexscope-ai/ecommerce-skills/profit-margin-calculator-walmart/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/nexscope-ai/ecommerce-skills/profit-margin-calculator-walmart"><img src="https://agentmods.dev/badge/skills/nexscope-ai/ecommerce-skills/profit-margin-calculator-walmart.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 15 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00048 | $0.00566 |
| Opus 5 | $0.00024 | $0.00283 |
| Sonnet 5 | $0.00010 | $0.00113 |
| Haiku 4.5 | $0.00005 | $0.00057 |
Grade A, and why
profit-margin-calculator-walmart scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Profit Margin Calculator — Walmart 💰
Calculate product profitability for Walmart Marketplace sellers — cost breakdowns, profit margins, and WFS fee analysis.
Installation
npx skills add nexscope-ai/eCommerce-Skills --skill profit-margin-calculator-walmart -g
Cost Components
| Cost Item | Description |
|---|---|
| Product Cost | FOB purchase price |
| Inbound Shipping | Sea/air freight to WFS |
| WFS Fulfillment | Walmart Fulfillment Services |
| WFS Storage | Monthly storage fee |
| Referral Fee | Platform commission (8-15%) |
| Advertising | Walmart Connect ads |
| Return Cost | Return processing loss |
Walmart vs Amazon
| Item | Walmart | Amazon |
|---|---|---|
| Fulfillment | WFS | FBA |
| Referral fee | Lower | Higher |
| Monthly storage | No fee | Yes |
| Competition | Lower | High |
Usage
python3 scripts/calculator.py
python3 scripts/calculator.py '{"selling_price": 24.99, "product_cost": 6, "wfs_fee": 4.95}'
Output Example
💰 **Walmart Profit Analysis Report**
Selling Price $24.99 100.0%
────────────────────────────────────────
Product Cost -$6.00 24.0%
WFS Fulfillment -$4.95 19.8%
Referral Fee -$3.75 15.0%
...
────────────────────────────────────────
Net Profit $6.19 24.8%
Walmart Advantages
| Advantage | Benefit |
|---|---|
| No long-term storage | Better for slow movers |
| Lower referral fees | 6-15% vs 8-15% |
| Less competition | Easier ranking |
| Growing marketplace | More opportunities |
Referral Fee Rates
| Category | Rate |
|---|---|
| Electronics | 8% |
| Apparel | 15% |
| Home & Kitchen | 15% |
| Most categories | 8-15% |
Part of Nexscope AI — AI tools for e-commerce sellers.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 83 lines · 48 tokens per session scan A 941bf7f85379
profit-margin-calculator-walmart is a skill published in the GitHub repository nexscope-ai/eCommerce-Skills (914 stars, last pushed 17d ago), licensed MIT. It adds 48 tokens to every session and 566 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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amazon-fba-calculator
Amazon FBA Calculator - Complete fee breakdown and profit analysis.
amazon-wholesale-sourcing
Wholesale product sourcing — supplier discovery, negotiation, MOQ optimization, margin analysis.
expense-categorization
Classify expenses by category, department, and tax deductibility from transaction data. Use when the user requests expense categorization or provides relevant inputs for this workflow.
invoice-processing
Extract, validate, and categorize invoice data against purchase orders and GL codes. Use when the user requests invoice processing or provides relevant inputs for this workflow.
budget-planning
Create and manage budgets with variance analysis and departmental allocation. Use when the user requests budget planning or provides relevant inputs for this workflow.