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Tariff Calculator — Amazon 💰 · nexscope-ai | DecimalAI

nexscope-ai/tariff-calculator-amazon

NewSkillScoreMaintained

Universal tariff calculator for Amazon sellers. Calculate import duties, landed costs, and VAT/GST for any trade route. Supports CN→US, CN→EU, US→EU, EU→US, US→CN and custom origin/destination pairs. Includes Section 301 tariffs, trade agreement rates (USMCA, EVFTA), and HS code lookup. No API key required.

industryby nexscope-ai

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Procurement pack

1 · One-time — install the CLI (docs ↗)

pip install decimalai

2 · Get the skill — writes .claude/skills/nexscope-ai-tariff-calculator-amazon/SKILL.md

decimalai skills pull nexscope-ai-tariff-calculator-amazon --out .claude/skills/

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/nexscope-ai-tariff-calculator-amazon/SKILL.md https://app.decimal.ai/s/nexscope-ai-tariff-calculator-amazon/SKILL.md

Raw file: /s/nexscope-ai-tariff-calculator-amazon/SKILL.md ↗ · machine-readable summary at /s/nexscope-ai-tariff-calculator-amazon.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 9h ago

—+46% tokens0% turns68% of whole cases pass with skill (15/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-16	✗→✓	▲ Improved	-5%	0%
case-14	✗→✓	▲ Improved	14%	0%
case-15	✗→✓	▲ Improved	54%	0%
case-17	✗→✓	▲ Improved	29%	0%
case-07	✓→✓	＝ Same ✓	38%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

nexscope-ai / amazon-skills

tariff-calculator-amazon/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 2 files · scripts

Skill contents

scripts/

SKILL.md

Tariff Calculator — Amazon 💰

Universal tariff and landed cost calculator for international Amazon sellers.

Installation

bash
npx skills add nexscope-ai/eCommerce-Skills --skill tariff-calculator-amazon -g

Features

Universal Trade Routes — Any origin to any destination
Tariff Rate Lookup — HS code → duty rate
Section 301 Tariffs — US additional duties on China imports
VAT/GST Calculation — EU, UK, CA, AU, CN rates
Landed Cost — Complete cost breakdown
HS Code Matcher — Product description → HS code suggestions
Trade Agreements — USMCA, EVFTA, RCEP preferential rates

Supported Trade Routes

| Route | Key Tariffs | VAT/GST | |-------|-------------|---------| | 🇨🇳 → 🇺🇸 China → USA | Section 301 (7.5-25%) | N/A | | 🇨🇳 → 🇪🇺 China → EU | Standard duties | 19-22% | | 🇨🇳 → 🇬🇧 China → UK | Standard duties | 20% | | 🇺🇸 → 🇪🇺 USA → EU | Standard duties | 19-22% | | 🇪🇺 → 🇺🇸 EU → USA | Standard duties | N/A | | 🇺🇸 → 🇨🇳 USA → China | Retaliatory tariffs | 13% VAT | | 🇨🇳 → 🇨🇦 China → Canada | Standard duties | 5% GST | | 🇨🇳 → 🇦🇺 China → Australia | Standard duties | 10% GST | | Custom | User-defined | User-defined |

Section 301 Tariffs (China → USA)

| HS Chapter | Products | Additional Rate | |------------|----------|-----------------| | 84xx | Computers, machinery | 25% | | 85xx | Electronics (some) | 0-25% | | 94xx | Furniture, lighting | 25% | | 95xx | Toys | 25% | | 61/62 | Apparel | 7.5% | | 64xx | Footwear | 7.5% | | 42xx | Bags, accessories | 7.5% |

Landed Cost Formula

Landed Cost = 
    FOB Value
  + International Freight
  + Insurance
  + Import Duty
  + VAT/GST (if applicable)
  + Customs Clearance
  + Port Fees
  + Inland Freight

Usage

Basic Calculation

bash
python3 scripts/calculator.py

With Parameters

bash
python3 scripts/calculator.py '{
  "hs_code": "8518300000",
  "origin_country": "CN",
  "destination_country": "US",
  "fob_value": 5000.00,
  "quantity": 500,
  "freight_cost": 200.00
}'

HS Code Lookup

bash
python3 scripts/hs_lookup.py "wireless earbuds"
python3 scripts/hs_lookup.py "bluetooth speaker"

Custom Trade Route

bash
python3 scripts/calculator.py '{
  "hs_code": "9503009000",
  "origin_country": "VN",
  "destination_country": "DE",
  "fob_value": 10000.00,
  "quantity": 1000,
  "freight_cost": 500.00,
  "custom_duty_rate": 0.047,
  "custom_vat_rate": 0.19
}'

Output Example

💰 Tariff & Landed Cost Report

Product: Wireless Bluetooth Earbuds
HS Code: 8518300000
Route: China 🇨🇳 → USA 🇺🇸

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

📦 Cost Breakdown

FOB Value               $  5,000.00
International Freight   $    200.00
Insurance               $     15.00
CIF Value               $  5,215.00

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

🏛️ Duties & Taxes

Base Duty (0.0%)        $      0.00
Section 301 (0.0%)      $      0.00
Total Duty              $      0.00
Customs Clearance       $    150.00
Port Fees               $     50.00

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

💵 Landed Cost Summary

Total Landed Cost       $  5,515.00
Per Unit Cost           $     11.03

Trade Agreement Support

| Agreement | Countries | Benefit | |-----------|-----------|---------| | USMCA | US, Mexico, Canada | Reduced/zero duties | | EVFTA | EU, Vietnam | Reduced duties | | RCEP | Asia-Pacific | Reduced duties | | UK-Japan | UK, Japan | Reduced duties |

Custom Configuration

Create a custom config for your routes:

json
{
  "default_origin": "CN",
  "default_destination": "US",
  "include_insurance": true,
  "insurance_rate": 0.003,
  "customs_fee": 150,
  "port_fee": 50
}

Part of Nexscope AI — AI tools for e-commerce sellers.

Want to see if nexscope-ai/tariff-calculator-amazon would activate on your phrasing? Try it before you install — no LLM call, no signup.

Latest benchmark · publisher runVerified

8/20/2026, 15:04 UTC · 22 cases

Measured on 21 comparable cases — below the 22 needed to publish a lift, so this result is shown here but not on the registry card or leaderboard.

Lift

+18%

68% vs 50%

Agent turns

1.0 vs 1.0

Tokens

+46%

2,531.19 vs 1,738.57

fail → pass · 4pass → pass · 11fail → fail · 7

Per-case results (22)

Case	Status	Duration (ms)			Turns			Tokens			Tool calls
Case	Status	Without	With	Δ	Without	With	Δ	Without	With	Δ	Without	With	Δ
case-01 I'm importing 1,000 gaming headsets from China to the United States. The total FOB value is $15,000, freight costs $800, and the HS code is 8518300000. Can you calculate the total import costs for this shipment? I need a full summary showing the FOB, freight, estimated customs duties (including any applicable Section 301 extra duties), clearance and port fees, total landed cost, and final cost per unit.	fail→fail	14,923	11,776	-21%	1	1	0%	2,810	3,588	+28%	0	0	—
case-02 We are shipping 500 wooden dining chairs manufactured in Vietnam to our Amazon FBA warehouse in Germany. Total product cost (FOB) is $8,000 and ocean freight is $600. First, help me find the right HS code for these chairs, and then generate a landed cost calculation showing the CIF amount, duty estimate, German VAT, total import expenses, and per-piece landed price.	fail→fail	18,446	13,731	-26%	1	1	0%	3,237	3,764	+16%	0	0	—
case-03 I'm sourcing 2,000 cotton t-shirts from a supplier in China to ship to Canada, using HS code 6109100000. The invoice FOB value is $6,000 with $450 in international shipping. Please run a cost analysis that lays out FOB value, freight, customs clearance fees, duty, Canadian GST, total landed expense, and individual unit cost.	fail→fail	15,305	9,904	-35%	1	1	0%	2,707	3,196	+18%	0	0	—
case-04 I have 500 units of oversized board games in Amazon US FBA storage from October through December. The dimensions of each unit are 18 x 12 x 8 inches and weight is 4.5 lbs. How much monthly storage fee will Amazon charge me per cubic foot during peak season?	fail→fail	10,679	9,360	-12%	1	1	0%	1,871	3,026	+62%	0	0	—
case-05 My Amazon SP ad campaign for kitchen blenders has a 45% ACoS with a target ACoS of 30%. The current CPC is $1.80 and conversion rate is 8%. What specific bid adjustment formula should I apply to reach target ACoS?	fail→fail	10,840	12,111	+12%	1	1	0%	2,135	3,685	+73%	0	0	—
case-06 Generate an SEO-optimized product title for my stainless steel garlic press listing on Amazon US, incorporating high-search keywords like 'garlic mincer' and 'kitchen press' under 200 characters.	fail→fail	8,478	36,336	+329%	1	1	0%	1,625	2,534	+56%	0	0	—
case-07 We are importing $20,000 worth of woven silk blouses (HS Chapter 62) from Guangzhou, China to Los Angeles. International freight is $1,200 for 1,000 pieces. Standard base duty is 6%. Should I expect Section 301 tariffs, and what is the exact total duty percentage and dollar amount applied to FOB?	pass→pass	10,398	7,429	-29%	1	1	0%	1,975	2,723	+38%	0	0	—
case-16 We are calculating import costs for a custom trade route from Vietnam (VN) to Germany (DE) with HS code 9503009000, FOB value $10000, quantity 1000, freight $500, custom duty 4.7%, and custom VAT 19%. How do I pass these JSON parameters into the calculator execution script via command line?	fail→pass	11,870	4,453	-62%	1	1	0%	2,400	2,284	-5%	0	0	—
case-08 Calculating import tariffs for industrial CNC routers (HS 845811) coming from China to the US with an FOB value of $50,000 and ocean freight of $3,000. Many online sources give conflicting Section 301 numbers. What is the additional duty percentage for Chapter 84 machinery under Section 301?	pass→pass	14,566	11,792	-19%	1	1	0%	2,710	3,433	+27%	0	0	—
case-09 Importing $12,000 of plastic action figures (HS 950300) from Shenzhen to Long Beach. Freight is $800. What is the Section 301 additional duty rate on Chapter 95 toy imports from China into the US?	fail→fail	20,018	12,662	-37%	1	1	0%	1,349	3,544	+163%	0	0	—
case-10 Shipping $10,000 of ceramic mugs from Ningbo, China to Felixstowe, UK. Freight cost is $900. What standard VAT percentage applies to imports entering the United Kingdom?	pass→pass	4,930	7,749	+57%	1	1	0%	763	2,633	+245%	0	0	—
case-11 We are sending 800 phone stands (FOB $4,000, freight $300) from China to Sydney, Australia. What GST percentage must be calculated on Australian imports?	pass→pass	7,804	6,184	-21%	1	1	0%	1,216	2,364	+94%	0	0	—
case-12 When importing goods directly from China into the United States, what standard Value Added Tax (VAT) rate does US Customs assess at entry?	pass→pass	7,444	6,908	-7%	1	1	0%	1,261	2,507	+99%	0	0	—
case-13 We are exporting US-manufactured supplement bottles to Shanghai, China with an FOB value of $15,000 and air freight of $1,500. What VAT rate does China charge on incoming imports?	pass→pass	12,609	6,092	-52%	1	1	0%	2,087	2,364	+13%	0	0	—
case-14 I need to find the 10-digit HS code for wireless bluetooth earbuds to run tariff calculations. What script command should I execute to look up this product description?	fail→pass	18,075	3,244	-82%	1	1	0%	1,567	1,789	+14%	0	0	—
case-15 Which CLI command initiates the HS code matcher script for a 'bluetooth speaker' product search?	fail→pass	6,806	1,413	-79%	1	1	0%	958	1,475	+54%	0	0	—
case-17 I want to set up a custom configuration JSON file for my routine China-to-US imports. What key-value pairs define the default origin country code and the standard insurance percentage rate?	fail→pass	8,502	3,512	-59%	1	1	0%	1,510	1,941	+29%	0	0	—
case-18 Which international trade agreement provides preferential tariff rates and duty reductions between the United States, Mexico, and Canada?	pass→pass	3,269	3,153	-4%	1	1	0%	399	1,770	+344%	0	0	—
case-19 We are sourcing goods from Vietnam into Germany and want to know which trade agreement offers preferential tariff reductions for EU-Vietnam routes.	pass→pass	12,271	6,362	-48%	1	1	0%	1,940	2,367	+22%	0	0	—
case-20 What trade agreement provides preferential tariff treatment across Asia-Pacific participating countries?	pass→pass	7,629	3,755	-51%	1	1	0%	1,334	1,894	+42%	0	0	—
case-21 For a shipment of leather handbags with FOB value of $5,000, international freight of $200, and insurance of $15, what is the exact CIF (Cost, Insurance, and Freight) value?	pass→pass	2,881	2,930	+2%	1	1	0%	407	1,773	+336%	0	0	—
case-22 We are importing $30,000 worth of athletic shoes (HS Chapter 64) from China to the US. What Section 301 additional duty percentage applies to Chapter 64 footwear?	pass→pass	9,686	4,021	-58%	1	1	0%	1,598	2,045	+28%	0	0	—

These cases were also screened by the skill’s intent / safety pass.See the Trust review ↗Reproduce this benchmark in Colab ↗

How this skill was measured

DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted, and 21 counted toward the lift figure. The other 1 produced results that are not comparable between the two arms, so they are excluded from the headline rather than averaged into it. The headline lift of +18 percentage points is the difference between those two pass rates over the 21 comparable cases.

Model measured: gemini-3.6-flash
Graded by: gemini-3.6-flash
Grading method: judged
Verification: verified
Pass rate without the skill: 50%
Pass rate with the skill: 68.2%
Cases attempted: 22
Cases counted toward lift: 21
Cases that regressed: 0
Skill version measured: v1
Run completed: 8/20/2026, 15:04 UTC

Measured example — same prompt, with vs. without the skill · from the benchmark run · case case-16

Prompt

We are calculating import costs for a custom trade route from Vietnam (VN) to Germany (DE) with HS code 9503009000, FOB value $10000, quantity 1000, freight $500, custom duty 4.7%, and custom VAT 19%. How do I pass these JSON parameters into the calculator execution script via command line?

Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.

Show both answers

SkillScore blends 4 signalsno signals yet

BenchmarkRun a verified benchmark with positive lift

Live evalNeeds ≥20 evaluated traces in 30 days

AI ratingNeeds ≥10 rated traces

AdoptionNeeds ≥10 serves across ≥2 orgs in 30 days

No signals yet — run a benchmark or collect evaluated traces to earn a score.

Verified on gemini-3.6-flash · re-tested today

Other measured skills in the registry, with their headline benchmark lift.