FastMoss - TikTok Top Selling Rankings

This skill guides you on how to query and analyze the TikTok top selling product rankings via the FastMoss data source, helping cross-border e-commerce sellers identify hot-selling products across TikTok's global markets by day, week, or month.

Core Concepts

The TikTok Top Selling Ranking tracks the best-performing products on TikTok Shop across 9 global markets. It reveals which products are leading in sales volume, GMV, and growth rate over configurable time windows (daily, weekly, monthly). This is an essential tool for product scouting, trend analysis, and competitive intelligence in TikTok e-commerce.

Data scope: The ranking covers 9 TikTok Shop markets and supports three time granularities -- day, week, and month -- via the dateInfo parameter. Each product entry includes sales volume, GMV, growth rate, commission rate, shop information, category, and more.

dateInfo format is important:

• type: "day" -> value: "2025-02-01" (YYYY-MM-DD)
• type: "week" -> value: "2025-18" (year-weekNumber)
• type: "month" -> value: "2025-02" (year-month)

Pagination: Results are paginated. Use page (page number, starting from 1) and pageSize (items per page, max 10, default 10) to navigate through the result set.

Parameter Guide

Parameter	Type	Required	Description
region	string	Yes	Market region code (US, GB, MX, ES, ID, VN, MY, TH, PH)
dateInfo	object	Yes	Date specification with type (day/week/month) and value (see format above)
category	string	No	Category name in English, matched to TikTok category ID. Non-English input should be translated first
orderby	object	No	Sorting: field (units_sold/gmv/total_units_sold/total_gmv/growth_rate) + order (desc/asc). Default: desc
page	integer	No	Page number, default 1
pageSize	integer	No	Items per page, max 10, default 10

Supported Markets

Code	Market
US	United States
GB	United Kingdom
MX	Mexico
ES	Spain
ID	Indonesia
VN	Vietnam
MY	Malaysia
TH	Thailand
PH	Philippines

Default market is US. Use US when the user does not specify a market.

How to Call

• API Endpoint: POST /fastmoss/productRankTopSelling (see references/api.md for full parameters/response/error codes)
• Python Script: python scripts/tiktok_top_selling_products.py '<JSON parameters>' [--inline]
• Cost constraint: This tool consumes credits; the same parameter combination in the same session is called only once by default, with 24h local caching in the script. On failure/empty results, do not automatically retry with different keywords, pagination, or filter changes; inform the user before making additional queries.

Output strategy (default script behavior):

• Always write the full response to <cwd>/nexscope/<YYYY-MM-DD>/<session>/data/nexscope-fastmoss-product-rank-top-selling-<timestamp>.json (<cwd> is the working directory at script execution time, i.e., the current project directory in Claude Code; <session> is taken from the SESSION_ID environment variable, auto-grouped by user task; do not write to /tmp, error if the current directory is not writable)
• Response body <= 8 KB: print the full JSON to stdout after writing to disk
• Response body > 8 KB: stdout only outputs a summary (top-level fields, common counts like total/costToken, length of the largest list field + first 3 samples)
• Add --inline to force full output to stdout (still writes to disk)

Data reading tip: Check the summary first to see if sufficient; for specific fields, prefer using jq or ConvertFrom-Json to extract from the saved JSON file on demand, avoiding loading the entire JSON into context.

Authentication

Set NEXSCOPE_API_KEY. Visit https://www.nexscope.ai/help/skills-external-access?co-from=skillNS to manage credits.

Usage Examples

1. Today's top selling products in the US (daily) Query the US market for a specific day to see which products lead in sales.

region: "US", dateInfo: {"type": "day", "value": "2026-04-15"}

2. Weekly top sellers in the UK Check the UK market for weekly best-performing products.

region: "GB", dateInfo: {"type": "week", "value": "2026-15"}

3. Monthly GMV leaders in Southeast Asia Scout the Indonesian market for monthly top sellers sorted by GMV.

region: "ID", dateInfo: {"type": "month", "value": "2026-03"}, orderby: {"field": "gmv", "order": "desc"}

4. Category-specific ranking Find top selling products in a specific category.

region: "US", dateInfo: {"type": "day", "value": "2026-04-15"}, category: "Beauty"

Data Fields (Response)

Field	API Name	Description
Product Title	title	Name of the product
Product ID	productId	Unique product identifier
Region	region	Market region code
Price	price	Product price
Min Price	minPrice	Lowest price
Max Price	maxPrice	Highest price
Currency	currency	Currency code
Total Sales	totalSaleCnt	Total units sold
1-Day Sales	totalSale1dCnt	Units sold in the last 1 day (when dateType=day)
7-Day Sales	totalSale7dCnt	Units sold in the last 7 days (when dateType=week)
30-Day Sales	totalSale30dCnt	Units sold in the last 30 days (when dateType=month)
Total GMV	totalSaleGmvAmt	Total gross merchandise value
1-Day GMV	totalSaleGmv1dAmt	GMV in the last 1 day (when dateType=day)
7-Day GMV	totalSaleGmv7dAmt	GMV in the last 7 days (when dateType=week)
30-Day GMV	totalSaleGmv30dAmt	GMV in the last 30 days (when dateType=month)
Growth Rate	growthRate	Sales growth rate (percentage)
Shop Name	shopName	Name of the seller's shop
Shop Total Units Sold	shopTotalUnitsSold	Total units sold by the shop
Shop Seller ID	shopSellerId	Unique shop seller identifier
Category Name	categoryName	Product category
Commission Rate	productCommissionRate	Commission rate in basis points (1000 = 10%)
Image URL	imageUrl	Product image URL
Delisted Status	offShelvesText	Delisted indicator ("Yes" = delisted, "No" = active)

Display Rules

1. Present data only: Show query results in clear tables without subjective business advice
2. Growth rate: Growth rate is in percentage -- show with % sign
3. Commission rate: Commission rate is in basis points (1000 = 10%) -- convert to percentage for display
4. Currency awareness: Always display currency alongside prices since different markets use different currencies
5. dateInfo format: Validate and remind users of the correct format for the selected time granularity
6. Delisted status: offShelvesText value "Yes" means delisted, "No" means active -- clarify this for users

Important Limitations

• dateInfo is mandatory: Both type and value must be provided with specific format requirements
• No keyword search: This tool does NOT support keyword search (use the product discovery skill for that)
• Max 10 items per page: The pageSize parameter cannot exceed 10
• Data delay: Data has T+1 statistical delay

User Expression & Scenario Quick Reference

Applicable -- TikTok top selling product rankings and trend analysis:

User Says	Scenario
"What are the top selling products on TikTok"	Top selling ranking lookup
"TikTok bestsellers this week", "hot products on TikTok Shop"	Weekly/daily ranking query
"TikTok GMV ranking", "highest revenue products on TikTok"	GMV-based ranking
"TikTok category hot sellers", "top selling beauty products on TikTok"	Category-specific ranking
"TikTok weekly product report", "monthly top sellers"	Time-dimension analysis
"FastMoss top selling", "FastMoss ranking data"	Direct data source reference
"Which products are growing fastest on TikTok"	Growth rate sorted ranking

Not applicable -- Needs beyond TikTok top selling rankings:

• Amazon product research or ABA keyword data
• TikTok advertising / ad campaign management
• TikTok content creation or video editing
• Product reviews or listing copywriting
• TikTok product keyword search (use the product discovery skill instead)
• Profit margin calculations or pricing strategy

Boundary judgment: When users say "product research" or "what's selling well", if the context clearly involves TikTok Shop or TikTok e-commerce rankings, this skill applies. If they are asking about Amazon, Shopify, or other platforms, it does not apply. If they want to search products by keyword rather than browse rankings, use the product discovery skill instead.