Query top N suppliers or buyers by trade volume — retrieve ranked lists of suppliers or buyers for a given country pair and year, with cursor-based pagination for seamless browsing. Enables comprehensive supplier and buyer ranking analysis to identify key trade partners and assess market concentration. Designed for sourcing agents, export teams and trade analysts who need to identify top trading counterparts, evaluate supplier market share and analyze buyer concentration for strategic procurement and sales planning across global customs data.

Query top N suppliers or buyers by trade volume — retrieve ranked lists of suppliers or buyers for a given country pair and year, with cursor-based pagination. Trigger: top suppliers, top buyers, supplier ranking, buyer ranking, trade volume ranking, company top N

Customs Overview Top N

Query top N suppliers or buyers by trade volume using the UpKuaJing Open Platform API.

Overview

This skill provides ranked lists of top suppliers or buyers from UpKuaJing's customs database. Given an origin country, arrival country, year, and company type, it returns a paginated list of top companies ranked by trade volume, including quarterly and monthly trade statistics.

Running Scripts

Environment Setup

1. Check Python: python --version
2. Install dependencies: pip install -r requirements.txt

Script directory: scripts/*.py Run example: python scripts/*.py

Important: Always use direct script invocation like python scripts/customs_overview_top_n.py. Do NOT use shell compound commands like cd scripts && python customs_overview_top_n.py

Top N Query (customs_overview_top_n.py)

• Return granularity: One record per company
• Use cases: Find top suppliers or buyers in a trade route, identify key trading partners, analyze market concentration
• Examples:
  • "Show top 10 suppliers from China to US in 2025"
  • "List top buyers importing from China to US in 2025"
• Parameters: See Top N API

API Key and Top-up

This skill requires an API key. The API key is stored in the ~/.upkuajing/.env file:

bash

cat ~/.upkuajing/.env

Example file content:

text

UPKUAJING_API_KEY=your_api_key_here

API Key Not Set

First check if the ~/.upkuajing/.env file has UPKUAJING_API_KEY; If UPKUAJING_API_KEY is not set, prompt the user to choose:

1. User has one: User provides it (manually add to ~/.upkuajing/.env file)
2. User doesn't have one: You can apply using the interface (auth.py --new_key), the new key will be automatically saved to ~/.upkuajing/.env Wait for user selection;

Account Top-up

When API response indicates insufficient balance, explain and guide user to top up:

1. Create top-up order (auth.py --new_rec_order)
2. Based on order response, send payment page URL to user, guide user to open URL and pay, user confirms after successful payment;

Get Account Information

Use this script to get account information for UPKUAJING_API_KEY: auth.py --account_info

API Key and UpKuaJing Account

• Newly applied API key: Register and login at UpKuaJing Open Platform, then bind account

Fees

All API calls incur fees, different interfaces have different billing methods.

Latest pricing: Users can visit Detailed Price Description Or use: python scripts/auth.py --price_info (returns complete pricing for all interfaces)

Query Billing Rules

Billed by number of calls, each call returns one page of top N rankings:

• Each API call incurs a fee
• Before execution:
  1. Inform user that this query will incur a fee
  2. Stop, wait for explicit user confirmation in a separate message, then execute script

Fee Confirmation Principle

Any operation that incurs fees must first inform and wait for explicit user confirmation. Do not execute in the same message as the notification.

Workflow

Decision Guide

User Intent	Use API
"Show top 10 suppliers from China to US in 2025"	Top N Query (companyType=1)
"List top buyers importing from China to US in 2025"	Top N Query (companyType=2)
"Find the largest exporters from China to US"	Top N Query (companyType=1)

Usage Examples

Query Top N

User request: "Show top suppliers from China to US in 2025"

bash

python scripts/customs_overview_top_n.py --params '{"originCountryCode":"CN","arrivalCountryCode":"US","year":2025,"companyType":1}'

Query top buyers:

bash

python scripts/customs_overview_top_n.py --params '{"originCountryCode":"CN","arrivalCountryCode":"US","year":2025,"companyType":2}'

Query the next page:

bash

python scripts/customs_overview_top_n.py --params '{"originCountryCode":"CN","arrivalCountryCode":"US","year":2025,"companyType":1,"cursor":"eyJzdGFydCI6MH0="}'

Error Handling

• API key invalid/non-existent: Check UPKUAJING_API_KEY in ~/.upkuajing/.env file
• Insufficient balance: Guide user to top up
• Invalid parameters: Must first check the corresponding API documentation in references/ directory, get correct parameter names and formats from documentation, do not guess

API Documentation Reference

• Top N: Check references/customs-overview-top-n-api.md

Best Practices

1. Check API documentation:

   • Before executing queries, must first check the corresponding API reference documentation
   • Check references/customs-overview-top-n-api.md
   • Do not guess parameter names, get accurate parameter names and formats from documentation

2. Company type:

   • companyType=1 for suppliers (exporters/sellers)
   • companyType=2 for buyers (importers/purchasers)

3. Pagination:

   • Use the cursor parameter from the response to fetch the next page
   • If no cursor is returned, there are no more pages

4. Cross-skill usage:

   • Use customs-overview-summary first to get overview, then drill into top companies
   • Company IDs from results can be used in customs-company-stats or customs-company-trends for detailed company analysis
   • Company names from results can be searched in upkuajing-customs-trade-company-search

Notes

• year and companyType are both required
• companyId is the internal ID for the company in UpKuaJing's database
• latestTradeDate is a Unix timestamp in milliseconds
• File paths use forward slashes on all platforms
• Prohibit outputting technical parameter format: Do not display code-style parameters in responses, convert to natural language
• Do not estimate or guess per-call fees — use python scripts/auth.py --price_info to get accurate pricing information
• Do not guess parameter names, get accurate parameter names and formats from documentation

Related Skills

Other UpKuaJing skills you might find useful:

• customs-overview-summary — Query trade overview summary (aggregated)
• customs-overview-trade-list — Query country trade list with paginated breakdown
• customs-overview-trend — Query import/export trade trends by month
• customs-overview-us-import — Query US import transaction statistics
• customs-overview-date — Query date reference information
• customs-company-stats — Query company basic trade statistics
• customs-company-trends — Query company trade trends (monthly breakdown)
• customs-company-partner-stats — Query company trade partner distribution
• customs-company-area-stats — Query company trade area statistics (aggregated)
• upkuajing-customs-trade-company-search — Search customs trade companies