Lanjing Mercado Libre Product Selection

This skill queries Mercado Libre product, catalog, keyword, category, trend, seller, review, exchange-rate, and plan-usage data through the LinkFox gateway. The gateway exposes one unified route,

POST /lingdong/call

, and the skill selects one of 24 supported

toolName

values with matching

arguments

Core Concepts

Call only
```
${LINKFOX_TOOL_GATEWAY}/lingdong/call
```
. Do not call the upstream Lanjing XP-MCP server directly, and do not ask the user for upstream
```
secret-key
```
/
```
X-API-Key
```
— upstream credentials are owned by the backend.
The request body is always
```
{"toolName":"...","arguments":{...}}
```
. The script takes this whole object as a single JSON argument.

Field names inside

arguments

must match

references/lanjing-mercado-tool-reference.md

exactly, including camelCase names such as

siteId

itemId

productId

categoryId

runDate

runMonth

pageNo

pageSize

Read
```
data
```
first when presenting results. Read
```
contentText
```
when
```
data
```
is text or ambiguous. Show
```
rawResponse
```
only when the user asks for raw diagnostics.
Paid tools currently cost
```
16000
```
tokens per call; free tools cost
```
0
```
. Trust the backend
```
costToken
```
field.

Reference Files

```
references/api.md
```
: LinkFox gateway contract, request/response structure, error codes, curl example, and Feedback API.
```
references/lanjing-mercado-tool-reference.md
```
: detailed Chinese reference for the 24 Mercado Libre tools — parameters, site IDs, pagination, sorting, and billing status.

Tool Selection

User intent	Use these tools
Product detail, product sales history, product search	`itemInfo` , `itemHistory` , `itemSearch`
Catalog/product page detail, catalog sales history, catalog search	`catalogInfo` , `catalogHistory` , `catalogSearch`
Daily/monthly hot keywords and reverse traffic keywords	`keywordDateSearch` , `keywordMonthSearch` , `keywordReverse`
Category lookup before paid analysis	`categorySearch` , `categorySmallSearch`
Category brand, item, seller, new item, price, sales, sold-history, statistics, warehouse distribution	`trendBrandTopBrand` , `trendBrandTopItem` , `trendBrandTopSeller` , `trendNewItems` , `trendPrice` , `trendSale` , `trendSoldHis` , `trendStatistical` , `trendStoreInventoryType`
Seller search	`sellerSearch`
Product reviews	`reviewSearch`
Exchange rate and package usage	`rateInfo` , `myUsage`

Free tools:

categorySearch

categorySmallSearch

reviewSearch

rateInfo

myUsage

. All others are paid.

Parameter Guide

```
toolName
```
(string, required): one of the 24 tools above.
```
arguments
```
(object, required): the tool's parameter object. Must be a JSON object, not an array/string/number. The backend strips
```
uId
```
/
```
uid
```
/
```
memberId
```
and trims empty values.
Sites:
```
MLM
```
(Mexico),
```
MLB
```
(Brazil),
```
MLA
```
(Argentina),
```
MLC
```
(Chile),
```
MCO
```
(Colombia — only for tools whose reference explicitly lists it).
When the user gives a category name instead of a
```
categoryId
```
, call
```
categorySearch
```
or
```
categorySmallSearch
```
first, then use the returned category ID for paid trend/product/catalog tools.
```
reviewSearch
```
takes
```
itemId
```
only (no
```
siteId
```
).
```
myUsage
```
takes
```
{}
```
.
For broad research questions, narrow paid calls with site, category, keyword, date/month, pagination, price, sales, or sorting filters. Avoid exploratory paid calls not anchored to the user's goal.

调用方式

API 端点：
```
POST /lingdong/call
```
（完整参数/响应/错误码见
```
references/api.md
```
）

Python 脚本：

python scripts/linkfox_lanjing_mercado_product_selection.py '<JSON 参数>' [--inline]

成本约束：本工具会消耗积分；同一会话同一参数组合默认只调用一次，脚本带 24h 本地缓存。失败/空结果不得自动换关键词、翻页或改邮编连续试探；需要继续检索时先向用户说明会产生额外消耗。

输出策略（脚本默认行为）：

始终将完整响应写入
```
<cwd>/linkfox/<YYYY-MM-DD>/<session>/data/linkfox-lanjing-mercado-product-selection-<timestamp>.json
```
（
```
<cwd>
```
为脚本执行时的工作目录，在 Claude Code 里即当前项目目录；
```
<session>
```
取自环境变量
```
SESSION_ID
```
，按用户任务自动聚合；禁止写入 /tmp，当前目录不可写则报错）
响应体 ≤ 8 KB：落盘后把完整 JSON 打印到 stdout
响应体 > 8 KB：落盘后 stdout 只输出摘要（顶层字段、常见计数如
```
total
```
/
```
costToken
```
、最大列表字段的长度 + 前 3 条样本）
加
```
--inline
```
强制全量打印到 stdout（同样落盘）

读数据建议：先看摘要判断是否足够；需要具体字段时优先用

jq

或

ConvertFrom-Json

从保存的 json 文件按需抽取，避免整份 JSON 进入上下文。

解决认证和积分问题

发生以下异常情况时，采用 references/onboarding.md 引导解决问题：

异常情况

未配置API Key：环境变量未配置
```
LINKFOX_AGENT_API_KEY
```
，也未配置
```
LINKFOXAGENT_API_KEY
```
。
响应401或402状态码
响应提示积分或余额不足：消息含"积分余额不足/计费不足/余额不足/quota exceeded/insufficient balance/套餐到期/需充值/请充值"，或类似含义的内容。

Usage Examples

The single JSON argument is the full payload

{"toolName":...,"arguments":{...}}

bash

# Free: search Mexico categories by name
python scripts/linkfox_lanjing_mercado_product_selection.py '{"toolName":"categorySearch","arguments":{"siteId":"MLM","searchText":"Auriculares"}}'

# Paid: product detail for a real MLM item
python scripts/linkfox_lanjing_mercado_product_selection.py '{"toolName":"itemInfo","arguments":{"siteId":"MLM","itemId":"MLM4979447466"}}'

# Free: my plan usage (no arguments)
python scripts/linkfox_lanjing_mercado_product_selection.py '{"toolName":"myUsage","arguments":{}}'

# Paid: monthly hot keywords for Brazil, 2026-06
python scripts/linkfox_lanjing_mercado_product_selection.py '{"toolName":"keywordMonthSearch","arguments":{"siteId":"MLB","runMonth":"202606"}}'

On PowerShell, wrap the JSON in single quotes the same way; if quoting is troublesome, write the payload to a file and pass it via

--inline

after loading, or use

ConvertTo-Json

to build the argument.

Display Rules

Present the returned data clearly without inventing unsupported business conclusions.
Preserve the meaning and important field names from results; translate labels only when it improves readability.
For large arrays or time series, summarize the visible slice and read only needed fields from the persisted JSON file.
For "no data" or business-level failure messages, explain that the upstream Mercado data provider returned that result; do not label it as a system outage unless the wrapper response contains an actual error.
Never expose internal LinkFox API keys, upstream secrets, or full sensitive raw payloads in user-facing output.

Important Limitations

The LinkFox route is a unified backend gateway; the skill does not publish separate HTTP endpoints for each
```
toolName
```
.
Required-field validation happens in the backend and is also documented in
```
references/lanjing-mercado-tool-reference.md
```
.
Paid tools charge per backend invocation, even if the upstream business result is empty.
Response shapes vary by tool. Most tools return business results as text in
```
data
```
; use real responses and
```
references/api.md
```
as the source of truth instead of forcing a single table schema.

User Expression & Scenario Quick Reference

User says	Likely action
"查这个美客多商品", "商品详情", "销量历史"	Use `itemInfo` or `itemHistory`
"搜墨西哥站耳机", "筛选商品"	Use `itemSearch` ; use `categorySearch` first if only category text is known
"官链", "catalog", "目录链接"	Use a `catalog*` tool
"关键词热搜", "月度词", "流量词反查"	Use `keywordDateSearch` , `keywordMonthSearch` , or `keywordReverse`
"类目趋势", "新品机会", "销量分布", "品牌排行"	Resolve `categoryId` , then use a `trend*` tool
"店铺", "seller"	Use `sellerSearch`
"评论", "reviews"	Use `reviewSearch`
"汇率", "套餐用量"	Use `rateInfo` or `myUsage`

积分消耗规则

消耗 12 积分。

用户会因积分消耗而支付费用。请充分评估：当需要高频调用本技能，或用户对积分消耗量预期不足时，务必提醒用户，由用户决定是否继续。

Feedback

Auto-detect and report feedback via the Feedback API when the skill behavior, documentation, or result presentation does not match the user's intent, when the user expresses praise or dissatisfaction, or when a concrete improvement is visible. Follow

references/api.md

; do not interrupt the user's task and do not report secrets, private data, or complete large responses.

For more high-quality, professional cross-border e-commerce skills, visit LinkFox Skills.

linkfox-lanjing-mercado-product-selection

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