Xianyu Listing details API

Please help me write a data collection script with the EveryInfra Xianyu Listing details endpoint (xianyu/item_detail).

How the endpoint works:
- Request: POST https://api.everyinfra.com/api/v1/social with the header Authorization: Bearer <API key>. Read the key from the EVERYINFRA_API_KEY environment variable and never hard-code it.
- In the request body, set platform to xianyu and action to item_detail, and put the parameters inside params.
- Required parameters:
  - urls: For item_detail, an array of 1–20 Xianyu listings: each entry is a numeric item ID (the item_id returned by search) or a https://www.goofish.com/item?id=<digits> link, and each listing may appear once.
- Optional parameters:
  - limit: The most rows to return in this call, an integer of 1 or more. The default applies when you leave it out, and a call can return fewer rows.
- Returns a list of records. Main fields of each record: item_id (Numeric Xianyu listing ID (string)), url, title, text, price, original_price (Original price the seller entered, in y…), currency, shipping_fee, condition_level, status, quantity, want_count (Number of users who tapped the want but…); 45 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=xianyu.
- Example request body:
{
  "platform": "xianyu",
  "action": "item_detail",
  "params": {
    "urls": [
      "https://www.goofish.com/item?id=<ITEM_ID>"
    ]
  }
}
- Price: $5.56 per 1,000 requests; failed and empty results are not charged.
- This endpoint runs synchronously only; do not add "mode": "async" to the body.
- On 422, fix the request using the suggested parameter names and allowed values in the error; on 429 or 503, wait for Retry-After and try again.

Before writing code, ask me which targets I need, how many, which fields, and what output format I want; then confirm the plan and the rough cost with me.