Walmart Details API

Please help me write a data collection script with the EveryInfra Walmart Details endpoint (walmart/profile).

Endpoint contract:
- 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 walmart and action to profile, and put the parameters inside params.
- Required parameters:
  - url: Specifies the full walmart.com/ip/ product URL for the profile, reviews, and product_detail actions.
- Optional parameters:
  - lang: Sets the display language for the search and profile actions. Allowed values are en (English, default) and fr (French). This parameter changes only the interface language, not the storefront region or review filtering. (allowed: en / fr)
- Returns one object. Main fields: item_id, name, url, brand, price, was_price, currency, rating, rating_scale, review_count, in_stock, availability; 23 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=walmart.
- Example request body:
{
  "platform": "walmart",
  "action": "profile",
  "params": {
    "url": "https://www.walmart.com/ip/Apple-AirPods-Pro-2nd-Generation/1752657021"
  }
}
- Price: $1.39 per 1,000 requests; failed and empty results are not charged.
- For dozens or hundreds of targets, add "mode": "async" to the body: you get a job_id at once and poll GET https://api.everyinfra.com/api/v1/jobs/{job_id} for the result.
- 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.