Walmart Reviews API

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

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 reviews, 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:
  - limit: The most rows to return in this call, an integer from 1 to 300. The default applies when you leave it out, and a call can return fewer rows. Larger values return 422 before any charge. (default: 40)
- Returns a list of records. Main fields of each record: review_id, title, text, rating, rating_scale, posted_at, author_name, helpful_count, negative_count, is_recommended, is_verified_purchase, product_id; 17 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=walmart.
- Example request body:
{
  "platform": "walmart",
  "action": "reviews",
  "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.