LinkedIn Comments API

Please help me write a data collection script with the EveryInfra LinkedIn Comments endpoint (linkedin/comments).

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 linkedin and action to comments, and put the parameters inside params.
- Required parameters:
  - url: Specifies the full LinkedIn post URL used by the comments action to fetch comments for that post; company or personal profile URLs are not supported.
- Optional parameters:
  - num_comments: Provides a compatibility input for setting an upper cap on fetched comments rather than filtering for a minimum comment count. Results are not guaranteed to be truncated to this number.
  - num_likes: Provides a compatibility input for setting an upper cap on retrieved like data rather than filtering posts by a minimum number of likes. It does not serve as a stable post popularity filter.
  - sort: Sets the sorting order to newest or relevance for post search and comment fetching. Because these actions target different object types, this parameter does not sort people, companies, or job listings. (allowed: newest / relevance)
  - limit: The most rows to return in this call, an integer from 1 to 200. The default applies when you leave it out, and a call can return fewer rows. Larger values return 422 before any charge. (default: 20)
- Returns a list of records. Main fields of each record: id, text, url, author_name, author_username, author_headline, author_url (Profile link of the post author (search…), like_count, reply_count, is_pinned, is_edited, posted_at; 14 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=linkedin.
- Example request body:
{
  "platform": "linkedin",
  "action": "comments",
  "params": {
    "url": "https://www.linkedin.com/posts/linkedin_no-is-a-complete-sentence-activity-7247998907798978560-J_hB"
  }
}
- Price: $0.56 per 1,000 requests; failed and empty results are not charged.
- This endpoint is asynchronous by default: it returns 202 and a job_id, then you poll GET https://api.everyinfra.com/api/v1/jobs/{job_id} until the status is succeeded or failed.
- 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.