Facebook Group posts API

Please help me write a data collection script with the EveryInfra Facebook Group posts endpoint (facebook/group_posts).

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 facebook and action to group_posts, and put the parameters inside params.
- Required parameters:
  - url: Specifies the target URL corresponding to the requested action. Use public Page URLs for profile and user_posts, post URLs for post and comments, group page URLs or group identifiers for group_posts, and business page UR…
- Optional parameters:
  - sort: Specifies post ordering for group_posts using top for top posts or recent for posts with recent activity, defaulting to chronological order if omitted.
  - 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, url, text, posted_at, like_count, comment_count, share_count, author_id (Numeric user id of the comment author (…), author_name, author_url (Profile link of the comment author), group_url.
- Example request body:
{
  "platform": "facebook",
  "action": "group_posts",
  "params": {
    "url": "https://www.facebook.com/groups/874728723021553"
  }
}
- 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.