TikTok Comment replies API

Please help me write a data collection script with the EveryInfra TikTok Comment replies endpoint (tiktok/comment_replies).

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 tiktok and action to comment_replies, and put the parameters inside params.
- Required parameters:
  - url: The TikTok video the comment is on: https://www.tiktok.com/@<user>/video/<ID>, or the video ID.
  - comment_id: The numeric ID of the top-level comment whose replies comment_replies reads: the id of a comments row.
- Optional parameters:
  - page_token: Page token for TikTok list actions such as hashtag_search, user_search, following and shop_products.
- Returns a list of records. Main fields of each record: id, text, like_count, author_username, author_name, author_id, author_url, author_avatar_url, liked_by_author, is_reply, reply_to_id, reply_to_reply_id; 16 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=tiktok.
- Example request body:
{
  "platform": "tiktok",
  "action": "comment_replies",
  "params": {
    "url": "https://www.tiktok.com/@stoolpresidente/video/7488736374602927402",
    "comment_id": "7488930681154781994"
  }
}
- Price: $0.56 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.