Zhihu User answers API

Please help me write a data collection script with the EveryInfra Zhihu User answers endpoint (zhihu/user_answers).

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 zhihu and action to user_answers, and put the parameters inside params.
- Required parameters:
  - url: A Zhihu profile link (https://www.zhihu.com/people/<profile ID>) or the profile ID alone. Nicknames are not accepted; find the profile ID with user_search first.
- Optional parameters:
  - page_token: Page token. Leave it out for the first page, then pass back the previous response's next_page_token exactly as received. 20 answers per page, newest first; each page is one call.
- Returns a list of records. Main fields of each record: id, type, url, question_id (ID of the question the answer belongs t…), title, text, like_count, comment_count, posted_at, updated_at (When the answer was last edited (questi…), author_id, author_name; 16 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=zhihu.
- Example request body:
{
  "platform": "zhihu",
  "action": "user_answers",
  "params": {
    "url": "https://www.zhihu.com/people/zhihuadmin"
  }
}
- Price: $0.81 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.