Douyin Xingtu creator analytics API

Please help me write a data collection script with the EveryInfra Douyin Xingtu creator analytics endpoint (douyin/xingtu_creator_analytics).

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 douyin and action to xingtu_creator_analytics, and put the parameters inside params.
- Required parameters:
  - douyin_id: The visible Douyin account ID (unique_id) returned by the ordinary creator_search action and required by xingtu_creator_analytics and xingtu_rate_card; xingtu_creator_search does not return it.
- Returns one object. Main fields: creator_id, creator_type, follower_count, average_play_count, city, province, gender (Gender as shown on the account), category_id, content_themes, tags, creator_grade, is_xingtu_creator; 14 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=douyin.
- Example request body:
{
  "platform": "douyin",
  "action": "xingtu_creator_analytics",
  "params": {
    "douyin_id": "XiaoZhenlla"
  }
}
- 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.