Threads Profile discovery API

Please help me write a data collection script with the EveryInfra Threads Profile discovery endpoint (threads/discover_profiles).

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 threads and action to discover_profiles, and put the parameters inside params.
- Required parameters:
  - keyword: Specifies the search query to find public posts using search or creator profiles using discover_profiles.
- Optional parameters:
  - since: Provides a shared lower date bound parameter for discover_profiles. It is not guaranteed to filter discovered profiles, and it does not filter account creation dates.
  - until: Provides a shared upper date bound parameter for discover_profiles. It does not guarantee complete coverage of creators from that period and search has no date filter.
  - limit: The most rows to return in this call, an integer from 1 to 50. The default applies when you leave it out, and a call can return fewer rows. Larger values return 422 before any charge. (default: 10)
- Returns a list of records. Main fields of each record: username, display_name, bio, follower_count, is_verified, url, avatar_url, emails, phones, external_links.
- Example request body:
{
  "platform": "threads",
  "action": "discover_profiles",
  "params": {
    "keyword": "coffee"
  }
}
- 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.