Craigslist Search API

Please help me write a data collection script with the EveryInfra Craigslist Search endpoint (craigslist/search).

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 craigslist and action to search, and put the parameters inside params.
- Required parameters:
  - keyword: Specifies the search term for Craigslist classifieds, such as bicycle. The resulting listings depend on the selected category, allowing the same term to query sales, housing, or jobs.
- Optional parameters:
  - category: Specifies the listing category slug: for_sale (default), cars_trucks, electronics, furniture, housing_apartments_houses, housing_rooms_shares, housing_sublets_temporary, jobs, gigs, resumes, services, community, or event… (allowed: cars_trucks / community / electronics / events / for_sale / furniture / gigs / housing_apartments_houses)
  - country: Selects the target city subdomain rather than a country code. Accepts values listed in the schema, such as newyork, sfbay, or toronto. When provided, overrides subdomain selections made by region or location. (allowed: anchorage / atlanta / austin / baltimore / boston / calgary / charlotte / chicago)
  - location: Acts as a fallback input for region, evaluated only when region is omitted. Maps to a Craigslist city subdomain, not street addresses, zip codes, or geographic coordinates.
  - max_price: Sets the maximum listing price for the selected city subdomain and category. Used alongside min_price, with currency and billing cycles determined by individual listings.
  - min_price: Sets the minimum listing price for the selected city subdomain and category. Does not represent API request costs, and price meanings vary across categories (such as resale items versus housing rent).
  - region: Specifies the city subdomain slug, such as newyork, sfbay, or toronto. Accepts exact list values or common aliases like nyc, la, dc, and sanfrancisco. Unrecognized inputs fall back to newyork.
  - sort: Sorts results by post date (newest), ascending price (price_asc), or relevance (relevance), defaulting to post date if omitted. Does not sort by seller reputation or transaction volume. (allowed: newest / price_asc / relevance)
  - 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, title, text, price, currency, category, location, posted_at, lat, lng, emails; 14 fields in total, full list at https://api.everyinfra.com/api/v1/social/catalog?platform=craigslist.
- Example request body:
{
  "platform": "craigslist",
  "action": "search",
  "params": {
    "keyword": "bicycle"
  }
}
- 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.