Is the Skyscanner API free? Fares without a partner key

export TOOLZERHUB_API_KEY=your_key
curl -H "x-api-key: $TOOLZERHUB_API_KEY" \
  "https://api.toolzerhub.com/v1/skyscanner/route?origin=lond&destination=nyca"

{
  "price": 210,
  "formatted_price": "£210",
  "direct": false,
  "legs": [
    {
      "date": "2026-11-23",
      "quoted_at": "2026-10-21T20:14Z",
      "origin": { "sky_code": "LGW", "name": "London Gatwick" },
      "destination": { "sky_code": "JFK", "name": "New York John F. Kennedy" },
      "carrier_name": "Ryanair"
    }
  ],
  "deep_link_path": "/transport/flights/LGW/JFK/20261123?locale=en-GB&market=UK&currency=GBP"
}

import csv
import os
import sys
import time
from datetime import datetime, timezone

import requests

URL = "https://api.toolzerhub.com/v1/skyscanner/route"
HEADERS = {"x-api-key": os.environ.get("TOOLZERHUB_API_KEY", "")}
FIELDS = ["fetched_at", "origin", "destination", "date", "price", "currency", "direct",
          "carrier", "quoted_at", "age_hours", "link"]


def route(origin, destination, tries=3):
    # 429, 5xx and dropped connections are retried; failed calls cost no credits.
    params = {"origin": origin, "destination": destination}
    for attempt in range(tries):
        last = attempt == tries - 1
        try:
            r = requests.get(URL, headers=HEADERS, params=params, timeout=90)
        except requests.RequestException:
            if last:
                raise
            time.sleep(10 * (attempt + 1))
            continue
        if r.status_code in (429, 500, 502, 503, 504) and not last:
            time.sleep(10 * (attempt + 1))
            continue
        r.raise_for_status()
        return r.json()["data"]


def age_hours(quoted_at, now):
    quoted = datetime.strptime(quoted_at, "%Y-%m-%dT%H:%MZ").replace(tzinfo=timezone.utc)
    return round((now - quoted).total_seconds() / 3600, 1)


def main(routes, out="fares.csv"):
    now = datetime.now(timezone.utc)
    new_file = not os.path.exists(out)
    with open(out, "a", newline="", encoding="utf-8-sig" if new_file else "utf-8") as f:
        writer = csv.DictWriter(f, fieldnames=FIELDS)
        if new_file:
            writer.writeheader()
        for pair in filter(None, (p.strip() for p in routes.split(","))):
            origin, _, destination = pair.partition("-")
            try:
                data = route(origin, destination)
            except requests.RequestException as e:  # e.g. a malformed code; go on to the next
                print(f"{pair}: {e}")
                continue
            if data is None:  # an unknown code, or no Skyscanner page for the pair
                print(f"{pair}: no fares")
                continue
            for deal in data["deals"]:
                leg = deal["legs"][0]  # one leg on route pages: one-way quotes
                writer.writerow({
                    "fetched_at": now.strftime("%Y-%m-%dT%H:%MZ"),
                    "origin": leg["origin"]["sky_code"],
                    "destination": leg["destination"]["sky_code"],
                    "date": leg["date"], "price": deal["price"], "currency": data["currency"],
                    "direct": deal["direct"], "carrier": leg.get("carrier_name"),
                    "quoted_at": leg["quoted_at"], "age_hours": age_hours(leg["quoted_at"], now),
                    "link": "https://www.skyscanner.net" + deal["deep_link_path"],
                })
            by_month = data.get("cheapest_by_month") or []
            months = ", ".join(f"{m['month']} {m['price']}" for m in by_month)
            print(f"{pair}: {len(data['deals'])} quotes, cheapest {data['cheapest_price']} "
                  f"{data['currency']}; by month: {months}")


if __name__ == "__main__":
    if len(sys.argv) < 2:
        sys.exit('usage: python skyscanner_fares.py "lond-nyca,ber-bcn" [file.csv]')
    if not HEADERS["x-api-key"]:
        sys.exit("set TOOLZERHUB_API_KEY first")
    main(*sys.argv[1:])