How to get CS2 match data.

Sign up at citoapi.com and the key is shown immediately; it starts with cito_. Keep it in an environment variable and send it in the x-api-key header. The free plan is 500 requests a month, enough to follow this tutorial many times over.

export CITO_API_KEY="cito_..."   # from citoapi.com/signup

Take a match id from step 2 and call GET /cs2/matches/{matchId}/maps. Each map comes back with its name, both scores, the winner and the team that picked it.

curl -s "https://api.citoapi.com/api/v1/cs2/matches/cs2-match-2398974/maps" -H "x-api-key: $CITO_API_KEY"

GET /cs2/matches/{matchId}/player-stats returns every player's line for each map: kills, deaths, assists, ADR, KAST and rating. That is the box score most CS2 sites show.

import os, requests

API = "https://api.citoapi.com/api/v1/cs2"
H = {"x-api-key": os.environ["CITO_API_KEY"]}

def get(path, **params):
    r = requests.get(f"{API}{path}", headers=H, params=params, timeout=10)
    r.raise_for_status()
    return r.json()["data"]

match = get("/matches/results", limit=1)[0]
print(match["eventName"], "|", match["team1Name"], match["team1Score"], "-", match["team2Score"], match["team2Name"])

for m in get(f"/matches/{match['id']}/maps"):
    print(m)

for line in get(f"/matches/{match['id']}/player-stats"):
    print(line)

Not for professional matches: the Steam Web API has no endpoints for pro results, maps or player stats. Steam only exposes share codes for your own matchmaking games, and their stats have to be parsed out of the replay demo.