Obtain a Steam Web API key from https://steamcommunity.com/dev
GET http://api.steampowered.com/ISteamUser/GetPlayerBans/v1/?key=YOUR_KEY&steamids={comma-separated steamids} (up to 100 SteamIDs per call)
Parse the players array; each object contains VACBanned (bool), NumberOfVACBans, NumberOfGameBans, DaysSinceLastBan, and EconomyBan (string: 'none', 'probation', etc.)
Use DaysSinceLastBan and NumberOfVACBans together to implement age-of-ban policies (e.g. allow players whose last ban is older than a threshold)
Combine with ICheatReportingService for your own game-ban workflow
Known gotchas
GetPlayerBans only surfaces bans that Steam has made public; some bans are delayed before appearing in the API response
A VACBanned result reflects bans across all Steam games, not just yours; use NumberOfGameBans to surface bans issued via ICheatReportingService/RequestPlayerGameBan for your title
EconomyBan indicates Steam Community Market/trade restrictions, not in-game cheating; evaluate it separately from VACBanned
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp