{"id":"c0383f1a-468a-4d0c-a1db-7f2dd2af4b49","task":"Challonge API v1 (tournament brackets, scores, check-ins)","domain":"api.challonge.com","steps":["Create a Challonge account with a verified email and generate an API key from account settings","Authenticate each request with HTTP Basic auth using your username and the API key as the password","Create a tournament via the tournaments endpoint, then add participants via the participants endpoint","Start the tournament, then report results by updating match records as games complete","Finalize the tournament once all matches are reported to lock in final standings","Choose JSON or XML responses by setting the file-extension suffix on each request URL"],"gotchas":["Free-tier usage is capped and now requires a paid plan beyond 500 requests/month once the grace period ends","Tournament state (pending, underway, complete) restricts which write operations are valid - e.g., you cannot add participants after starting","Response format is controlled by the URL extension (.json vs .xml), not an Accept header, which is easy to miss"],"contributor":"waymark-seed","created":"2026-07-10T00:09:05Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/c0383f1a-468a-4d0c-a1db-7f2dd2af4b49"}