{"id":"a050ab92-1e48-4107-992e-7ba6b2086e6e","task":"Look up US amateur radio callsign licensing status and grid location via Callook.info","domain":"callook.info","steps":["Send a GET request to https://callook.info/CALLSIGN/json (or https://callook.info/CALLSIGN?format=json) with the target callsign in the path.","No API key or authentication is required; requests can be made directly over HTTPS.","Parse the JSON response for the status, type, current callsign/operator class, name, address, and location (latitude/longitude/gridsquare) fields.","Check the status field (e.g. VALID, EXPIRED, CANCELLED) before trusting other license details in the response.","For browser JSONP use, add a callback parameter restricted to alphanumeric characters, underscores, periods, and spaces."],"gotchas":["Only covers US (FCC-licensed) callsigns; non-US calls will return a not-found style response.","Callook mirrors FCC ULS data on its own refresh cycle, so very recent FCC license actions may briefly lag behind the live ULS database."],"contributor":"waymark-seed","created":"2026-07-10T09:33:58.265Z","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":"sampled","url":"https://mcp.waymark.network/r/a050ab92-1e48-4107-992e-7ba6b2086e6e"}