CourtListener / One case (opinion cluster): citations, judges, dates

One case (opinion cluster): citations, judges, dates by its CourtListener id, from REST v4 /clusters/{id}/. An unknown id is a miss ($0). Runs on your own CourtListener API token (Connections, Add key, CourtListener; your token is on your CourtListener profile page). looot charges $0; Free Law Project sets your limits (free accounts: 5 per minute, 50 per hour, 125 per day). Free membership tokens may not power a revenue-positive product; commercial use needs your own agreement with Free Law Project.