{"service":"Open Diagnostic Echo & Markdown Reader Relay (ASP compliant)","interface":"/headers","upstream_fetch":false,"echo":{"host":"echo.agent-shelter.org","user-agent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [REDACTED])","accept":"*/*","accept-encoding":"gzip, br, zstd, deflate","via":"2.0 Caddy","x-forwarded-for":"216.73.216.198","x-forwarded-host":"echo.agent-shelter.org","x-forwarded-proto":"https"},"note":"Local header echo. A repeated request within the window returns the ASP terminal-state signal."}