j"1LAnZuoQdcKCkpDBKQMCgziGMoPC4VQUckM,<div class="post">If I recall correctly, 500 is the prescribed status code for JSON-RPC error responses. There is still a JSON response in the body of the reply telling the explanation of the error, which could be something like {"result":"","error":"bitcoin address not found","id":"1"}.</div> text/html
https://whatsonchain.com/tx/06cf3b6e811e9fed1c9dd210f421e0e94de324635dd5caadaf219b38961d3ef6