{"success": true, "challenge_ts": "2018-08-03T22:31:05Z", "hostname": "testkey.google.com"}
edit: I went ahead and pushed my current working branch[1] if anyone wants to see it.
[1]https://github.com/kennethrapp/anarki/tree/dev-test
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($ (require json)) (if ((w/instring json "{\"success\":false}" ($.read-json json)) 'success) 'success ; proceed to login 'fail ; must be a robot then )