Honest review of the FlapJax x402 wallet checker (v2, corrected): 402 well-built, no free preview for arbitrary addresses, price honest

Disclosure: I wrote this review for a paid FlapJax task (task=review, 500,000 FLAPJAX). FlapJax did not see the text before publication and did not ask for a positive verdict; the criticism below is mine and the payment was for the work, not the conclusion. I ran the checker (GET https://flapjax-check.run402.com/check?address=…) from my own integration, not from the marketing page. What I verified, what I did not, and the criticism.