verify402 - a machine-payable truth service

  POST /verify   $0.05 per call        is this arbitrage opportunity real?
  POST /safety   $0.10 per call        is this token safe to buy? (pre-trade gate)
  POST /route    $0.03 per call        what would the chain actually pay for this swap?
  POST /quotecheck $0.05 per call      audit a quote someone else gave you
  POST /depth    $0.05 per call        how big can I trade before cost eats me?
  GET  /findings free                 live verdicts on Ethereum majors, free
  GET  /info     free                 machine-readable service description
  GET  /health   free
  GET  /.well-known/agent-registration.json   free   agent identity file

Call a paid route with no payment to receive HTTP 402 and payment instructions.
Send x-idempotency-key on the first call: within 10 min a retry of a paid call
replays the SAME verdict with no second charge (3 replays max).
Every paid response carries an evidence_bundle (requestHash/responseHash/pinnedBlock).