{"endpoint":"/api/kyb/followup","method":"POST","description":"Follow-Up Message Generator — personality-calibrated follow-up with timing and channel recommendation","price":"$1.50 via x402 (USDC on Base or Solana)","product":"KYB (Know Your Buyer)","modes":{"precision":"Include kyh_profile for personality-precision follow-up (Mode 1)","inferred":"Without kyh_profile, use partial_data or buyer_description for directional estimates (Mode 2)"},"input":{"product":"Required — what you're selling","last_interaction":"Required — what was discussed last","days_since":"Required — days since last contact","interaction_count":"Required — how many prior interactions","previous_outcome":"Optional — what happened last time","channel":"Optional — email, chat, linkedin, or phone","kyh_profile":"Optional — full KYH personality portrait","partial_data":"Optional — partial personality data","buyer_description":"Optional — text description of the buyer"},"output":"message (ready to send) + subject_line + timing + channel_recommendation + tone_strategy + escalation_path"}