AI search is where buyers now ask what's a good tool for X — and whether your product shows up in that answer is the new SEO. The problem: the platforms measuring this charge $29-489/month, treat extra languages as paid add-ons, and you never own the raw data. This kit is the measurement loop in files you own: 50 audit questions (English + localized German and Japanese packs), a single-file Python runner that calls the official OpenAI API and the official Perplexity Agent API with your own keys, pinned model versions recorded on every answer, and identical CSV output for both engines - mention, position, citations, sentiment. Turn the run into a one-page scorecard with four verdicts, benchmark against the rivals the same audit surfaced, and pick one fix from the playbook - 45 minutes a month keeps the loop running. A full audit (50 prompts x 2 engines) typically costs well under $1 of your own API credit. $99 one-time, no subscription.