Harper Hobbies
PSA ARBITRAGE RESEARCH
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Harper Hobbies

PSA Arbitrage Research
Settings
Cloudflare Worker URL
Paste the URL of your deployed cloudflare-worker.js here. The worker keeps your Anthropic API key secure server-side.
ROI Thresholds (fixed)
BUY ≥ 3×  ·  MARGINAL 2–3×  ·  LOW RETURN < 2×
Default PSA Tier
Shipping Cost
$
About
Category lists are discovered dynamically by Claude using live market data.

Each category refresh = 1 discovery + N pricing calls. Results are cached in shared Cloudflare KV storage — available to all users indefinitely until the ↻ Refresh button is pressed. Watchlisted cards are always preserved across refreshes.