AI-grade a trading card image using a 3-stage pipeline:
(1) Qwen Vision LLM analyzes corners, edges, surface defects
(2) OpenCV measures exact centering ratios programmatically
(3) BGS professional capping algorithm adjusts the final grade
Returns PSA/Beckett-calibrated subgrades and an overall condition score.
Also includes a free ROI verdict (should you grade this card?).
PAID: $0.10 per call via x402. THREE rails are accepted, not just Base:
- USDC on Base (eip155:8453)
- USDC on Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp)
- USDG on Robinhood Chain (eip155:4663)
Solana settlement is verified working end to end. (Audit 2026-07-30, BUG-12.)
Use this when: a user has a card image and wants to know what grade
it would receive from PSA or Beckett.