{"endpoint":"/evaluate","method":"POST","description":"Per-claim verification with confidence scoring. Tiered, FEVER-calibrated.","request_body":{"content":"string OR object — the claim or content to verify","url":"string — optional, fetch and verify content at this URL","source":"optional — 'exa' | 'sonar' (default: tiered fallback)","min_confidence":"optional — 0.0–1.0 (default: 0.5)"},"example":{"content":"Bitcoin is currently trading around $80,000","min_confidence":0.7},"pricing":"$0.01 USDC per call (x402 gated). $0 if cached.","note":"Use POST with one of {content, url} required. GET returns this doc."}