Custom-weight rerank of every covered coin (paid, $0.05, x402 or MPP)

Custom-weight rerank of every cryptocurrency covered by True Value Rankings: the full TVR table recomputed with the caller's own weights for the 8 fundamental metrics, using TVR's non-public score transformation. $0.05 per call, paid in-band with x402 (USDC on Base) or MPP (USDC.e on Tempo, tempo charge, push mode). Educational model output, not a recommendation. Flow: POST without payment returns 402 with the challenge headers; pay exactly 50000 units (USDC on Base through x402, EIP-3009 authorization signed for the payTo address, or USDC.e on Tempo through MPP, push mode) and retry the same request with the payment header; the response is 200 with the ranking and a receipt header. Invalid input is refused with 400 before any payment. A lost response is re-delivered on the same proof for 24 hours without a second charge; the same proof with different inputs is refused with 409. The live x402 offer, field for field, is at https://truevaluerankings.com/.well-known/x402.json. Free alternative: the four built-in presets through POST /api/calculate-batch. MCP tool: get_custom_ranking. A GET on this path returns the same x402 challenge (PAYMENT-REQUIRED header) as a quote, never a sale, and carries no MPP challenge; a POST with no body is answered the same way. Premium subscribers send their agent key as Authorization: Bearer tvr_k_... instead of a payment (one counted Premium operation; 200 directly, no 402).