Chain metadata: chainId, latest block, gas price and finality across 5 EVM chains. Deterministic, Ed25519-signed. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure. $0.001 USDC via x402 on Base. SYNTHORA.
Prices and medians update for the tier you select.
Ranked by how closely each one matches Chain metadata's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.