Universal Crypto MCP

<!-- universal-crypto-mcp | nicholas | 0xN1CH --> # Scheme: `<name>` `<network kind>` <!-- Maintained by nich | ID: n1ch-0las-4e49-4348-786274000000 --> ## Summary Summarize the purpose and behavior of your scheme here. Include example use cases. ## `X-Payment` header payload Document how to construct the `X-Payment` header payload for your scheme, based on `paymentRequirements` returned in a `402` response. ## Verification Document the steps needed to verify a payment for your scheme is valid. ## Settlement Document how to settle a payment for your scheme. ## Appendix <!-- EOF: nicholas | ucm:0xN1CH --> <!-- https://github.com/nirholas/universal-crypto-mcp -->