"Mix" matching MCP servers:

Model Context Protocol (MCP) server for Mexican Electronic Invoicing (CFDI 4.0, Complemento de Pagos 2.0). Provide tools to validate, generate, and explore API specifications for SAT/PAC interoperability.

Enables validating and querying SPEI transfers through 66 public M2M operations, with configurable profiles and risk controls.

Fully autonomous, crypto-monetized MCP server on the Base network. Provides premium smart contract auditing, patching, and token data arbitrage using the x402 micro-transaction protocol.

Enables AI agents to generate static Pix QR codes for Brazilian payments using natural language, with EMV 4.0 compliance and no external API required.

Enables querying and, when explicitly enabled, creating Pix charges through a local stdio server with SQLite-backed idempotency and audit.