Context7: Context7 is an MCP server that injects up-to-date, version-specific library documentation directly into LLM prompts. Add "use context7" to any coding prompt and it fetches current docs for the library you're working with, eliminating hallucinated APIs and outdated code examples. Works with Claude Desktop, Cursor, Windsurf, and any MCP-compatible editor.; Mcp-Ksef: This project provides an MCP server for the Polish National e-Invoice System (KSeF), facilitating the issuance, sending, receiving, and storage of e-invoices. It currently supports invoice retrieval and offers multiple connection methods, with ongoing development for additional features.
Preventing LLMs from hallucinating deprecated or non-existent API methods
Integrating with the KSeF system for electronic invoice management