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 * **[MCP Plexus](https://github.com/Super-I-Tech/mcp_plexus)**: A secure, **multi-tenant** and Multi-user MCP python server framework built to integrate easily with external services via OAuth 2.1, offering scalable and robust solutions for managing complex AI applications.
 * **[mcp_sse (Elixir)](https://github.com/kEND/mcp_sse)** An SSE implementation in Elixir for rapidly creating MCP servers.
 * **[mxcp](https://github.com/raw-labs/mxcp)** (Python) - Open-source framework for building enterprise-grade MCP servers using just YAML, SQL, and Python, with built-in auth, monitoring, ETL and policy enforcement.
+* **[M2M Sentinel](https://github.com/AntoineSakkalis/M2M-Sentinel)** (TypeScript & Python) - Fast smart contract bytecode analysis, EIP-1967/UUPS proxy detection, and token capability observations on Base Mainnet. Supports dual stdio and streamable HTTP/SSE transports for MCP agents. [npm](https://www.npmjs.com/package/m2m-sentinel-sdk) · [PyPI](https://pypi.org/project/m2m-sentinel/) · [Live Server](https://m2msentinel.vercel.app)
 * **[Next.js MCP Server Template](https://github.com/vercel-labs/mcp-for-next.js)** (Typescript) - A starter Next.js project that uses the MCP Adapter to allow MCP clients to connect and access resources.
 * **[PayMCP](https://github.com/blustAI/paymcp)** (Python & TypeScript) - Lightweight payments layer for MCP servers: turn tools into paid endpoints with a two-line decorator. [PyPI](https://pypi.org/project/paymcp/) · [npm](https://www.npmjs.com/package/paymcp) · [TS repo](https://github.com/blustAI/paymcp-ts)
 * **[Perl SDK](https://github.com/mojolicious/mojo-mcp)** - An SDK for building MCP servers and clients with the Perl programming language.