mcp-use v2 released: fully embraces stateless protocol with 27% throughput boost
Puzzleheaded_Mine392 · reddit · 2026-08-07
Open-source TypeScript MCP framework mcp-use released v2, rewritten from scratch to support the latest stateless MCP spec (2026-07-28).
Significant Performance Gains:
- Throughput +27% (up to 10,982 ops/sec)
- Cold launch 2.2x faster (down to 68.1 ms)
- Install size 82% smaller (down to 74.4 MiB)
Core Architectural Changes:
- Sessions removed; every request carries its own protocol version and identity.
- Multi round-trip requests allow mid-call disconnects and user confirmations without a live connection.
- Header-based routing enables easier parsing for gateways and WAFs.
Developer Experience: Built-in HMR, MCP Inspector, and a headless screenshot mode for coding agents to debug UIs. Offers drop-in Next.js integration and maintains backward compatibility with 90% of v1 MCP servers.
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