150 MCP Servers Never Started. No Benchmark Shows That.
An unrepaired probability sample of 400 MCP servers found only 48.8% complete an initialize handshake, and 37.5% never start at all. Meanwhile 68.8% of BFCL v4's extracted tool definitions and 85.6% of UltraTool's are exact repeats, against 0.4% for real MCP tools.
September 12, 2026 · 11 min read