passmcp-lsp

A language server for MCP artefacts. It checks server.json, MCP client configurations, MCP tool definitions, and passmcp policies and attestations as you type, and shows passmcp's guidance when you hover a check id. The same checks run from a terminal or CI with passmcp-lsp check.

Page	Covers
Diagnostics	How a file is recognised, and every diagnostic code
Editors	VS Code, Neovim and any other stdio client
Architecture	How a document flows from the editor to a diagnostic
Comparison	passmcp-lsp beside the other ways to check these files
Benchmarks	What an analysis and a hover cost
Decision records	Why it is built the way it is

Install, requirements and the command line are in the README. What each passmcp check means is in passmcp's manual.

The README's coverage badge reads coverage.json, published with this site by the Manual workflow from the statement coverage CI measures on main.