Shield

MCP server bolyra/bolyra/io.github.bolyra/shield

Stdio MCP auth proxy: wrap any MCP server with per-tool permission enforcement.From the repository description

InstallClaude Code

claude mcp add bolyra -- npx -y @bolyra/shield

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

0 stars0 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

Keep looking

MCP servers are one crate of 326,852. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.