Best Claude Code MCP servers

A viewer for lens traces (Jacobian lens, logit lens, tuned lens) that runs beside a coding agent. Ships a Claude Code plugin with a /lens-view command and a model-callable tool that open a pane inside Claude Code, plus an MCP front end and a standalone terminal viewer.

A Claude Code plugin bundling polyglot, project-agnostic dev-workflow hooks plus the companion skills the hooks point at.

See what your skills and MCP servers put in front of Claude, which tools it called, what it read back, and what it did next. Observe-only; writes local logs only.

A denser Claude Code status line and a pane of the files, links and folders your session produced, with a fuzzy filter.

A Claude Code mod that has your current change reviewed by Codex and Grok side by side, without leaving the session.

A Claude Code plugin that lazy-loads glossary definitions into the model's context when your prompt mentions matching terms.

Basalt — publish from your AI agent: a Claude Code plugin bundling the Basalt MCP server (OAuth), a skill that converges on publishing/sharing docs by URL, and quiet session hooks plus a "links band" that collects every doc URL published in a session.

A Claude Code plugin bundle (ycc) that includes a status-bar mod under ycc/mods/status-bar, installable via the yandy-r/claude-plugins marketplace.

A living band above the prompt in Claude Code, fed by Claude's work. Eleven scenes in one mod, each with its own sound: pick the one you want to watch, and hear, while Claude works.

mesh-live est un mod Claude Code (plugin de function hooks en TypeScript) qui branche le Claude Agents Mesh directement dans le moteur de Claude Code.

Claude Code mod that shows Sanduhr's session and weekly Claude usage meters above the prompt, with pace markers, reset countdowns and alerts, reading only the local snapshot.json.

Everythings for Claude Code: MCP tools for a notes, lists and projects collaboration workspace, including project search, reading and editing plus remote questions and answers.