Calm MCP server
io.github.Eilodon/calm-mcp·v0.8.0·17 starsMCP server giving coding agents a call-graph-aware, hash-verified view of a codebase, not grep.
17 stars121 downloads/wk
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
Calm tools
No tool declarations could be read from the package source. They show once the server is installed.
Public scan report
scanner v0.1.10 · 2026-11-02 · same rubric, same numbers if you re-run it
- Code scan2 source files scanned25/25
- –Live reliabilityno gateway calls yet and no remote to proben/a
- –Tool poisoningtools not inspected (local package is not executed); not countedn/a
- Auth qualitylocal package, no credentials required12/15
- Maintenancelast push 2 days ago15/15
- Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
How Calm compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 92/100
- higher than 95% of 48,255 servers
- GitHub stars
- 17
- more than 90% of 28,688 servers
- Downloads a week
- 121
- more than 67% of 12,191 servers with a package
Install Calm in Claude Code, Cursor or VS Code
Runs npx -y @eilodon/calm-mcp on your machine. Read the scan report first; the gateway never runs local packages.
claude mcp add calm-mcp -- npx -y @eilodon/calm-mcp
What the publisher says
From the Calm repository's README, as published. We do not edit it. Read it on GitHub
CALM — Coding Agent Liveness Map
A live, graph-verified map of your codebase — so an AI coding agent can edit with its eyes open instead of grepping in the dark.
Real call graphs instead of vector-similarity guesses. Compiler-verified edges wherever a compiler is available. Hard safety gates on the write path itself, not just warnings an agent is free to scroll past. Measured claims in this README are tied either to a current CALM snapshot or to benchmark artifacts; repo-specific values change as the codebase changes.
New here? Quick start gets you running in under a minute — no clone, no Rust toolchain, works with Claude Code, VS Code, Cursor, Windsurf/Devin Desktop, Codex, Antigravity, and JetBrains. Comparing tools in this category? Jump straight to Proof, not promises. Want the internals? docs/architecture.md covers multi-tier indexing, the SCIP/LSP overlay system, the concurrency model, and the sanitization layer in full.
The problem
An AI agent that edits code without knowing who calls the function it's about to change will, sooner or later:
- Delete "dead code" that a dozen other files still call.
- Change a signature and miss half its call sites.
- Refactor a symbol it assumed was minor — and discover, after breaking the build, that it was the hub the whole module leaned on.
None of that is a reasoning failure. It's a visibility failure: the agent never had a map. Give it one, and the guessing stops.
Why "CALM"
Most coding agents operate the way anyone would in an unfamiliar codebase with only grep: no sense of what's wired to what, no way to know if touching this function ripples into fourteen others. That's not confidence — it's fast guessing.
CALM stands for Coding Agent Liveness Map. Liveness, because the map is never a stale snapshot — it watches the filesystem, reindexes incrementally as files change, and reports in every response how fresh it currently is (scanning → parsing → buildingedges → ready). Map*, because it's an actual graph — call edges, import edges, hub/coreness metrics — not a flat text index pretending to be one. Hand an agent a live, trustworthy map of the terrain, and it stops flailing. It gets calm.
What you get
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
Calm: common questions
- Is Calm MCP server safe?
- Yes, by our scan: it is graded A (92/100). Read the Calm safety report
- How do I install Calm?
- It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
- Does Calm need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Calm maintained?
- The last commit was 4 days ago (2026-10-31). The latest release is v0.8.0.
- What can I use instead of Calm?
- Servers from other publishers that do the same job: Codebase Memory MCP server.
- How does Calm compare with other MCP servers?
- safety score 92/100 (higher than 95% of 48,255 servers); github stars 17 (more than 90% of 28,688 servers); downloads a week 121 (more than 67% of 12,191 servers with a package). Full comparison.
Alternatives to Calm
Same job from other publishers: the closest match first, then the best rated.
- Codebase MemoryCodebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.not reviewedWidely usedC