Bernstein MCP server
The open-source governance layer for AI agents. Byte-identical run receipts, 40+ adapters, air-gap.
C57/100grade C
Adoption
Established
1.2k stars
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
Bernstein tools
No tool declarations could be read from the package source. They show once the server is installed.
Public scan report
scanner v0.1.9 · 2026-09-19 · same rubric, same numbers if you re-run it
1 high2 medium
- Code scan1500 source files scanned3/25
- –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 0 days ago15/15
- Maintainer identityregistry namespace matches repository owner7/10
Findings (3)
- mediumsubprocess with shell=True
exec.shell-truebernstein-3.19.2/.bandit-baseline.json: … cwd=str(cwd),\n671 shell=True,\n672 stdout=subprocess.PIP…
- mediumeval / new Function used
exec.evalbernstein-3.19.2/.bandit-baseline.json: … try:\n209 invariant_expr = eval(prop.invariant, {\"__builtins__\": {}}, … - highShell command built from a string (injection risk)
exec.shell-concatbernstein-3.19.2/packaging/npm/index.js: …unction which(cmd) { try { return execSync(`command -v ${cmd}`, { encoding: "utf8", stdio: ["pipe…
Overall 57/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON
Grade history
- 2026-09-19restoreD → Cscore 57: Shell command built from a string (injection risk); subprocess with shell=True; eval / new Function used
Install directly
claude mcp add bernstein -- uvx bernstein
Bernstein: common questions
- Is Bernstein MCP server safe?
- With care: it is graded C, so read the findings first (57/100). Read the Bernstein safety report
- How do I install Bernstein?
- It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
- Does Bernstein need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Bernstein maintained?
- The last commit was in the last day (2026-09-19). The latest release is v3.19.2.
- What can I use instead of Bernstein?
- Servers from other publishers that do the same job: Nautilus Compass Memory MCP server.
Alternatives to Bernstein
Same job from other publishers: the closest match first, then the best rated.
- Nautilus Compass MemoryLocal-first long-term memory for AI agents, with byte-recomputable signed verification receipts.not reviewedEstablishedB