Evaluate, simplify, and differentiate mathematical expressions via MCP. STDIO or Streamable HTTP.
B low
- capability exposure inferred + 6
- recent drift inferred + 12
- tool safety inferred + 12
- trust mitigators mixed − 11
inferred mixed
The A–E grade is our heuristic synthesis — a "review this" prompt, not a verdict. Each factor is tagged by what backs it: attested (a verifiable record), reported (a third party's claim), or inferred (our own heuristic, e.g. permissions). See methodology.
grade last moved 6d ago · see ecosystem CVEs →
- A · 7 → B · 19
- B · 15 → A · 7
- B · 20 → B · 15
- B · 32 → B · 20
- C · 35 → B · 32
- B · 21 → C · 35
- B · 27 → B · 21
- A · 3 → B · 27
Inferred surface — each links to servers holding it:
No known CVEs for this server.
- high dangerous code
dynamic exec: vm exec
prompt-surface
shipped agent-instruction files + hidden-content / dangerous-code findings —
quoted from the analyzed source
analyzed commit 1756436 · analyzer v33 · 2w ago
skills & prompt files 34
- agent-rules cyanheads-calculator-mcp-server-1756436/AGENTS.md
- agent-rules cyanheads-calculator-mcp-server-1756436/CLAUDE.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-app-tool/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-prompt/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-resource/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-service/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-test/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/add-tool/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-auth/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-canvas/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-config/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-context/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-errors/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-linter/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-mirror/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-services/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-telemetry/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-testing/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-utils/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/api-workers/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/code-simplifier/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/design-mcp-server/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/field-test/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/git-wrapup/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/maintenance/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/orchestrations/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/polish-docs-meta/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/release-and-publish/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/report-issue-framework/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/report-issue-local/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/security-pass/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/setup/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/techniques/SKILL.md
- skill cyanheads-calculator-mcp-server-1756436/skills/tool-defs-analysis/SKILL.md
danger signals1
- dynamic code execution vm exec cyanheads-calculator-mcp-server-1756436/src/services/math/math-service.ts :552
vm.runInNewContext('result = fn()', sandbox, { timeout: this.config.evaluationTimeoutMs });
- recent drift +12 capability drift →
[](https://mcpobservatory.com/servers/smithery:cyanheads/calculator-mcp-server/security) Heuristic, inferred signals — false positives (legitimately powerful tools, forks, language ports) are expected. Treat each as "review this", not a verdict. See the ecosystem-wide picture on the security hub, or the fleet security of cyanheads.