The MCP ecosystem often has several independent packages implementing the same tool — and "Calculator" currently has 9. Every one of them was scanned with the same deterministic engine, so the numbers below are directly comparable: the Trust Score (A–F), the capability blast radius, and how much of the package the scan could actually inspect. They are ranked by score; ties break toward unscoped, longer-established packages.
| Implementation | Package | Trust | Capability | Coverage | Findings | Scanned |
|---|---|---|---|---|---|---|
| Calculatorbest by tech-sushant | @tech-sushant/calculator-mcp
npm |
A 99/100 | Minimal | Source | 0 | 2026-09-07 |
| Calculator by proflulab | mcp-calculator
npm |
A 99/100 | Minimal | Source | 0 | 2026-09-07 |
| Calculator by githejie | mcp-server-calculator
PyPI |
A 99/100 | Minimal | Source | 0 | 2026-08-25 |
| Calculator by wang-junjian | calculator-mcp-server
PyPI |
A 99/100 | Minimal | Source | 0 | 2026-08-25 |
| Calculator by npm | calculator-mcp-server
npm |
A 98/100 | Minimal | Source | 0 | 2026-09-07 |
| Calculator by halfords-pro | @halfords-pro/calculator
npm |
A 98/100 | Minimal | Source | 0 | 2026-09-07 |
| Calculator by PyPI | mcp-calculator
PyPI |
A 98/100 | Minimal | Source | 0 | 2026-08-25 |
| Calculator Source verified by wrtnlabs | @wrtnlabs/calculator-mcp
npm |
A 94/100 | High | Source | 4 | 2026-09-07 |
| Calculator by cyanheads | @cyanheads/calculator-mcp-server
npm |
A 93/100 | High | Source | 1 | 2026-09-07 |
A higher-ranked implementation is not "the official one" — ranking reflects only what the deterministic scan found in each published package. Open an implementation to read its individual findings with evidence, its scan history per version, and to grab an embeddable badge. Scores are automated opinions, recomputed on every rescan.