# io.github.headlessherm-creator/polymath-megablaster-mcp (npm · polymath-megablaster-mcp)

Local deterministic calc MCP: exact math, dates, unit conversion, stats, subnet math.

- Trust score: 72/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `polymath-megablaster-mcp`: 72/100 (this document), [markdown](https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp.md), [page](https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp)

## Channel facts

- Registry: `npm`
- Package: `polymath-megablaster-mcp`
- Version: `3.0.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 35 of 107 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 3 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 820 tokens (~54/item across 15 items; 15 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 33/100
  - Stability observed for 10 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 80/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 41% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 15 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.headlessherm-creator/polymath-megablaster-mcp server?

io.github.headlessherm-creator/polymath-megablaster-mcp runs locally as an npm package, launched with npx -y polymath-megablaster-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add headlessherm-creator-polymath-megablaster-mcp -- npx -y polymath-megablaster-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "headlessherm-creator-polymath-megablaster-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polymath-megablaster-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "headlessherm-creator-polymath-megablaster-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polymath-megablaster-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add headlessherm-creator-polymath-megablaster-mcp -- npx -y polymath-megablaster-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "headlessherm-creator-polymath-megablaster-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "polymath-megablaster-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add headlessherm-creator-polymath-megablaster-mcp --command npx --arg -y --arg polymath-megablaster-mcp
```

### Hermes

```yaml
mcp_servers:
  headlessherm-creator-polymath-megablaster-mcp:
    command: "npx"
    args: ["-y", "polymath-megablaster-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "headlessherm-creator-polymath-megablaster-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "polymath-megablaster-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add headlessherm-creator-polymath-megablaster-mcp -t stdio -c npx -a -y polymath-megablaster-mcp
```

### Other

```json
{
  "mcpServers": {
    "headlessherm-creator-polymath-megablaster-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polymath-megablaster-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-19 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 71, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-11 (score 67, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-10 (score 52)

First indexed and scored.

## MCP tools (15)

### `calc_subnet` (~66 tokens)

Calculate subnet details (network, broadcast, usable hosts, mask) from a CIDR like 192.168.1.0/24

Input parameters:

- `cidr` (string, required): IPv4 address or CIDR, e.g. "192.168.1.0/24"

### `check_ip_type` (~49 tokens)

Check if an IPv4 address is private/reserved and identify which range it falls in

Input parameters:

- `ip` (string, required): IPv4 address, e.g. "192.168.1.1"

### `calculate` (~71 tokens)

Evaluate an arbitrary-precision math expression exactly (fixes LLM multi-digit arithmetic errors). Supports +,-,*,/,^,sqrt(),sin(),log(), etc.

Input parameters:

- `expression` (string, required): Math expression, e.g. "123456789 * 987654321" or "sqrt(2)^10"

### `count_tokens` (~47 tokens)

Count tokens in text using the GPT-3.5/4 (cl100k_base) tokenizer. Useful for managing context budget before sending a large prompt

Input parameters:

- `text` (string, required)

### `date_add` (~76 tokens)

Add or subtract days/weeks/months/years/businessDays from a date, handling leap years and month boundaries correctly

Input parameters:

- `amount` (integer, required): Positive or negative integer amount
- `date` (string, required): ISO 8601 date/datetime, e.g. "2026-03-03"
- `unit` (string, required)

### `date_diff` (~54 tokens)

Compute the exact difference between two dates in days, business days, and hours

Input parameters:

- `a` (string, required): First ISO 8601 date/datetime
- `b` (string, required): Second ISO 8601 date/datetime

### `convert_timezone` (~70 tokens)

Convert a UTC/ISO date into a formatted date+time string for any IANA time zone

Input parameters:

- `date` (string, required): ISO 8601 date/datetime
- `timeZone` (string, required): IANA time zone name, e.g. "America/New_York", "Asia/Tokyo"

### `compute_statistics` (~47 tokens)

Compute mean, median, stdev, variance, min/max, and percentiles (25/75/90) for a list of numbers

Input parameters:

- `numbers` (array, required): Array of numbers

### `convert_unit` (~87 tokens)

Convert a value between units of length, weight, volume, or temperature (fixes LLM unit-math errors)

Input parameters:

- `fromUnit` (string, required): e.g. "km", "lb", "celsius", "gal"
- `toUnit` (string, required): e.g. "mi", "kg", "fahrenheit", "l"
- `value` (string|number, required)

### `haversine_distance` (~58 tokens)

Compute exact great-circle distance in km/miles between two lat/long coordinates

Input parameters:

- `lat1` (number, required)
- `lat2` (number, required)
- `lon1` (number, required)
- `lon2` (number, required)

### `factorial` (~34 tokens)

Compute n! exactly using arbitrary-precision integer math (avoids float64 overflow past ~18)

Input parameters:

- `n` (integer, required)

### `permutations` (~37 tokens)

Compute nPr (permutations) exactly using arbitrary-precision integer math

Input parameters:

- `n` (integer, required)
- `r` (integer, required)

### `combinations` (~36 tokens)

Compute nCr (combinations) exactly using arbitrary-precision integer math

Input parameters:

- `n` (integer, required)
- `r` (integer, required)

### `convert_base` (~47 tokens)

Convert a number between decimal, hex, binary, and octal

Input parameters:

- `fromBase` (string, required)
- `toBase` (string, required)
- `value` (string|number, required)

### `levenshtein_distance` (~41 tokens)

Compute exact edit distance and similarity ratio between two strings (deterministic fuzzy matching)

Input parameters:

- `a` (string, required)
- `b` (string, required)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp#diagnostics

## Score history

- 2026-09-20: 72
- 2026-09-19: 72
- 2026-09-18: 71
- 2026-09-17: 67
- 2026-09-16: 67
- 2026-09-15: 67
- 2026-09-14: 67
- 2026-09-13: 67
- 2026-09-12: 67
- 2026-09-11: 67
- 2026-09-10: 52

## Common questions

### What is the io.github.headlessherm-creator/polymath-megablaster-mcp server?

io.github.headlessherm-creator/polymath-megablaster-mcp is listed in the public MCP registry as io.github.headlessherm-creator/polymath-megablaster-mcp. Local deterministic calc MCP: exact math, dates, unit conversion, stats, subnet math. This page covers its npm package (polymath-megablaster-mcp).

### Is the io.github.headlessherm-creator/polymath-megablaster-mcp server safe to use?

io.github.headlessherm-creator/polymath-megablaster-mcp scores 72 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.headlessherm-creator/polymath-megablaster-mcp server expose?

io.github.headlessherm-creator/polymath-megablaster-mcp exposes 15 tools: calc_subnet, check_ip_type, calculate, count_tokens, date_add, and 10 more. Their descriptions and schemas cost roughly 820 tokens of context every time the server is loaded.

### Is the io.github.headlessherm-creator/polymath-megablaster-mcp server still maintained?

io.github.headlessherm-creator/polymath-megablaster-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.headlessherm-creator/polymath-megablaster-mcp server under?

io.github.headlessherm-creator/polymath-megablaster-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/polymath-megablaster-mcp
- Socket report: https://socket.dev/npm/package/polymath-megablaster-mcp
- Repository: https://github.com/headlessherm-creator/polymath-megablaster-mcp
- Changelog RSS feed: https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp.json
- HTML version of this page: https://verifymcp.io/servers/headlessherm-creator-polymath-megablaster-mcp/polymath-megablaster-mcp