# io.github.CQQOOQ123/jiheng (pypi · jiheng-mcp)

Exact math execution layer for AI agents: fractions, finance, units, dates. 19 packs.

- Trust score: 79/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-06

## Components

- pypi · `jiheng-mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp.md), [page](https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp)

## Channel facts

- Registry: `pypi`
- Package: `jiheng-mcp`
- Version: `0.3.9`
- 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 2026-11-06.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised build step with no custom scripting around it.
  - 0 of 2 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to CQQOOQ123/jiheng).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 0 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 282 tokens (~282/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 1 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.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the io.github.CQQOOQ123/jiheng MCP server?

io.github.CQQOOQ123/jiheng runs locally as a PyPI package, launched with uvx jiheng-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 cqqooq123-jiheng -- uvx jiheng-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "cqqooq123-jiheng": {
      "command": "uvx",
      "args": [
        "jiheng-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "cqqooq123-jiheng": {
      "command": "uvx",
      "args": [
        "jiheng-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add cqqooq123-jiheng -- uvx jiheng-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "cqqooq123-jiheng": {
      "type": "local",
      "command": [
        "uvx",
        "jiheng-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add cqqooq123-jiheng --command uvx --arg jiheng-mcp
```

### Hermes

```yaml
mcp_servers:
  cqqooq123-jiheng:
    command: "uvx"
    args: ["jiheng-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "cqqooq123-jiheng": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "jiheng-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add cqqooq123-jiheng -t stdio -c uvx -a jiheng-mcp
```

### Other

```json
{
  "mcpServers": {
    "cqqooq123-jiheng": {
      "command": "uvx",
      "args": [
        "jiheng-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.

### 2026-11-06 (score 79, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-11-05 (score 64)

First indexed and scored.

## MCP tools (1)

### `calc` (~282 tokens)

Evaluate a math expression exactly: fractions stay fractions (1/3), radicals stay radicals (sqrt(2)). Symbolic: solve/diff/simplify/expand/factor/subs. Built-ins: sum/mean/std/median/quantile, loan_pmt, npv, cagr, discount, markup, convert, unit_convert, normal/option functions (norm_cdf, black_scholes_call), dates. Common composite functions: norm_cdf(x), black_scholes_call(spot,strike,years,rate,vol), npv(rate, flows[, start]), loan_pmt(principal, annualRate, years), unit_convert(value, from, to). Call functions() to list names, help("name") for a signature. N(expr, digits) is numeric evaluation, NOT the normal CDF. For multi-step work use one call with steps:[{name,expr},...]; later steps may reference earlier names. Results include a full-precision decimal; copy it verbatim and never round.

Input parameters:

- `defs` (object): optional custom constant/function definitions
- `expr` (string): final expression, e.g. 1000*(1+0.13) or mean([1,2,3]); optional when steps are given
- `steps` (array): named intermediate steps; later steps can reference earlier names

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp#diagnostics

## Score history

- 2026-11-06: 79
- 2026-11-05: 64

## Common questions

### What is the io.github.CQQOOQ123/jiheng MCP server?

io.github.CQQOOQ123/jiheng is an MCP server listed in the public MCP registry as io.github.CQQOOQ123/jiheng. Exact math execution layer for AI agents: fractions, finance, units, dates. 19 packs. This page covers its PyPI package (jiheng-mcp).

### Is the io.github.CQQOOQ123/jiheng MCP server safe to use?

io.github.CQQOOQ123/jiheng scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 6 November 2026. Its build provenance is signed and verified. 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.CQQOOQ123/jiheng MCP server expose?

io.github.CQQOOQ123/jiheng exposes 1 tool: calc. Their descriptions and schemas cost roughly 282 tokens of context every time the server is loaded.

### Is the io.github.CQQOOQ123/jiheng MCP server still maintained?

io.github.CQQOOQ123/jiheng is still listed as active in the MCP registry. We last reached this channel on 6 November 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.CQQOOQ123/jiheng MCP server under?

io.github.CQQOOQ123/jiheng declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

### What did VerifyMCP test on the io.github.CQQOOQ123/jiheng MCP server?

VerifyMCP ran 15 checks on io.github.CQQOOQ123/jiheng, covering Malware scan, Known CVEs, Install scripts, Dependency health and 11 more. One item could not be completed, a gap on our side rather than a finding about io.github.CQQOOQ123/jiheng: Stability. One category scores 0 for that reason, because we only credit what we can confirm. Endpoint Security and Transport & Reachability do not apply to a PyPI package, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- PyPI project: https://pypi.org/project/jiheng-mcp/
- Socket report: https://socket.dev/pypi/package/jiheng-mcp
- Repository: https://github.com/CQQOOQ123/jiheng
- Changelog RSS feed: https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp.json
- HTML version of this page: https://verifymcp.io/servers/cqqooq123-jiheng/jiheng-mcp