# Reconstitution Calculator (npm · reconstitution-calculator-mcp)

Lab math: reconstitution, unit conversion, C1V1, molarity, percent w/v, serial dilution.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- npm · `reconstitution-calculator-mcp`: 66/100 (this document), [markdown](https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp.md), [page](https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp)

## Channel facts

- Registry: `npm`
- Package: `reconstitution-calculator-mcp`
- Version: `1.0.0`
- 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 2026-10-18.

- **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.
  - 31 of 92 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: no source repository is declared.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 792 tokens (~132/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 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 Reconstitution Calculator MCP server?

Reconstitution Calculator runs locally as an npm package, launched with npx -y reconstitution-calculator-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 io-peptaralabs-reconstitution-calculator -- npx -y reconstitution-calculator-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "io-peptaralabs-reconstitution-calculator": {
      "command": "npx",
      "args": [
        "-y",
        "reconstitution-calculator-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-peptaralabs-reconstitution-calculator": {
      "command": "npx",
      "args": [
        "-y",
        "reconstitution-calculator-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add io-peptaralabs-reconstitution-calculator -- npx -y reconstitution-calculator-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-peptaralabs-reconstitution-calculator": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "reconstitution-calculator-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-peptaralabs-reconstitution-calculator --command npx --arg -y --arg reconstitution-calculator-mcp
```

### Hermes

```yaml
mcp_servers:
  io-peptaralabs-reconstitution-calculator:
    command: "npx"
    args: ["-y", "reconstitution-calculator-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "io-peptaralabs-reconstitution-calculator": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "reconstitution-calculator-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-peptaralabs-reconstitution-calculator -t stdio -c npx -a -y reconstitution-calculator-mcp
```

### Other

```json
{
  "mcpServers": {
    "io-peptaralabs-reconstitution-calculator": {
      "command": "npx",
      "args": [
        "-y",
        "reconstitution-calculator-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.

### 2026-10-18 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 65)

First indexed and scored.

## MCP tools (6)

### `reconstitution_concentration` (~157 tokens)

Reconstitution concentration

Concentration of a lyophilized powder after adding a diluent volume, in mg/mL and mcg/mL. Optionally gives the volume in mL and µL that holds a wanted amount. For laboratory calculations only.

Input parameters:

- `diluent_ml` (number, required): Volume of diluent added, in mL. Must be greater than 0.
- `powder_amount` (number, required): Mass of powder in the vial. Must be greater than 0.
- `powder_unit` (string): Unit of powder_amount. Default mg.
- `wanted_amount` (number): Optional mass you want to draw out. Must be greater than 0.
- `wanted_unit` (string): Unit of wanted_amount. Default mcg.

### `convert_units` (~152 tokens)

Convert units

Convert a value between units of the same kind: mass, volume or mass concentration. Supported units: kg, g, mg, mcg, ug, µg, ng, L, mL, uL, µL, nL, g/L, mg/mL, mg/L, mcg/mL, ug/mL, µg/mL, mcg/L, ug/L, µg/L, ng/mL. For laboratory calculations only.

Input parameters:

- `from` (string, required): Unit to convert from, for example mg, mL or mg/mL.
- `to` (string, required): Unit to convert to, of the same kind as from.
- `value` (number, required): Value to convert.

### `dilution_c1v1` (~102 tokens)

Dilution C1V1 = C2V2

Solve C1 x V1 = C2 x V2 for the single missing value. Give exactly three of c1, v1, c2, v2 in consistent units. Also returns the diluent volume to add. For laboratory calculations only.

Input parameters:

- `c1` (number): Stock concentration.
- `c2` (number): Final concentration.
- `v1` (number): Stock volume.
- `v2` (number): Final volume.

### `molarity` (~172 tokens)

Molarity

Relates mass, molarity, volume and molecular weight (mass g = M x L x g/mol). Give molarity to get the mass needed, or give mass to get the molarity. For laboratory calculations only.

Input parameters:

- `mass` (number): Mass of solute. Give this or molarity, not both.
- `mass_unit` (string): Unit of mass. Default g.
- `molarity` (number): Target molarity. Give this or mass, not both.
- `molarity_unit` (string): Unit of molarity. Default M.
- `mw` (number, required): Molecular weight in g/mol. Must be greater than 0.
- `volume` (number, required): Solution volume. Must be greater than 0.
- `volume_unit` (string): Unit of volume. Default mL.

### `percent_solution` (~79 tokens)

Percent w/v solution

Grams of solute for a percent weight per volume solution (g = percent x mL / 100). For laboratory calculations only.

Input parameters:

- `final_volume_ml` (number, required): Final volume in mL. Must be greater than 0.
- `percent_wv` (number, required): Percent w/v, greater than 0 and at most 100.

### `serial_dilution` (~130 tokens)

Serial dilution

Concentration in each tube of a serial dilution, plus the transfer and diluent volume per tube. Output concentrations use the same unit as start_conc. For laboratory calculations only.

Input parameters:

- `factor` (number, required): Dilution factor per step. Must be greater than 1.
- `start_conc` (number, required): Starting concentration. Must be greater than 0.
- `steps` (integer, required): Number of tubes, a whole number from 1 to 20.
- `volume_per_tube_ml` (number, required): Final volume in each tube, in mL. Must be greater than 0.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp#diagnostics

## Score history

- 2026-10-18: 66
- 2026-10-17: 65
- 2026-10-16: 65

## Common questions

### What is the Reconstitution Calculator MCP server?

Reconstitution Calculator is an MCP server listed in the public MCP registry as io.peptaralabs/reconstitution-calculator. Lab math: reconstitution, unit conversion, C1V1, molarity, percent w/v, serial dilution. This page covers its npm package (reconstitution-calculator-mcp).

### Is the Reconstitution Calculator MCP server safe to use?

Reconstitution Calculator scores 66 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 18 October 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 Reconstitution Calculator MCP server expose?

Reconstitution Calculator exposes 6 tools: reconstitution_concentration, convert_units, dilution_c1v1, molarity, percent_solution, serial_dilution. Their descriptions and schemas cost roughly 792 tokens of context every time the server is loaded.

### Is the Reconstitution Calculator MCP server still maintained?

Reconstitution Calculator is still listed as active in the MCP registry. We last reached this channel on 18 October 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 Reconstitution Calculator MCP server under?

Reconstitution Calculator 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/reconstitution-calculator-mcp
- Socket report: https://socket.dev/npm/package/reconstitution-calculator-mcp
- Website: https://www.peptaralabs.io/
- Changelog RSS feed: https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp.json
- HTML version of this page: https://verifymcp.io/servers/io-peptaralabs-reconstitution-calculator/reconstitution-calculator-mcp