# MatrixCalculator.net

> Exact matrix calculations with step-by-step results for six core matrix operations.

- name: io.github.gamestarry/matrixcalculator-mcp
- version: 0.1.0
- connection class: unknown (unknown)
- trust: 75/100
- quality: 94/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.gamestarry%2Fmatrixcalculator-mcp
- tools: https://api.protogrid.dev/v1/servers/io.github.gamestarry%2Fmatrixcalculator-mcp/tools

**Not classified yet.** The remote endpoints have not been probed successfully, or the listing has nothing to connect to.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "matrixcalculator-mcp": {
      "type": "http",
      "url": "https://mcp.matrixcalculator.net/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 28
- freshness: 100
- provenance: 90
- drivers: +repository +namespace-matches-repo +website -unreachable(1 failures) +updated-5d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 94/100 (new)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 6 of 6 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,086 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 5 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 6, about 1,086 tokens to load them all
- tool set hash: 3087875392b27f2a6b21bb24174d6b29
- tools last changed: 2026-10-15T12:32:43.278Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.gamestarry/matrixcalculator-mcp.svg)](https://protogrid.dev/servers/io.github.gamestarry/matrixcalculator-mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-15 `matrix_transpose` changed (description, annotations) **meaning changed**
  - before: Transpose a matrix by turning rows into columns. Accepts integers, decimals, or fraction strings such as 1/2, preserves exact values, and returns the source position for every result entry.
  - after: Transpose a rectangular or square matrix by exchanging rows and columns. Useful for requests to show where each result entry originated. Preserves exact integer, decimal, and fraction inputs and returns the transposed matrix with source-to-result position mappings.
- 2026-10-15 `matrix_inverse` changed (description, annotations) **meaning changed**
  - before: Calculate the inverse of a square matrix exactly with Gauss-Jordan elimination. Accepts integers, decimals, or fraction strings such as 1/2, and returns exact row-operation steps, the inverse matrix, verification, and singularity information.
  - after: Find an exact inverse of a square matrix with step-by-step Gauss-Jordan elimination. Use for inverse questions needing exact fractions, augmented matrices, row swaps, normalization, elimination, and verification that A times A-inverse is identity. Returns the inverse and verification, or null with singular=true if not invertible.
- 2026-10-15 `matrix_determinant` changed (description, annotations) **meaning changed**
  - before: Calculate the determinant of a square matrix exactly using elimination. Accepts integers, decimals, or fraction strings such as 1/2, and returns row-swap, elimination, diagonal-product, singularity, and final-result steps.
  - after: Find the exact determinant of a square matrix using fraction-preserving elimination. Use for determinant questions requiring row swaps, elimination steps, pivot multipliers, sign changes, diagonal products, or singularity checks. Returns the determinant and detailed operation steps.
- 2026-10-15 `matrix_multiply` changed (description, annotations) **meaning changed**
  - before: Multiply matrix A by matrix B when the number of columns of A equals the number of rows of B. Accepts integers, decimals, or fraction strings such as 1/2, and returns exact results with row-by-column calculation steps.
  - after: Multiply A by B when A's column count equals B's row count, including non-square matrices. Useful for exact matrix multiplication and step-by-step row-by-column dot products. Returns exact results plus each factor pair, product, and entry calculation; accepts fractions and decimals.
- 2026-10-15 `matrix_subtract` changed (description, annotations) **meaning changed**
  - before: Subtract the second matrix from the first matrix when both have identical dimensions. Accepts integers, decimals, or fraction strings such as 1/2, and returns exact results with one calculation step per entry.
  - after: Subtract matrix B from matrix A when both have the same dimensions. Useful for exact matrix subtraction, including negative values and step-by-step entry calculations. Accepts integers, decimals, and fraction strings; returns each exact difference and its calculation.
- 2026-10-15 `matrix_add` changed (description, annotations) **meaning changed**
  - before: Add two matrices with identical dimensions. Accepts integers, decimals, or fraction strings such as 1/2, and returns exact results with one calculation step per entry.
  - after: Add two matrices of the same dimensions entry by entry. Useful for exact matrix addition or explaining each entry step by step. Accepts integers, decimals, and fraction strings (for example 1/2); returns the exact sum matrix and a calculation for each position.

Full history: https://api.protogrid.dev/v1/servers/io.github.gamestarry%2Fmatrixcalculator-mcp/changes

## Remotes

- https://mcp.matrixcalculator.net/mcp (streamable-http, auth none, reachable false, uptime30d 0.95652175)

## Packages

_none_

## Tools (6)

- `matrix_add`: Add two matrices of the same dimensions entry by entry. Useful for exact matrix addition or explaining each entry step by step. Accepts integers, decimals, and fraction strings (for example 1/2); returns the exact sum matrix and a calculation for each position.
- `matrix_determinant`: Find the exact determinant of a square matrix using fraction-preserving elimination. Use for determinant questions requiring row swaps, elimination steps, pivot multipliers, sign changes, diagonal products, or singularity checks. Returns the determinant and detailed operation steps.
- `matrix_inverse`: Find an exact inverse of a square matrix with step-by-step Gauss-Jordan elimination. Use for inverse questions needing exact fractions, augmented matrices, row swaps, normalization, elimination, and verification that A times A-inverse is identity. Returns the inverse and verification, or null with singular=true if not invertible.
- `matrix_multiply`: Multiply A by B when A's column count equals B's row count, including non-square matrices. Useful for exact matrix multiplication and step-by-step row-by-column dot products. Returns exact results plus each factor pair, product, and entry calculation; accepts fractions and decimals.
- `matrix_subtract`: Subtract matrix B from matrix A when both have the same dimensions. Useful for exact matrix subtraction, including negative values and step-by-step entry calculations. Accepts integers, decimals, and fraction strings; returns each exact difference and its calculation.
- `matrix_transpose`: Transpose a rectangular or square matrix by exchanging rows and columns. Useful for requests to show where each result entry originated. Preserves exact integer, decimal, and fraction inputs and returns the transposed matrix with source-to-result position mappings.