# Sigma Prep Math Worksheets (remote · www.sigmaprep.io)

Find free math worksheets (Pre-Algebra–Calculus, Statistics) as printable PDFs with answer keys.

- Trust score: 84/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `www.sigmaprep.io`: 84/100 (this document), [markdown](https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp.md), [page](https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp)

## Channel facts

- Endpoint: `https://www.sigmaprep.io/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-11-05.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 79/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 295 tokens (~147/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 67/100
  - Stability observed for 20 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 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Sigma Prep Math Worksheets MCP server?

Sigma Prep Math Worksheets is a hosted endpoint at https://www.sigmaprep.io/api/mcp, so there is nothing to install locally. 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 --transport http io-sigmaprep-worksheets 'https://www.sigmaprep.io/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-sigmaprep-worksheets": {
      "url": "https://www.sigmaprep.io/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-sigmaprep-worksheets": {
      "type": "http",
      "url": "https://www.sigmaprep.io/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-sigmaprep-worksheets]
url = "https://www.sigmaprep.io/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-sigmaprep-worksheets": {
      "type": "remote",
      "url": "https://www.sigmaprep.io/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-sigmaprep-worksheets --url 'https://www.sigmaprep.io/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-sigmaprep-worksheets:
    url: "https://www.sigmaprep.io/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-sigmaprep-worksheets": {
      "Transport": "http",
      "Url": "https://www.sigmaprep.io/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-sigmaprep-worksheets -t streamable-http -u 'https://www.sigmaprep.io/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-sigmaprep-worksheets": {
      "type": "http",
      "url": "https://www.sigmaprep.io/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-11-05 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (2)

### `search_worksheets` (~128 tokens)

Find worksheet topics

Finds Sigma Prep math worksheet topics (Pre-Algebra, Algebra 1, Geometry, Algebra 2, Precalculus, Calculus, Statistics) that match a request in plain words. Returns each topic's id, the difficulty levels it offers, its question types and its page on sigmaprep.io.

Input parameters:

- `course` (string): Optional course name to narrow the search, e.g. "Algebra 2".
- `query` (string, required): What the worksheet is about, in plain words, e.g. "factoring trinomials" or "law of sines".

### `create_worksheet` (~167 tokens)

Make a printable worksheet

Makes a new printable math worksheet for one topic as a PDF, with a separate copy that includes the answer key. Every call gives a fresh version of the problems. Topics are identified by the topic ids that the topic search returns.

Input parameters:

- `count` (integer): Number of problems, up to 40. Defaults to 20.
- `levels` (array): Difficulty: any of easy, medium, hard. Defaults to the page default.
- `questionTypes` (array): Optional question type ids for the topic, as returned by the topic search, to narrow the sheet.
- `topic` (string, required): Topic id, as returned by the topic search, e.g. "factoring-trinomials".
- `version` (integer): Optional version number, to get the same sheet again.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp#diagnostics

## Score history

- 2026-11-05: 84
- 2026-11-04: 83
- 2026-11-03: 83
- 2026-11-02: 82
- 2026-11-01: 82
- 2026-10-31: 81
- 2026-10-30: 81
- 2026-10-29: 80
- 2026-10-28: 80
- 2026-10-27: 79
- 2026-10-26: 79
- 2026-10-25: 78
- 2026-10-24: 78
- 2026-10-23: 77
- 2026-10-22: 77
- 2026-10-21: 77
- 2026-10-20: 76
- 2026-10-19: 75
- 2026-10-18: 75
- 2026-10-17: 74
- 2026-10-16: 74

## Common questions

### What is the Sigma Prep Math Worksheets MCP server?

Sigma Prep Math Worksheets is an MCP server listed in the public MCP registry as io.sigmaprep/worksheets. Find free math worksheets (Pre-Algebra–Calculus, Statistics) as printable PDFs with answer keys. This page covers its hosted endpoint (https://www.sigmaprep.io/api/mcp).

### Is the Sigma Prep Math Worksheets MCP server safe to use?

Sigma Prep Math Worksheets scores 84 out of 100 on VerifyMCP. 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 Sigma Prep Math Worksheets MCP server expose?

Sigma Prep Math Worksheets exposes 2 tools: search_worksheets, create_worksheet. Their descriptions and schemas cost roughly 295 tokens of context every time the server is loaded.

### Does the Sigma Prep Math Worksheets MCP server require authentication?

No. We connected to Sigma Prep Math Worksheets without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Sigma Prep Math Worksheets MCP server still maintained?

Sigma Prep Math Worksheets is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What did VerifyMCP test on the Sigma Prep Math Worksheets MCP server?

VerifyMCP ran 13 checks on Sigma Prep Math Worksheets, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- Remote endpoint: https://www.sigmaprep.io/api/mcp
- Website: https://www.sigmaprep.io/mcp
- Changelog RSS feed: https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/io-sigmaprep-worksheets/api-mcp