# Sigma Prep Math Worksheets

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

- name: io.sigmaprep/worksheets
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 87/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.sigmaprep%2Fworksheets
- tools: https://api.protogrid.dev/v1/servers/io.sigmaprep%2Fworksheets/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "worksheets": {
      "type": "http",
      "url": "https://www.sigmaprep.io/api/mcp",
      "headers": {
        "Authorization": "Bearer ${WORKSHEETS_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${WORKSHEETS_TOKEN}`.

## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 87/100 (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: 86 (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`: 2 of 2 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: create_worksheet (idempotentHint); search_worksheets (idempotentHint)
- pass `tools.token_cost`: about 506 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 4 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: 2, about 506 tokens to load them all
- tool set hash: 36c21785b3f6cc83c67c6e4b5fcc1220
- tools last changed: 2026-10-20T01:52:27.765Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.sigmaprep/worksheets.svg)](https://protogrid.dev/servers/io.sigmaprep/worksheets)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-20 `create_worksheet` changed (description, inputSchema, annotations)
  - before: Make a new printable math worksheet as a PDF, with a separate copy that includes the answer key. Every call gives a fresh version of the problems. Get the topic id from search_worksheets first.
  - after: 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.
- 2026-10-20 `search_worksheets` changed (description, annotations) **meaning changed**
  - before: Find Sigma Prep math worksheet topics (Pre-Algebra, Algebra 1, Geometry, Algebra 2, Precalculus, Calculus) that match what the teacher or student asked for. Use this first to get the topic id, the levels it offers and its question types, then call create_worksheet.
  - after: 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.

Full history: https://api.protogrid.dev/v1/servers/io.sigmaprep%2Fworksheets/changes

## Remotes

- https://www.sigmaprep.io/api/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (2)

- `create_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.
- `search_worksheets`: 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.