# PaperLesson — K-12 Vector Math Drills & Handwriting Worksheet Generator

> Generate seeded K-12 math drills with answer keys, handwriting ruling specs & vector PDFs.

- name: com.paperlesson/mcp
- version: 1.0.1
- connection class: R0 (autonomous)
- trust: 96/100
- quality: 89/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.paperlesson%2Fmcp
- tools: https://api.protogrid.dev/v1/servers/com.paperlesson%2Fmcp/tools

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

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "paperlesson": {
      "type": "http",
      "url": "https://paperlesson.com/api/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 100
- provenance: 85
- drivers: +repository +dns-namespace +website +reachable +uptime-100% +updated-4d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 89/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### 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`: 8 of 8 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,167 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump
- pass `tools.hidden_text`: no hidden text in tool names, descriptions, schemas or annotations

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

- n/a `stability.changes`, `stability.rug_pull`, `stability.new_links`: 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: 8, about 1,167 tokens to load them all
- tool set hash: a5f2a5d3801870af070fdd28785cfa1e
- tools last changed: 2026-11-10T12:03:17.207Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.paperlesson/mcp.svg)](https://protogrid.dev/servers/com.paperlesson/mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-11-10 `list_paperlesson_printable_generators` changed (inputSchema)
- 2026-11-10 `calculate_us_letter_vs_a4_printable_margins` changed (inputSchema)
- 2026-11-10 `explain_order_of_operations_step_tree` changed (inputSchema)
- 2026-11-10 `lookup_cursive_stroke_group_progression` changed (inputSchema)
- 2026-11-10 `build_name_tracing_worksheet_config` changed (inputSchema)

Full history: https://api.protogrid.dev/v1/servers/com.paperlesson%2Fmcp/changes

## Remotes

- https://paperlesson.com/api/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (8)

- `build_name_tracing_worksheet_config`: Configure custom student name tracing repetition rows, progressive fade-out scaffolding (solid guide -> dashed trace -> independent baseline), and paper orientation.
- `calculate_us_letter_vs_a4_printable_margins`: Calculate exact PostScript vector coordinates (pt) and safe classroom printer margins (0.5 in / 12.7 mm) to prevent edge clipping across US Letter and ISO A4.
- `explain_order_of_operations_step_tree`: Break down multi-step arithmetic expressions with parentheses, exponents, multiplication/division, and addition/subtraction for Grade 5-6 worksheet answer keys.
- `generate_fraction_number_line_coordinates`: Compute exact vector tick coordinates and benchmark labels for teaching proper fractions, improper fractions, and equivalent fractions on a 0-to-1 or 0-to-2 number line.
- `generate_seeded_math_drill_set`: Generate a reproducible set of K-12 arithmetic, fraction, or order-of-operations practice problems with exact answer keys using deterministic mulberry32 PRNG.
- `list_paperlesson_printable_generators`: List all free true-vector PDF worksheet generators on PaperLesson with direct pre-configured landing URLs.
- `lookup_cursive_stroke_group_progression`: Retrieve the optimal stroke-family teaching order for cursive lowercase and uppercase letters (undercurve, downcurve, overcurve, slant connectors) rather than alphabetical order.
- `lookup_handwriting_ruling_specs`: Look up exact physical millimeter and PostScript point (72 pt/inch) baseline, midline (x-height), and descender spacing for Pre-K through Grade 5 handwriting paper.