# Dyscalculia.io (remote · mcp.dyscalculia.io)

Open number-sense practice data and game catalogue for dyscalculia. Read-only.

- Trust score: 76/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcp.dyscalculia.io`: 76/100 (this document), [markdown](https://verifymcp.io/servers/io-dyscalculia-dyscalculia/mcp.md), [page](https://verifymcp.io/servers/io-dyscalculia-dyscalculia/mcp)

## Channel facts

- Endpoint: `https://mcp.dyscalculia.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## 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**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - 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**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 814 tokens (~135/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**: 33/100
  - Stability observed for 10 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 Dyscalculia.io MCP server?

Dyscalculia.io is a hosted endpoint at https://mcp.dyscalculia.io/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-dyscalculia-dyscalculia 'https://mcp.dyscalculia.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-dyscalculia-dyscalculia": {
      "url": "https://mcp.dyscalculia.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-dyscalculia-dyscalculia": {
      "type": "http",
      "url": "https://mcp.dyscalculia.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-dyscalculia-dyscalculia]
url = "https://mcp.dyscalculia.io/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add io-dyscalculia-dyscalculia --url 'https://mcp.dyscalculia.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-dyscalculia-dyscalculia:
    url: "https://mcp.dyscalculia.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-dyscalculia-dyscalculia": {
      "Transport": "http",
      "Url": "https://mcp.dyscalculia.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-dyscalculia-dyscalculia -t streamable-http -u 'https://mcp.dyscalculia.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-dyscalculia-dyscalculia": {
      "type": "http",
      "url": "https://mcp.dyscalculia.io/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 76, +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.

### 2026-11-03 (score 75, +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.

### 2026-11-01 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 72, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-26 (score 71)

First indexed and scored.

## MCP tools (6)

### `get_prevalence` (~257 tokens)

Dyscalculia prevalence figures

Published dyscalculia prevalence figures with sample size, publication year, age, the reference key (see get_reference) and a calc flag (true when the site calculated the figure itself). Filter by study id, by age (entries whose stated age range includes it; entries with no stated age are never matched) or by a percent range (entries whose figure or range overlaps it). With no filter, returns all 10 entries. These are published research estimates, not a diagnosis of any person. There is no worldwide pooled meta-analysis of dyscalculia prevalence: the 'worldwide' entry is a range across population studies. Studies use different criteria and ages, so figures are not directly comparable.

Input parameters:

- `age` (integer): Age in years, e.g. 11.
- `max_pct` (number): Upper bound in percent.
- `min_pct` (number): Lower bound in percent.
- `study` (string): One study id: worldwide-range, german-guideline, israel-1996, brazil-2016, uk-morsanyi-2018, england-devine-2018, england-devine-2013, uk-lewis-1994, flanders-2004, inserm-2007.

### `list_studies` (~138 tokens)

List the studies and sources behind the statistics

Lists every source the statistics page cites (peer-reviewed studies with DOI or PMID, plus official statistics and guidelines), with the topics each supports and, for population studies, the prevalence entries built from them. Filter by topic: prevalence, persistence, math-anxiety, interventions, by-country, sex-ratio, comorbidity, key-figures, family, official-counts, method. Use get_reference for one full citation.

Input parameters:

- `topic` (string): One of: prevalence, persistence, math-anxiety, interventions, by-country, sex-ratio, comorbidity, key-figures, family, official-counts, method.

### `get_reference` (~89 tokens)

Get one full reference

Full citation for one reference key (for example shalev2000, grosstsur1996), with its DOI and PMID when the site has them, the link the site uses, and the topics that cite it. The site holds 93 references; keys are returned by get_prevalence and list_studies.

Input parameters:

- `key` (string, required): Reference key, e.g. shalev2000

### `explain_screening_test` (~148 tokens)

Explain the free number-skills screening test

Describes the five screening games on dyscalculia.io: what each measures, how many items it has, what an item is and how items and games are scored in general terms, and the limits. Optionally returns the item sets (dot counts, number pairs, number-line targets, digit-sequence lengths). It describes the test only: it does not score anyone, take answers or return a result. The test is a screening of basic number skills, not a diagnosis.

Input parameters:

- `game` (string): One game key: dotEnumeration, symbolicCompare, nonSymbolicCompare, numberLine, digitSpan.
- `include_items` (boolean): Include the item sets. Default false.

### `list_chart_data` (~126 tokens)

Charts and tables on the statistics page

Lists the chart and table datasets on the statistics page (id, title, topic, section, row count) with their download addresses: the CSV and JSON of the whole page, one SVG per chart, the screening-test JSON and the changelog JSON. Pass an id (for example chart-1, table-2) to get that dataset's rows with their values, notes and reference keys.

Input parameters:

- `id` (string): One of: chart-1, chart-6, chart-8, chart-9, table-2, table-4, table-5.

### `get_citation` (~56 tokens)

How to cite and reuse the dyscalculia.io data

License (the compilation is CC BY 4.0; each figure belongs to its cited source), the citation text, an HTML credit link and the download addresses. To cite a single number, cite its study: use get_reference.

## Diagnostics

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

## Score history

- 2026-11-05: 76
- 2026-11-04: 75
- 2026-11-03: 75
- 2026-11-02: 74
- 2026-11-01: 74
- 2026-10-31: 73
- 2026-10-30: 73
- 2026-10-29: 73
- 2026-10-28: 72
- 2026-10-27: 72
- 2026-10-26: 71

## Common questions

### What is the Dyscalculia.io MCP server?

Dyscalculia.io is an MCP server listed in the public MCP registry as io.dyscalculia/dyscalculia. Open number-sense practice data and game catalogue for dyscalculia. Read-only. This page covers its hosted endpoint (https://mcp.dyscalculia.io/mcp).

### Is the Dyscalculia.io MCP server safe to use?

Dyscalculia.io scores 76 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 Dyscalculia.io MCP server expose?

Dyscalculia.io exposes 6 tools: get_prevalence, list_studies, get_reference, explain_screening_test, list_chart_data, get_citation. Their descriptions and schemas cost roughly 814 tokens of context every time the server is loaded.

### Does the Dyscalculia.io MCP server require authentication?

No. We connected to Dyscalculia.io without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Dyscalculia.io MCP server still maintained?

Dyscalculia.io 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.

## Links

- Remote endpoint: https://mcp.dyscalculia.io/mcp
- Repository: https://github.com/Dyscalculia-io/dyscalculia-mcp
- Website: https://dyscalculia.io/mcp
- Changelog RSS feed: https://verifymcp.io/servers/io-dyscalculia-dyscalculia/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-dyscalculia-dyscalculia/mcp.json
- HTML version of this page: https://verifymcp.io/servers/io-dyscalculia-dyscalculia/mcp