# VirWave Breathe (npm · virwave-breathe)

Calm, animated breathing sessions paced to your breath. Runs locally and collects nothing.

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-26

## Components

- remote · `xswebtvkueusdaeboizp.supabase.co`: 68/100, [markdown](https://verifymcp.io/servers/virwave-virwave-breathe/functions-v1-breathe.md), [page](https://verifymcp.io/servers/virwave-virwave-breathe/functions-v1-breathe)
- npm · `virwave-breathe`: 65/100 (this document), [markdown](https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe.md), [page](https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe)

## Channel facts

- Registry: `npm`
- Package: `virwave-breathe`
- Version: `1.2.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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 2026-09-26.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 19/100
  - Repository check failed: the declared repository URL returned HTTP 404.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 2 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 75/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 2259 tokens (~376/item across 6 items; 3 tools + 3 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 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.
  - Supports UI / widget rendering.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the VirWave Breathe MCP server?

VirWave Breathe runs locally as an npm package, launched with npx -y virwave-breathe. 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 virwave-virwave-breathe -- npx -y virwave-breathe
```

### Cursor

```json
{
  "mcpServers": {
    "virwave-virwave-breathe": {
      "command": "npx",
      "args": [
        "-y",
        "virwave-breathe"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "virwave-virwave-breathe": {
      "command": "npx",
      "args": [
        "-y",
        "virwave-breathe"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add virwave-virwave-breathe -- npx -y virwave-breathe
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "virwave-virwave-breathe": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "virwave-breathe"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add virwave-virwave-breathe --command npx --arg -y --arg virwave-breathe
```

### Hermes

```yaml
mcp_servers:
  virwave-virwave-breathe:
    command: "npx"
    args: ["-y", "virwave-breathe"]
```

### Netclaw

```json
{
  "McpServers": {
    "virwave-virwave-breathe": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "virwave-breathe"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add virwave-virwave-breathe -t stdio -c npx -a -y virwave-breathe
```

### Other

```json
{
  "mcpServers": {
    "virwave-virwave-breathe": {
      "command": "npx",
      "args": [
        "-y",
        "virwave-breathe"
      ]
    }
  }
}
```

## 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.

### 2026-09-26 (score 65, 0)

- [functional regression] Security disclosure: fail → unverified

### 2026-09-25 (score 65, +9)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 56)

First indexed and scored.

## MCP tools (3)

### `list_patterns` (~57 tokens)

List breathing patterns

Lists the VirWave breathing patterns this server can play: phases and seconds, what each rhythm is good for, which shapes can draw it, whether it is hold-free, and any safety note about breath holds. Hold-free patterns are listed first.

### `breathe` (~459 tokens)

Start a breathing session

Creates an animated VirWave breathing session the person can follow with their eyes. Invoke it when someone asks for a breathing break, a breathing exercise, guided breathing, or a moment to calm down, relax, or reset: the visual session is the breathing break. In a client that supports MCP Apps (Claude Desktop, for example), the session appears in the chat itself, and no browser opens and no file is saved unless out_dir is given or the person has turned on saving a copy. In any other client, it is saved as a self-contained HTML page on this computer and, unless out_dir is given, opens in the person's default browser (they can turn that off in settings). The result says which happened. Either way the session opens at rest and starts when the person presses Begin, so nothing moves without their say-so. With no inputs, it plays the default Circle 4-8 Breathing session, which has no breath holds.

Input parameters:

- `cycles` (integer): Exact number of breath cycles. Takes precedence over minutes.
- `minutes` (number): Approximate session length; rounded to whole breath cycles.
- `out_dir` (string): Directory to write the page into, for a client that shows the page itself (for example, by publishing it as an Artifact). When set, the page is not opened in the browser. When left out, the page is s…
- `pattern` (string): Pattern id from list_patterns. Defaults to in-out-extended-exhale. list_patterns marks each hold-free pattern with "holdFree": true.
- `shape` (string): Shape to draw. Each pattern lists the shapes it can use; defaults to the pattern's first. box: A square whose outline draws itself once per breath cycle. triangle: A triangle whose outline draws itse…

### `start_session` (~546 tokens)

Start a matched session

Matches a VirWave session the way the app's entry flow does: how clearly a feeling is coming through, what they'd like instead, and how long they have. Invoke it when someone says how they are feeling, or what they would like to feel instead, and wants a breathing session that fits. The session moves through stages (arrive, the matched core, close), each with its own shape, at one steady breath pace, and ends at the chosen length. In a client that supports MCP Apps (Claude Desktop, for example), the session appears in the chat itself, and no browser opens and no file is saved unless out_dir is given or the person has turned on saving a copy. In any other client, it is saved as a self-contained HTML page on this computer and, unless out_dir is given, opens in the person's default browser (they can turn that off in settings). The result says which happened. Either way the session waits for Begin, and the result says why it was picked and which stages it has. Every matched session is hold-free: breathe in, a longer breath out.

Input parameters:

- `feeling` (string, required): How the feeling is coming through: how clearly, not which feeling it is. The options describe how clear the signal is, and none of them names an emotion. flat (Flat / no signal: Numb, far off, nothin…
- `goal` (string, required): What they'd like instead. grounded (Grounded: Back in the body, contact restored.) calm (Calm: Slower, softer, less pressure.) clear (Clear: One thing at a time, in focus.) unstuck (Unstuck: The loop…
- `minutes` (number, required): How long they have: 2, 5, 10, or 15 minutes. Longer sessions move through more stages, not just more time.
- `out_dir` (string): Directory to write the page into, for a client that shows the page itself (for example, by publishing it as an Artifact). When set, the page is not opened in the browser. When left out, the page is s…

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe#diagnostics

## Score history

- 2026-09-26: 65
- 2026-09-25: 65
- 2026-09-24: 56

## Common questions

### What is the VirWave Breathe MCP server?

VirWave Breathe is an MCP server listed in the public MCP registry as io.github.virwave/virwave-breathe. Calm, animated breathing sessions paced to your breath. Runs locally and collects nothing. This page covers its npm package (virwave-breathe).

### Is the VirWave Breathe MCP server safe to use?

VirWave Breathe scores 65 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 26 September 2026. It declares no install or post-install scripts. 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 VirWave Breathe MCP server expose?

VirWave Breathe exposes 3 tools: list_patterns, breathe, start_session. Their descriptions and schemas cost roughly 1,062 tokens of context every time the server is loaded.

### Is the VirWave Breathe MCP server still maintained?

VirWave Breathe is still listed as active in the MCP registry. We last reached this channel on 26 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the VirWave Breathe MCP server under?

VirWave Breathe declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/virwave-breathe
- Socket report: https://socket.dev/npm/package/virwave-breathe
- Website: https://virwave.com/
- Changelog RSS feed: https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe.xml
- Changelog JSON feed: https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe.json
- HTML version of this page: https://verifymcp.io/servers/virwave-virwave-breathe/virwave-breathe