# Mizuki (npm · mizuki-mcp)

Fixed-price maintenance for public GitHub issues, paid in USDC on Solana.

- Trust score: 76/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `mizuki-mcp`: 76/100 (this document), [markdown](https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp.md), [page](https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp)

## Channel facts

- Registry: `npm`
- Package: `mizuki-mcp`
- Version: `0.1.2`
- 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 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 96 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 17 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 72/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 567 tokens (~43/item across 13 items; 13 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 60/100
  - Stability observed for 18 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% 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 13 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 13 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 Mizuki MCP server?

Mizuki runs locally as an npm package, launched with npx -y mizuki-mcp. 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 org-opencovenant-mizuki -- npx -y mizuki-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "org-opencovenant-mizuki": {
      "command": "npx",
      "args": [
        "-y",
        "mizuki-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "org-opencovenant-mizuki": {
      "command": "npx",
      "args": [
        "-y",
        "mizuki-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add org-opencovenant-mizuki -- npx -y mizuki-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add org-opencovenant-mizuki --command npx --arg -y --arg mizuki-mcp
```

### Hermes

```yaml
mcp_servers:
  org-opencovenant-mizuki:
    command: "npx"
    args: ["-y", "mizuki-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "org-opencovenant-mizuki": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "mizuki-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add org-opencovenant-mizuki -t stdio -c npx -a -y mizuki-mcp
```

### Other

```json
{
  "mcpServers": {
    "org-opencovenant-mizuki": {
      "command": "npx",
      "args": [
        "-y",
        "mizuki-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-09-20 (score 76, +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.

### 2026-09-18 (score 75, +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.

### 2026-09-16 (score 74, +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.

### 2026-09-13 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 71, +4)

- [functional improvement] Stability: unverified → 0.23

### 2026-09-03 (score 67, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-02 (score 52)

First indexed and scored.

## MCP tools (13)

### `mizuki_quote` (~58 tokens)

Get a fixed-price quote and x402 payment requirements for a public GitHub issue. With MIZUKI_API_TOKEN, the repository must already be connected and the quote is linked for payment recovery.

Input parameters:

- `github_issue_url` (string, required)

### `mizuki_submit` (~50 tokens)

Submit a quoted job with a wallet-created x402 PAYMENT-SIGNATURE.

Input parameters:

- `idempotency_key` (string, required)
- `payment_signature` (string, required)
- `quote_id` (string, required)

### `mizuki_status` (~33 tokens)

Read delivery, PR, validation, or refund status for a Mizuki job.

Input parameters:

- `job_id` (string, required)

### `mizuki_repositories` (~35 tokens)

List repositories linked to the authenticated maintainer and their current readiness. Requires a repositories:read MIZUKI_API_TOKEN.

### `mizuki_repository_readiness` (~50 tokens)

Read current readiness for one repository already linked to the authenticated maintainer. Never bypasses maintainer or GitHub App checks.

Input parameters:

- `owner` (string, required)
- `repo` (string, required)

### `mizuki_repository_issues` (~51 tokens)

List bounded maintenance candidates for a linked repository after authenticated maintainer checks. Requires a repositories:read MIZUKI_API_TOKEN.

Input parameters:

- `owner` (string, required)
- `repo` (string, required)

### `mizuki_preflight` (~53 tokens)

Run repository, authorization, scope, and maintainer readiness checks for one issue without creating a quote or payment. Requires a repositories:read MIZUKI_API_TOKEN.

Input parameters:

- `github_issue_url` (string, required)

### `mizuki_payment_status` (~68 tokens)

Safely check whether an exact quote and idempotency key already reserved a job. This read never requests a wallet signature or submits payment. Requires a jobs:read MIZUKI_API_TOKEN.

Input parameters:

- `idempotency_key` (string, required)
- `quote_id` (string, required)

### `mizuki_bounties` (~26 tokens)

List public maintenance bounties created after eligible jobs receive a full refund.

### `mizuki_bounty` (~41 tokens)

Inspect one maintenance bounty, its claim requirements, separate AI review, maintainer approval, and funded SOL escrow status.

Input parameters:

- `bounty_id` (string, required)

### `mizuki_treasury` (~36 tokens)

Inspect the refund reserve wallet status and planning estimates derived from service records. Planning estimates do not prove custody or grant spending authority.

### `mizuki_capabilities` (~25 tokens)

Inspect proposed capability changes and the evidence required before a change can reach production.

### `mizuki_capability_handoff` (~41 tokens)

Read a hashed record of the failures, benchmark, and approvals required before a capability change can reach production.

Input parameters:

- `capability_id` (string, required)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp#diagnostics

## Score history

- 2026-09-20: 76
- 2026-09-19: 75
- 2026-09-18: 75
- 2026-09-17: 74
- 2026-09-16: 74
- 2026-09-15: 73
- 2026-09-14: 73
- 2026-09-13: 73
- 2026-09-12: 72
- 2026-09-11: 72
- 2026-09-10: 71
- 2026-09-09: 71
- 2026-09-08: 67
- 2026-09-07: 67
- 2026-09-06: 67
- 2026-09-05: 67
- 2026-09-04: 67
- 2026-09-03: 67
- 2026-09-02: 52

## Common questions

### What is the Mizuki MCP server?

Mizuki is an MCP server listed in the public MCP registry as org.opencovenant/mizuki. Fixed-price maintenance for public GitHub issues, paid in USDC on Solana. This page covers its npm package (mizuki-mcp).

### Is the Mizuki MCP server safe to use?

Mizuki scores 76 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 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 Mizuki MCP server expose?

Mizuki exposes 13 tools: mizuki_quote, mizuki_submit, mizuki_status, mizuki_repositories, mizuki_repository_readiness, and 8 more. Their descriptions and schemas cost roughly 567 tokens of context every time the server is loaded.

### Is the Mizuki MCP server still maintained?

Mizuki is still listed as active in the MCP registry. We last reached this channel on 20 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 Mizuki MCP server under?

Mizuki declares the Apache-2.0 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/mizuki-mcp
- Socket report: https://socket.dev/npm/package/mizuki-mcp
- Repository: https://github.com/open-covenant/covenant
- Changelog RSS feed: https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp.json
- HTML version of this page: https://verifymcp.io/servers/org-opencovenant-mizuki/mizuki-mcp