io.github.chrischall/musescore-mcp
NPM · @CHRISCHALL/MUSESCORE-MCP · SCANNED AUG 8
MuseScore for Claude — search sheet music and read score metadata via your signed-in browser
Available components
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. How we score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 42 of 132 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency19
- Repository check failed: the declared repository URL returned HTTP 404. See how to fix → View diagnostics → Fail
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 2 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability64
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2048 tokens (~204/item across 10 items; 10 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
- Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
npm · @chrischall/musescore-mcp
claude mcp add chrischall-musescore-mcp -- npx -y @chrischall/musescore-mcp
codex mcp add chrischall-musescore-mcp -- npx -y @chrischall/musescore-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"chrischall-musescore-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"@chrischall/musescore-mcp"
],
"enabled": true
}
}
} openclaw mcp add chrischall-musescore-mcp --command npx --arg -y --arg @chrischall/musescore-mcp
mcp_servers:
chrischall-musescore-mcp:
command: "npx"
args: ["-y", "@chrischall/musescore-mcp"] {
"mcpServers": {
"chrischall-musescore-mcp": {
"command": "npx",
"args": [
"-y",
"@chrischall/musescore-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 8 Aug 26 +4
- Known CVEs: partial → pass ▲ security
- Dependency health: partial → 0.85 functional
- 7 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 6 Aug 26 +28
- Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. security
- Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window). security
- Stability: unverified → 0.03 ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- MCP protocol: unverified → pass ▲ functional
- First check of Tool coverage: 100 functional
- First check of Schema quality: fail functional
- First check of Schema quality: fail functional
- First check of Schema quality: excellent functional
- Tool coverage: Tool coverage not yet verified: we do not have a sandbox capture of the tool definitions this version of the package serves yet. functional
- Capabilities: Protocol version not yet verified: we do not have a sandbox capture of the MCP handshake this version of the package performs yet. functional
- Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
- Package version: 0.15.3 → 0.15.4 functional
- 5 Aug 26 +1
- CVE-2026-69207 no longer affects this package ▲ security
- Known CVEs: fail → partial ▲ security
- 4 Aug 26 −1
- CVE-2026-69207 affects this package: medium ▼ security
- Known CVEs: partial → fail ▼ security
- 2 Aug 26 +22
- Provenance: fail → unverified ▼ security
- Install scripts: pass → unverified ▼ security
- Known CVEs: unverified → partial ▲ security
- Malware scan: unverified → pass ▲ security
- Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. security
- License: pass → unverified ▼ functional
- Maintenance: pass → unverified ▼ functional
- Dependency health: unverified → partial ▲ functional
- Capabilities: Protocol version not yet verified: we do not have a sandbox capture of the MCP handshake this version of the package performs yet. functional
- Tool coverage: Tool coverage not yet verified: we do not have a sandbox capture of the tool definitions this version of the package serves yet. functional
- Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
- Licence: MIT functional
- 1 Aug 26 −10
- Known CVEs: partial → unverified ▼ security
- Dependency health: partial → unverified ▼ functional
- 31 Jul 26 +18
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 8 Aug 2026 · Analysed npm/@chrischall/[email protected]
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Dependencies 132 packages
| Packages resolved | 132 |
|---|---|
| Stale | 42 |
| Tree resolution | Complete |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
musescore_download Resolve or download an official MuseScore file ~385
Get the official MuseScore file for a free or already-entitled score (pdf, mid, mscz, or mxl). Identify the score by a url (a musescore.com score URL or /user/<id>/scores/<id> path) or a user_id + score_id pair. Without output_path it returns the official download URL for you to open in your signed-in browser tab; with output_path it downloads the actual file bytes (incl. multi-page official PDF) to that local path. For PDF downloads, setting fallback_svg=true will render page 1 from its SVG when the official download is likely blocked (not free, no hasAccess) or fails (403, S3 error). If a score is view-free but its download is Premium/purchase-gated, returns a structured {status:"gated", requiresPurchase:true, downloadUrl, scoreUrl, svgStitchAvailable} result (no file written) rather than erroring.
| Name | Type | Req | Description |
|---|---|---|---|
| fallback_svg | boolean | – | If true and the official PDF download is likely blocked (not free, no hasAccess) or fails (403, S3 error), fall back to rendering page 1 as a PDF from its SVG thumbnail. Defaults to false. Only appli… |
| format | string | – | Download format. Defaults to pdf. |
| output_path | string | – | If set, download the file bytes for the chosen format to this local path (parent dirs created). Omit to just resolve the official URL. |
| score_id | string | – | Numeric score id (with user_id). |
| url | string | – | A musescore.com score URL or /user/<id>/scores/<id> path. Provide this OR user_id + score_id. |
| user_id | string | – | Numeric uploader id (with score_id). |
No output schema declared.
No examples provided.
musescore_fetch_svgs Fetch a score’s page SVGs to a directory ~231
Download a score’s per-page render SVGs (from musescore.com/static) into output_dir as page_<n>.svg. Pairs with musescore_svg_to_pdf. Page 1 is always rendered (it is the score’s public thumbnail, so paid scores work too); multi-page scores succeed and the result carries pagesRendered/pagesTotal/truncated (truncated:true means pages 2+ are gated behind a protected API).
| Name | Type | Req | Description |
|---|---|---|---|
| output_dir | string | yes | Local directory to write page_<n>.svg into. Created if missing. |
| pages | array | – | 1-based page numbers to fetch. Only page 1 is available locally (pages 2+ are gated behind a protected API); requesting any other page errors. Defaults to page 1. |
| score_id | string | – | Numeric score id (with user_id). |
| url | string | – | A musescore.com score URL or /user/<id>/scores/<id> path. Provide this OR user_id + score_id. |
| user_id | string | – | Numeric uploader id (with score_id). |
No output schema declared.
No examples provided.
musescore_get_score Get MuseScore score metadata ~174
Fetch a single MuseScore score page and return its metadata: title, uploader/arranger, original composer(s), license, page/part counts, duration, measures, key, privacy, and upload/update dates. Identify the score by either a url (a musescore.com score URL or /user/<id>/scores/<id> path) or a user_id + score_id pair. Read-only; does not download the score (free-download eligibility is decided per-account at download time).
| Name | Type | Req | Description |
|---|---|---|---|
| score_id | string | – | Numeric score id (with user_id). |
| url | string | – | A musescore.com score URL or /user/<id>/scores/<id> path. Provide this OR user_id + score_id. |
| user_id | string | – | Numeric uploader id (with score_id). |
No output schema declared.
No examples provided.
musescore_get_session_context List all registered MuseScore sessions ~47
Return the full set of registered sessions plus the current `active_session_id`. When no sessions are registered, `sessions` is empty and `active_session_id` is null.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
musescore_healthcheck Verify the fetchproxy bridge end-to-end ~106
Round-trips a small public musescore.com URL (/robots.txt) through the fetchproxy bridge and returns diagnostics: the bridge's role (host/peer/null), port, version, the elapsed round-trip time, and a plain-English hint distinguishing 'bridge never came up' from 'extension not connected' from 'real musescore.com-side problem'. Call this when a real tool fails and you want to know which hop broke. Read-only, no auth required.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
musescore_register_session Register a signed-in MuseScore session ~156
Register (or refresh) an authenticated MuseScore session keyed by signed-in account identity. Re-registering the same `account_identity` updates the existing session rather than creating a duplicate. Returns the `session_id` to use when routing per-tool calls. The first registered session becomes the default `active_session_id`. Pass `mark_active: true` to make the newly-registered session active in the same call.
| Name | Type | Req | Description |
|---|---|---|---|
| account_identity | string | yes | Caller-supplied identifier for the signed-in account (typically the saved-account email). |
| auth_expires_at | string | – | Optional ISO timestamp at which the session expires. |
| mark_active | boolean | – | When true, immediately make the newly-registered session the active one. |
No output schema declared.
No examples provided.
musescore_score_to_pdf Resolve or create a MuseScore score PDF ~486
Resolve or create a PDF for a MuseScore score. If the score exposes an official PDF download and is free (is_free) or accessible (hasAccess), downloads the official PDF bytes to output_path (written: true, bytes, outputPath). Otherwise (incl. paid scores, or when the official download fails) fetches the page-1 render SVG — the score’s public thumbnail — and stitches it into output_path. The score is identified by a url (a musescore.com score URL or /user/<id>/scores/<id> path) or a user_id + score_id pair. Requires a signed-in MuseScore session. In mode "official", a view-free but Premium/purchase-gated download returns a structured {status:"gated", requiresPurchase, downloadUrl, scoreUrl, svgStitchAvailable} result rather than erroring.
| Name | Type | Req | Description |
|---|---|---|---|
| dpi | number | – | Deprecated/ignored — SVG-stitch conversion is now vector (no rasterisation). |
| mode | string | – | auto (default): the 3-tier fallback chain — official PDF (if entitled) → SVG-stitch PDF → PNG render → structured "gated". The result reports which tier won via `via` (official_pdf | svg_pdf | png_re… |
| output_path | string | yes | Local .pdf path to write. Parent directories are created. |
| pages | array | – | 1-based page numbers for SVG-stitch mode. Only page 1 is available locally (pages 2+ are gated); requesting any other page errors. Ignored when an official PDF is downloaded. Defaults to page 1. |
| score_id | string | – | Numeric score id (with user_id). |
| url | string | – | A musescore.com score URL or /user/<id>/scores/<id> path. Provide this OR user_id + score_id. |
| user_id | string | – | Numeric uploader id (with score_id). |
No output schema declared.
No examples provided.
musescore_search Search MuseScore sheet music ~289
Search musescore.com for sheet music. Returns score cards with id, title, uploader/arranger, original composer(s), instrumentation, page/part counts, duration, upload date, view/save counts, difficulty, and PRO/Official badges. Defaults to MuseScore's 'Free to view, play & download' facet (free_only=true); set free_only=false to search the whole catalog (most of which is paywalled for download). The free facet narrows results but does NOT guarantee a free account can download a given score — that is enforced at download time. Read-only.
| Name | Type | Req | Description |
|---|---|---|---|
| complexity | string | – | Difficulty facet. |
| free_only | boolean | – | Restrict to the "Free to view, play & download" facet. Defaults to true. |
| instrument | string | – | Instrument facet: a supported instrument name (e.g. piano, guitar, violin, flute, trombone, baritone, tuba, organ, bassoon, saxophone alto, euphonium, cornet, accordion, soprano, alto, voice), or a M… |
| page | integer | – | 1-based result page. Defaults to 1. |
| query | string | yes | Free-text search query. |
No output schema declared.
No examples provided.
musescore_set_active_session Set the active MuseScore session ~69
Switch which registered session subsequent tool calls route through by default. Pass a `session_id` previously returned by `musescore_register_session`. Tools that accept an explicit `session_id` parameter override this default per-call.
| Name | Type | Req | Description |
|---|---|---|---|
| session_id | string | yes | Session id to make active. |
No output schema declared.
No examples provided.
musescore_svg_to_pdf Convert local SVG files to PDF ~105
Convert local SVG or SVGZ files that already exist on disk into a PDF, one input file per page. Does not fetch files from MuseScore or any remote URL.
| Name | Type | Req | Description |
|---|---|---|---|
| dpi | number | – | Deprecated/ignored — conversion is now vector (no rasterisation). |
| output_path | string | yes | Local .pdf path to write. Parent directories are created. |
| svg_paths | array | yes | Local .svg or .svgz file paths, in page order. |
No output schema declared.
No examples provided.