io.github.asume21/music-theory-mcp
NPM · MUSIC-THEORY-MCP · SCANNED SEP 20
Scales, chords, progressions, key detection, and genre intelligence for your AI. No API keys needed.
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 → Why this is hard to 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
- 31 of 96 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 172 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability78
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1151 tokens (~88/item across 13 items; 13 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management93
- Stability observed for 28 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage97
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 92% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 13 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the io.github.asume21/music-theory-mcp server?
io.github.asume21/music-theory-mcp runs locally as an npm package, launched with npx -y music-theory-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · music-theory-mcp
claude mcp add asume21-music-theory-mcp -- npx -y music-theory-mcp
{
"mcpServers": {
"asume21-music-theory-mcp": {
"command": "npx",
"args": [
"-y",
"music-theory-mcp"
]
}
}
} {
"servers": {
"asume21-music-theory-mcp": {
"command": "npx",
"args": [
"-y",
"music-theory-mcp"
]
}
}
} codex mcp add asume21-music-theory-mcp -- npx -y music-theory-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"asume21-music-theory-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"music-theory-mcp"
],
"enabled": true
}
}
} openclaw mcp add asume21-music-theory-mcp --command npx --arg -y --arg music-theory-mcp
mcp_servers:
asume21-music-theory-mcp:
command: "npx"
args: ["-y", "music-theory-mcp"] {
"McpServers": {
"asume21-music-theory-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"music-theory-mcp"
]
}
}
} assistant mcp add asume21-music-theory-mcp -t stdio -c npx -a -y music-theory-mcp
{
"mcpServers": {
"asume21-music-theory-mcp": {
"command": "npx",
"args": [
"-y",
"music-theory-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.
- 19 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 16 Sept 26 −3
- Stability: pass → 0.80 functional
- 15 Sept 26 0
- Stability: 0.97 → pass security
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 10 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 9 Sept 26 −3
- Stability: pass → 0.80 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 20 Sept 2026 · Analysed npm/music-theory-mcp@1.0.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 96 packages
| Packages resolved | 96 |
|---|---|
| Stale | 31 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
detect_key ~86
Detect the most likely musical key from a set of observed notes. Returns top candidates with confidence scores. Useful for analyzing melodies or MIDI data. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| notes | array | yes | Array of note names observed in the piece (e.g., ["C", "D", "E", "F", "G", "A", "B"]) |
No output schema declared.
No examples provided.
get_chord ~108
Get the notes and intervals for any chord type. Supports triads, 7ths, 9ths, 11ths, 13ths, sus, aug, dim, and more (22+ chord types). [FREE]
| Name | Type | Req | Description |
|---|---|---|---|
| root | string | yes | Root note (e.g., "C", "F#", "Bb") |
| type | string | yes | Chord type (e.g., "major", "minor", "dom7", "maj7", "sus2") |
No output schema declared.
No examples provided.
get_diatonic_chords ~71
Get all 7 diatonic chords in a key with Roman numerals, chord symbols, and notes. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| key | string | yes | Key root note (e.g., "C", "Ab") |
| mode | string | – | – |
No output schema declared.
No examples provided.
get_genre_profile ~145
Get full genre intelligence: common chord progressions, scales, BPM range, instruments, rhythmic feel, swing amount, common keys, and mood descriptors. Supports trap, boom_bap, drill, lofi_hiphop, rnb, pop, afrobeats, reggaeton, jazz, edm, gospel. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| genre | string | yes | Genre name (e.g., "trap", "boom_bap", "lofi_hiphop", "rnb", "drill", "afrobeats", "jazz", "edm", "pop", "reggaeton", "gospel") |
No output schema declared.
No examples provided.
get_genre_rhythms ~63
Get common drum/rhythm patterns for a genre. Returns kick, snare, and hi-hat step patterns ready to load into a beat maker. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| genre | string | yes | Genre name |
No output schema declared.
No examples provided.
get_interval ~50
Get the musical interval name between two notes (e.g., C to G = P5). [FREE]
| Name | Type | Req | Description |
|---|---|---|---|
| note_a | string | yes | First note |
| note_b | string | yes | Second note |
No output schema declared.
No examples provided.
get_scale ~114
Get the notes, intervals, and modes for any musical scale. Supports 20+ scale types including major, minor, pentatonic, blues, dorian, phrygian, lydian, mixolydian, and more. [FREE]
| Name | Type | Req | Description |
|---|---|---|---|
| root | string | yes | Root note (e.g., "C", "F#", "Bb") |
| type | string | yes | Scale type (e.g., "major", "natural_minor", "pentatonic_minor", "blues", "dorian") |
No output schema declared.
No examples provided.
identify_chord ~65
Identify a chord from a set of note names. Returns all possible interpretations with root, type, and inversion. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| notes | array | yes | Array of note names (e.g., ["C", "E", "G"]) |
No output schema declared.
No examples provided.
resolve_progression ~108
Resolve a Roman numeral chord progression (e.g., I-V-vi-IV) to actual chord names and notes in a given key. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| key | string | yes | Key root note (e.g., "C", "F#") |
| mode | string | – | Major or minor key |
| numerals | array | yes | Chord progression as Roman numerals (e.g., ["I", "V", "vi", "IV"]) |
No output schema declared.
No examples provided.
suggest_genre ~113
Suggest a genre based on BPM, key, mood, or scale. Returns ranked matches with reasoning. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| bpm | number | – | Beats per minute |
| key | string | – | Musical key (e.g., "C", "F#") |
| mood | string | – | Mood keyword (e.g., "dark", "chill", "energetic") |
| scale | string | – | Scale type (e.g., "natural_minor", "dorian") |
No output schema declared.
No examples provided.
suggest_next_chord ~86
Suggest what chord should come next based on common voice leading tendencies. Given a current chord and key, returns ranked suggestions. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| current_numeral | string | yes | Current chord as Roman numeral (e.g., "V", "vi") |
| key | string | yes | Key root note |
| mode | string | – | – |
No output schema declared.
No examples provided.
transpose_note ~71
Transpose a single note up or down by a number of semitones. [FREE]
| Name | Type | Req | Description |
|---|---|---|---|
| note | string | yes | Note to transpose (e.g., "C", "F#") |
| semitones | number | yes | Number of semitones to shift (positive = up, negative = down) |
No output schema declared.
No examples provided.
transpose_progression ~71
Transpose an entire chord progression by a number of semitones. Takes an array of {root, type} objects. [PRO — requires CODEDSWITCH_API_KEY]
| Name | Type | Req | Description |
|---|---|---|---|
| chords | array | yes | Array of chords to transpose |
| semitones | number | yes | Semitones to shift |
No output schema declared.
No examples provided.
What is the io.github.asume21/music-theory-mcp server?
io.github.asume21/music-theory-mcp is listed in the public MCP registry as io.github.asume21/music-theory-mcp. Scales, chords, progressions, key detection, and genre intelligence for your AI. No API keys needed. This page covers its npm package (music-theory-mcp).
Is the io.github.asume21/music-theory-mcp server safe to use?
io.github.asume21/music-theory-mcp scores 78 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 io.github.asume21/music-theory-mcp server expose?
io.github.asume21/music-theory-mcp exposes 13 tools: get_scale, get_chord, identify_chord, detect_key, resolve_progression, and 8 more. Their descriptions and schemas cost roughly 1,151 tokens of context every time the server is loaded.
Is the io.github.asume21/music-theory-mcp server still maintained?
io.github.asume21/music-theory-mcp 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 io.github.asume21/music-theory-mcp server under?
io.github.asume21/music-theory-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.