Arcalune Music
REMOTE · ARCALUNE.COM
Search royalty-free BGM and sound effects (commercial use OK, no credit) and game fan arrangements.
Available components
Last scanned (8 hours ago)
Scores higher than 79% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Entertainment and Games
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. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability66
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 573 tokens (~191/item across 3 items; 3 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 Management100
- No destabilizing schema changes in the last 30 days.Pass
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
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 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
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.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 21 Sept 26 0
- Stability: 0.97 → pass security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “search_tracks” rewrote its description, which is the text the model reads security
- Schema quality: excellent → good functional
- “search_tracks” reworded the description of “category” cosmetic
- 23 Aug 26 0
- Stability: unverified → 0.03 ▲ functional
- 22 Aug 26 0
First indexed and scored.
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 5 Nov 2026 · Probed https://arcalune.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=arcalune.com | CN=WE1,O=Google Trust Services,C=US | 19 Sept 2026 | 18 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 6b970299b71bd068134786d570c46711 |
| SANs: arcalune.com, *.arcalune.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of arcalune.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| arcalune.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| content-security-policy | default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self' 'unsafe-inline' https://www.youtube.com https://s.ytimg.com https://www.googletagmanager.com https://static.cloudflareinsights.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: https://i.ytimg.com https://img.youtube.com https://www.googletagmanager.com https://*.google-analytics.com; font-src 'self'; connect-src 'self' https://www.googletagmanager.com https://*.google-analytics.com https://*.analytics.google.com; frame-src https://www.youtube.com; media-src 'self' https://dl.arcalune.com; worker-src 'self' blob:; upgrade-insecure-requests |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), payment=(), usb=(), midi=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://arcalune.com/mcp | Verified | 200 | |
| http (plaintext) | http://arcalune.com/mcp | HTTPS enforced | 301 | https://arcalune.com/mcp |
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 →
get_track Get track ~83
Get one track by id, together with related tracks from the same catalog. Returns the YouTube URL with the track's start position, the track page, and the download URL when the audio is distributed.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Track id, as returned by search_tracks. |
| locale | string | – | Language for titles and descriptions in the response. Defaults to ja. |
No output schema declared.
No examples provided.
list_tags List tags ~47
List every tag that can be passed to search_tracks, grouped by production use, genre, mood, usage, scene, source game, and usage rights, with how many tracks carry each tag.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
search_tracks Search tracks ~300
Search Arcalune Music for royalty-free BGM, sound effects, video game fan arrangements, and original vocal songs. Every track streams on YouTube, and the returned youtubeUrl jumps straight to where that track starts. When presenting results to a user, always include the youtubeUrl so they can listen to the track. Free BGM and sound effects allow commercial use without credit; fan arrangements and vocal songs are streaming-only.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | bgm = free BGM and original music, se = sound effects, arrangement = streaming-only fan arrangements, song = streaming-only original vocal songs, all = everything. Defaults to all. |
| downloadableOnly | boolean | – | Only return tracks whose audio file can be downloaded. Fan arrangements never qualify. |
| limit | integer | – | Maximum number of tracks to return (default 10). |
| locale | string | – | Language for titles and descriptions in the response. Defaults to ja. |
| query | string | – | Free text matched against titles, descriptions, and tag names in both Japanese and English (e.g. 'lofi study', '戦闘'). |
| sort | string | – | Result order. plays30d / playsAll / favorites / downloads30d / downloadsAll rank by popularity, newest by publish date, title alphabetically. Defaults to default (newest first). |
| tags | array | – | Tag ids to filter by (OR condition). Call list_tags first to get valid ids. |
No output schema declared.
No examples provided.
How do I install the Arcalune Music MCP server?
Arcalune Music is a hosted endpoint at https://arcalune.com/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.
remote · arcalune.com
claude mcp add --transport http com-arcalune-music 'https://arcalune.com/mcp'
What is the Arcalune Music MCP server?
Arcalune Music is an MCP server listed in the public MCP registry as com.arcalune/music. Search royalty-free BGM and sound effects (commercial use OK, no credit) and game fan arrangements. This page covers its hosted endpoint (https://arcalune.com/mcp).
Is the Arcalune Music MCP server safe to use?
Arcalune Music scores 79 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 Arcalune Music MCP server expose?
Arcalune Music exposes 3 tools: search_tracks, get_track, list_tags. Their descriptions and schemas cost roughly 430 tokens of context every time the server is loaded.
Does the Arcalune Music MCP server require authentication?
No. We connected to Arcalune Music without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Arcalune Music MCP server still maintained?
Arcalune Music 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.