Arcalune Music

Arcalune Music is a Japanese‑origin online music library offering original compositions, fan‑arranged game tracks, and royalty‑free background music and sound effects. All tracks are available for free streaming and download, suitable for use in videos, live streams, and game projects. The site provides high‑quality MP3 files under Creative Commons licensing, with multilingual navigation (Japanese, English, Spanish, Portuguese, Hindi, Indonesian, French).

Arcalune Music is listed with 2 APIs on the APIs.io network. Tagged areas include Music, Free BGM, Sound Effects, Japanese, and Creative Commons.

The Arcalune Music catalog on APIs.io includes 1 Spectral governance ruleset.

🌐 Visit website 📡 Profile data on GitHub

17.5/100 emerging Agent 20/100 agent aware Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessOpen

2 APIs 1 MCP Servers

MusicFree BGMSound Effects Japanese Creative Commons

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 17.5/100 · emerging

Contract Quality 2.0 / 21

Developer Ergonomics 2.7 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.0 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/arcalune-com/"><img src="https://apis.io/badge/arcalune-com/card.svg" alt="Arcalune Music on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 9.4 — up to +22.7 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 16.0 — up to +16.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/arcalune-com/apis.yml: open an issue on github.com/api-evangelist/arcalune-com to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Arcalune Music MCP

Arcalune Music provides a Machine-Callable Protocol (MCP) for searching tracks, retrieving track details, and listing tags.

Arcalune Music API

Arcalune Music API as documented publicly: 1 operations. Contract generated from the documentation by API Evangelist (2026-11-01); not the provider's own document.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Arcalune Music MCP Server

Remote MCP server at arcalune.com.

MCP SERVER

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Arcalune Music API Rules

27 rules · 25 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Arcalune Com Authentication

0 schemes

SECURITY

Arcalune Com Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Arcalune Com Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Vocabulary

Vocabulary

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: arcalune-com
name: Arcalune Music
description: Arcalune Music is a Japanese‑origin online music library offering original compositions, fan‑arranged game tracks,
  and royalty‑free background music and sound effects. All tracks are available for free streaming and download, suitable
  for use in videos, live streams, and game projects. The site provides high‑quality MP3 files under Creative Commons licensing,
  with multilingual navigation (Japanese, English, Spanish, Portuguese, Hindi, Indonesian, French).
url: https://artifacts.apis.io/arcalune-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-02'
  method: derived
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Music
- Free BGM
- Sound Effects
- Japanese
- Creative Commons
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://arcalune.com/og-card-v1.png
common:
- type: Spectral
  url: rules/arcalune-com-rules.yml
- type: Vocabulary
  url: vocabulary/arcalune-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Conformance
  url: conformance/arcalune-com-conformance.yml
- type: LLMsTxt
  url: llms/arcalune-com-llms.txt
- type: MCPServer
  url: mcp/arcalune-com-mcp.yml
- type: Hosts
  url: hosts/arcalune-com-hosts.yml
- type: Vendors
  url: vendors/arcalune-com-vendors.yml
- type: PrivacyPolicy
  url: https://arcalune.com/privacy
- type: Newsroom
  url: https://arcalune.com/se/news
- type: DeveloperPortal
  url: https://arcalune.com/developers
- type: DomainSecurity
  url: security/arcalune-com-domain-security.yml
- type: Website
  url: https://arcalune.com/
apis:
- name: Arcalune Music MCP
  description: Arcalune Music provides a Machine-Callable Protocol (MCP) for searching tracks, retrieving track details, and
    listing tags.
  humanURL: https://arcalune.com/developers
  baseURL: https://arcalune.com
  mcp:
    url: openapi/arcalune-com-mcp.json
  aid: arcalune-com:arcalune-music-mcp
- aid: arcalune-com:arcalune-com-api
  name: Arcalune Music API
  description: 'Arcalune Music API as documented publicly: 1 operations. Contract generated from the documentation by API
    Evangelist (2026-11-01);

    not the provider''s own document.'
  humanURL: https://arcalune.com/developers
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/arcalune-com-openapi-generated.yml
    x-provenance: generated
x-enrichment:
  date: '2026-11-01'
  status: nochange
  artifacts_added: 0
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Arcalune Music API — frequently asked questions

Does Arcalune Music have an API?

Yes. APIs.io lists 2 APIs from Arcalune Music, including Arcalune Music MCP and Arcalune Music API.

Is there an OpenAPI specification for the Arcalune Music API?

Yes. APIs.io indexes 1 OpenAPI specification for Arcalune Music, each linked for download from this page.

How do I authenticate with the Arcalune Music API?

Arcalune Music documents its authentication (0 schemes). The details are profiled on APIs.io as Arcalune Com Authentication.

Does Arcalune Music have an MCP server?

Yes. APIs.io lists 1 MCP server for Arcalune Music: Remote MCP server at arcalune.com.

Is the Arcalune Music API ready for AI agents?

Arcalune Music has a Kin Score of 17.5 out of 100 (emerging) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-02.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/arcalune-com"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/arcalune-com/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/arcalune-com/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.