LRCMux

LRCMux provides a free synchronized lyrics API that delivers LRC, word‑by‑word, and plain‑text lyrics for any song. Powered by multiple providers, the service requires no API key and offers easy integration for developers building music‑related applications.

LRCMux publishes 3 API contracts indexed on the APIs.io network: Compatibility API, Lyrics API, and Meta API. Tagged areas include Lyrics, Music, API, Free, and NoAuth.

The LRCMux catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

LRCMux’s developer surface includes documentation, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.0/100 emerging Agent 21/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 Agent Skills

Lyrics MusicAPIFreeNoAuth

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 25.0/100 · emerging

Contract Quality 10.7 / 21

Developer Ergonomics 3.5 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 0 / 3

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/.

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<a href="https://apis.io/providers/lrcmux/"><img src="https://apis.io/badge/lrcmux/card.svg" alt="LRCMux on APIs.io — Kin Score by API Evangelist"></a>

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
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)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 20.7 — up to +15.9 composite points
Operational Transparency scores 0.0 — up to +13.0 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/lrcmux/apis.yml: open an issue on github.com/api-evangelist/lrcmux 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 →

APIs 3

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

LRCMux Compatibility API

The Compatibility API from LRCMux — 3 operation(s) for compatibility.

LRCMux Lyrics API

The Lyrics API from LRCMux — 1 operation(s) for lyrics.

LRCMux Meta API

The Meta API from LRCMux — 1 operation(s) for meta.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

get-lyrics

AGENT SKILL

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Lrcmux Context

18 classes · 51 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

LRCMux API Rules

11 rules · 10 errors 1 info

SPECTRAL

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

JSONResponse

3 properties

JSON SCHEMA

KpoeResponse

5 properties

JSON SCHEMA

LrclibResponse

9 properties

JSON SCHEMA

StatsOutputBody

3 properties

JSON SCHEMA

Security Posture 1

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

Lrcmux Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Lrcmux Agentic Access

5 operations

5 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source

Source

Source (apis.yml)

aid: lrcmux
name: LRCMux
image: https://lrcmux.dev/logo.png
description: LRCMux provides a free synchronized lyrics API that delivers LRC, word‑by‑word, and plain‑text lyrics for any
  song. Powered by multiple providers, the service requires no API key and offers easy integration for developers building
  music‑related applications.
url: https://artifacts.apis.io/lrcmux/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Lyrics
- Music
- API
- Free
- NoAuth
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/lrcmux-agentic-access.yml
- type: Spectral
  url: rules/lrcmux-rules.yml
- type: JSONLD
  url: json-ld/lrcmux-context.jsonld
- type: Vocabulary
  url: vocabulary/lrcmux-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/lrcmux-data-model.yml
- type: ErrorCatalog
  url: errors/lrcmux-problem-types.yml
- type: Conformance
  url: conformance/lrcmux-conformance.yml
- type: Hosts
  url: hosts/lrcmux-hosts.yml
- type: Vendors
  url: vendors/lrcmux-vendors.yml
- type: DomainSecurity
  url: security/lrcmux-domain-security.yml
- type: Website
  url: https://lrcmux.dev/
- type: Documentation
  url: https://lrcmux.dev/docs
- type: Source
  url: https://github.com/f1nniboy/lrcmux
- type: Support
  url: https://matrix.to/#/#lrcmux:oss.zone
apis:
- aid: lrcmux:lrcmux-compatibility-api
  name: LRCMux Compatibility API
  description: The Compatibility API from LRCMux — 3 operation(s) for compatibility.
  humanURL: https://lrcmux.dev/docs
  baseURL: https://api.lrcmux.dev
  tags:
  - Compatibility
  properties:
  - type: OpenAPI
    url: openapi/lrcmux-compatibility-api-openapi.yml
  - type: JSONSchema
    url: json-schema/lrcmux-lrclib-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-kpoe-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-jsonresponse-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-stats-output-body-schema.json
- aid: lrcmux:lrcmux-lyrics-api
  name: LRCMux Lyrics API
  description: The Lyrics API from LRCMux — 1 operation(s) for lyrics.
  humanURL: https://lrcmux.dev/docs
  baseURL: https://api.lrcmux.dev
  tags:
  - Lyrics
  properties:
  - type: OpenAPI
    url: openapi/lrcmux-lyrics-api-openapi.yml
  - type: JSONSchema
    url: json-schema/lrcmux-lrclib-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-kpoe-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-jsonresponse-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-stats-output-body-schema.json
- aid: lrcmux:lrcmux-meta-api
  name: LRCMux Meta API
  description: The Meta API from LRCMux — 1 operation(s) for meta.
  humanURL: https://lrcmux.dev/docs
  baseURL: https://api.lrcmux.dev
  tags:
  - Meta
  properties:
  - type: OpenAPI
    url: openapi/lrcmux-meta-api-openapi.yml
  - type: JSONSchema
    url: json-schema/lrcmux-lrclib-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-kpoe-response-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-jsonresponse-schema.json
  - type: JSONSchema
    url: json-schema/lrcmux-stats-output-body-schema.json
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

LRCMux API — frequently asked questions

Does LRCMux have an API?

Yes. APIs.io lists 3 APIs from LRCMux, including LRCMux Compatibility API, LRCMux Lyrics API and LRCMux Meta API.

Is there an OpenAPI specification for the LRCMux API?

Yes. APIs.io indexes 3 OpenAPI specifications for LRCMux, each linked for download from this page.

Is the LRCMux API ready for AI agents?

LRCMux has a Kin Score of 25.0 out of 100 (emerging) and an Agent Readiness score of 21.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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