Smule

Smule is an American consumer music technology company whose flagship social singing and karaoke app lets people perform solos, duets, and group songs and collaborate with other singers around the world in real time. Launched on iOS in 2012 and on Android in 2013 under the name "Sing! Karaoke," the app grew to tens of millions of monthly active users. Smule Inc. is headquartered in San Francisco and is backed by Bessemer Venture Partners and Shasta Ventures. Smule publishes no official public developer API; this profile tracks the company for the API Evangelist network.

Smule is profiled on the APIs.io network. Tagged areas include Company, Consumer, Music, Karaoke, and Singing.

Smule’s developer surface includes engineering blog and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub

5.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Consumer MusicKaraokeSingingMobile Social Entertainment

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 5.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.5 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 0 / 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

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.

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Security Posture 1

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

Smule Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: smule
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/smule.png
name: Smule
description: Smule is an American consumer music technology company whose flagship social singing and karaoke app lets people
  perform solos, duets, and group songs and collaborate with other singers around the world in real time. Launched on iOS
  in 2012 and on Android in 2013 under the name "Sing! Karaoke," the app grew to tens of millions of monthly active users.
  Smule Inc. is headquartered in San Francisco and is backed by Bessemer Venture Partners and Shasta Ventures. Smule publishes
  no official public developer API; this profile tracks the company for the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/smule/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bessemer-venture-partners
- shasta-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Consumer
- Music
- Karaoke
- Singing
- Mobile
- Social
- Entertainment
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/smule-domain-security.yml
- type: Website
  url: https://www.smule.com/
- type: Blog
  url: https://blog.smule.com/
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1

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