BAYCON website screenshot

BAYCON

BAYCON Inc. is a Seoul, South Korea-based mobile connectivity company, founded in 2018 and backed by 500 Global and Shorooq Partners (seed round, 2024). BAYCON operates a global data eSIM platform and a family of international communication apps: eSIM Easy (이심이지), which delivers multi-country data eSIM plans as a QR code within minutes of purchase; ModuCall (모두의 국제전화), affordable VoIP international calling that lets users place overseas calls using their domestic mobile plans; and BayTalk. The company partners with local network operators and global carrier infrastructure so international travelers and businesses can access local mobile networks without physical SIM cards, cut roaming costs, and stay connected across borders, and is expanding into travel content such as attraction tickets and transportation passes. BAYCON publishes consumer mobile apps rather than a public developer API surface.

BAYCON is profiled on the APIs.io network. Tagged areas include Company, eSIM, Telecommunications, Connectivity, and Travel.

BAYCON’s developer surface includes engineering blog, signup flow, and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub
9.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyeSIMTelecommunicationsConnectivityTravelVoIPMobileRoamingKorea

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 9.8/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.4 / 20
Commercial Clarity 2.6 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/baycon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Baycon Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp
SignUp

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: baycon
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/baycon.png
name: BAYCON
description: 'BAYCON Inc. is a Seoul, South Korea-based mobile connectivity company, founded in 2018 and backed by 500 Global
  and Shorooq Partners (seed round, 2024). BAYCON operates a global data eSIM platform and a family of international communication
  apps: eSIM Easy (이심이지), which delivers multi-country data eSIM plans as a QR code within minutes of purchase; ModuCall (모두의
  국제전화), affordable VoIP international calling that lets users place overseas calls using their domestic mobile plans; and
  BayTalk. The company partners with local network operators and global carrier infrastructure so international travelers
  and businesses can access local mobile networks without physical SIM cards, cut roaming costs, and stay connected across
  borders, and is expanding into travel content such as attraction tickets and transportation passes. BAYCON publishes consumer
  mobile apps rather than a public developer API surface.'
url: https://raw.githubusercontent.com/api-evangelist/baycon/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- eSIM
- Telecommunications
- Connectivity
- Travel
- VoIP
- Mobile
- Roaming
- Korea
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://baycon.co.kr
- type: Blog
  url: https://blog.naver.com/esimeasy
- type: SignUp
  url: https://esimeasy.co.kr
- type: DomainSecurity
  url: security/baycon-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence