21 Market website screenshot

21 Market

21 Market is the API Evangelist network profile for 주식회사 21세기전파상 (21st Century Electronics Shop Co., Ltd.), a South Korean consumer-electronics resale company that operates the Repercent (리퍼센트) service at repercent.com. Repercent buys used smartphones and mobile devices — iPhone, Galaxy, tablets, and laptops — from individual sellers, providing instant online price quotes, fast payment, and a simple pickup/logistics flow for secondhand device trade-in. The company is a 500 Global portfolio company and was surfaced into the network as a venture portfolio lead. As of this pass the company publishes no public developer program, API, or documentation surface; this profile captures verified company identity, its live web properties, and probed domain-security posture.

21 Market is profiled on the APIs.io network. Tagged areas include Company, Consumer Electronics, Ecommerce, Resale, and Secondhand.

🌐 Visit website 📡 Source on GitHub
11.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyConsumer ElectronicsEcommerceResaleSecondhandMobile DevicesTrade-InSouth Korea

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 11.0/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 4.2 / 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/21-market: 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.

21 Market Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: 21-market
name: 21 Market
description: 21 Market is the API Evangelist network profile for 주식회사 21세기전파상 (21st Century Electronics Shop Co., Ltd.), a
  South Korean consumer-electronics resale company that operates the Repercent (리퍼센트) service at repercent.com. Repercent
  buys used smartphones and mobile devices — iPhone, Galaxy, tablets, and laptops — from individual sellers, providing instant
  online price quotes, fast payment, and a simple pickup/logistics flow for secondhand device trade-in. The company is a 500
  Global portfolio company and was surfaced into the network as a venture portfolio lead. As of this pass the company publishes
  no public developer program, API, or documentation surface; this profile captures verified company identity, its live web
  properties, and probed domain-security posture.
url: https://raw.githubusercontent.com/api-evangelist/21-market/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
x-legal-name: 주식회사 21세기전파상
x-brand: Repercent (리퍼센트)
x-ceo: 박영준 (Park Young-jun)
x-business-registration: 854-81-01496
x-mail-order-registration: 서울서초-0993
x-phone: 1544-2980
x-country: KR
x-no-api-surface: 'true'
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-17'
image: https://repercent.com/img/og/default.webp
tags:
- Company
- Consumer Electronics
- Ecommerce
- Resale
- Secondhand
- Mobile Devices
- Trade-In
- South Korea
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/21-market-domain-security.yml
- type: Website
  url: https://repercent.com
- type: Website
  url: https://21market.kr
- type: TermsOfService
  url: https://repercent.com/policy?idx=1
- type: PrivacyPolicy
  url: https://repercent.com/policy?idx=0
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence