# 21 Market

**Canonical:** https://apis.io/providers/21-market/  
**Website:** https://repercent.com  
**APIs profiled:** 0

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.

## Kin Score — 9.2 / 100 (minimal)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 9.2).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **21 Market Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Consumer Electronics, E-Commerce, Resale, Secondhand, Mobile Devices, Trade-In, South Korea

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/21-market/). Scores are computed from the provider's own public artifacts under a published rubric.