# SK Telecom Puzzle Subway Congestion API

**Canonical:** https://apis.io/apis/sk-telecom/sk-telecom-puzzle-subway-congestion-api/  
**Provider:** SK Telecom — https://apis.io/providers/sk-telecom/  
**Base URL:** https://apis.openapi.sk.com/puzzle/subway  
**Documentation:** https://openapi.sk.com/products/detail?svcSeq=54

SK Telecom Puzzle Subway Congestion API is one of 15 APIs that [SK Telecom](https://apis.io/providers/sk-telecom/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Big Data, Transit, and Congestion. The published artifact set on APIs.io includes API documentation and rate-limit docs.

Congestion data for every station and train on Seoul metropolitan subway lines 1 through 9 and the Shinbundang Line, including a station metadata/search operation. Documented on the SK open API portal; no downloadable OpenAPI was published for this product at the time of review.

## Machine-readable artifacts (2)

- **Documentation** — https://openapi.sk.com/products/detail?svcSeq=54
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/sk-telecom/refs/heads/main/rate-limits/sk-telecom-rate-limits.yml

## Other SK Telecom APIs (12)

- [SK Telecom A.X TTS API](https://apis.io/apis/sk-telecom/sk-telecom-ax-tts-api/)
- [SK Telecom A. facecan API](https://apis.io/apis/sk-telecom/sk-telecom-facecan-api/)
- [SK Telecom Puzzle Place Congestion API](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-place-congestion-api/)
- [SK Telecom Puzzle Residence API](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-residence-api/)
- [SK Telecom META API](https://apis.io/apis/sk-telecom/sk-telecom-meta-api/)
- [SK Telecom OVS API](https://apis.io/apis/sk-telecom/sk-telecom-ovs-api/)
- [SK Telecom Geovision Floating Population API](https://apis.io/apis/sk-telecom/sk-telecom-geovision-api/)
- [SK Telecom Puzzle Domestic Travel API](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-travel-api/)
- [SK Telecom Puzzle Restaurant API](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-restaurant-api/)
- [SK Telecom Puzzle Academy API](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-academy-api/)
- [Passkey by SK Telecom API](https://apis.io/apis/sk-telecom/sk-telecom-passkey-api/)
- [SK Telecom T ID Login API](https://apis.io/apis/sk-telecom/sk-telecom-t-id-api/)

## Tags

Big Data, Transit, Congestion

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/sk-telecom/sk-telecom-puzzle-subway-congestion-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/sk-telecom/.