# SK Telecom **Canonical:** https://apis.io/providers/sk-telecom/ **Website:** https://www.sktelecom.com/ **APIs profiled:** 15 SK Telecom Co., Ltd. is South Korea's largest mobile network operator, headquartered at SK T-Tower in Jung-gu, Seoul, and the telecom arm of SK Group. It runs the country's largest 5G and LTE network, sells fixed broadband and IPTV through subsidiary SK Broadband, operates the T world retail and care channel, and has repositioned itself as an "AI company" around its A.X sovereign Korean LLM family, the NUGU voice assistant, and the A. (A dot) assistant. Its position in the telecom value chain is that of a facilities-based incumbent carrier: it owns the radio access network, spectrum, SIM base, and identity rails that the rest of the Korean digital economy authenticates against. Its API posture is split in an unusual way. SK Telecom does run a genuine, self-serve public developer portal — SK open API at openapi.sk.com, operated by SK Telecom Co., Ltd. — but what it publishes there is AI, big-data and mobility product APIs (speech synthesis, face recognition, congestion and floating-population analytics, video analysis), not network APIs. The legacy T developers subdomains developer.sktelecom.com and developers.sktelecom.com both resolve in DNS to 211.188.149.18 and refuse connections on port 443 — a dead developer programme with dangling hostnames. On the network-API side SK Telecom is a named CAMARA participant and appears in the CAMARA landscape as an operator, has an organisation page in GSMA's Open Gateway directory, signed a domestic MoU with KT and LG Uplus in October 2024 to standardise six network APIs through Korea's TTA, endorsed the Bridge Alliance API Exchange, and signed an MoU with Aduna through subsidiary SK telink in September 2025 — but no CAMARA endpoint (Number Verification, SIM Swap, KYC Match, Quality on Demand) is callable from any SK Telecom-operated developer portal. Developers who want SK Telecom network capability reach it through aggregators — Bridge Alliance BAEx on Singtel's Paragon platform, surfaced through Nokia's Network as Code developer portal, or Aduna — not from SK Telecom directly. ## Kin Score — 44.9 / 100 (developing) Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 44.9). | Facet | Score | |---|---| | Discoverability | 83.3 | | Contract Quality | 51.3 | | Governance | 16.7 | | Contract Governance | 16.7 | | Operational Transparency | 26.3 | | Developer Ergonomics | 47.0 | | Commercial Clarity | 34.2 | | Access Clarity | 34.2 | Regulatory layer — **Telecommunications**: 43.1 (matched via tags). ## Agent readiness — 53.2 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | verified | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | verified | | Rate Limit Signal | documented | | Event Surface Described | no | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## APIs (15) - **SK Telecom A.X TTS API** — Korean text-to-speech built on SK Telecom's own DNN speech-synthesis models and voice database, operated by SKT's speech synthesis technology team. Three documented operations —... - **SK Telecom A. facecan API** — Face recognition and analysis API (published as "NUGU facecan"). Build a per-group, per-subject face database and then detect, recognize and extract landmarks from submitted JPE... - **SK Telecom Puzzle Place Congestion API** — Place congestion and visitor analytics derived from SK Telecom mobile network data, keyed to TMAP points of interest and to commercial AREA identifiers. Sixteen documented opera... - **SK Telecom Puzzle Residence API** — Apartment-complex resident profile analytics derived from SK Telecom network data. Five documented operations returning the apartment complex list plus monthly statistics on res... - **SK Telecom META API** — Video and image analysis AI served from SK Telecom's sigmeta service. Seven documented operations covering an asynchronous analyzer lifecycle (create analyzer, upload file, star... - **SK Telecom OVS API** — OVS is SK Telecom's road-event alerting service. Twelve documented operations covering customer company lookup, registration/lookup/deletion of target devices, broadcast of aler... - **SK Telecom Geovision Floating Population API** — Geovision is SK Telecom's flagship big-data API service, estimating floating population (footfall) from mobile network signalling. Documented on the SK open API portal; no downl... - **SK Telecom Puzzle Subway Congestion API** — 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... - **SK Telecom Puzzle Domestic Travel API** — Domestic travel analytics — traveller volume by destination, in-region dwell time, and traveller characteristics (gender, age band, companion type). Documented on the SK open AP... - **SK Telecom Puzzle Restaurant API** — Restaurant rankings and analysis derived from call-volume statistics on SK Telecom's network. Documented on the SK open API portal; no downloadable OpenAPI was published for thi... - **SK Telecom Puzzle Academy API** — Private academy (hagwon) rankings and analysis derived from call-volume statistics on SK Telecom's network. Documented on the SK open API portal; no downloadable OpenAPI was pub... - **Passkey by SK Telecom API** — SK Telecom's passwordless passkey authentication system for third-party services. The product page links an integration guide at api.passkey-sktelecom.com/docs/api.html; from ou... - **SK Telecom T ID Login API** — T ID is SK Telecom's federated identity service, the single sign-on used across SK Telecom and SK affiliate services with roughly 15 million registered users. Third parties inte... - **NUGU Developers** — Developer centre for NUGU, SK Telecom's Korean-language voice assistant platform, where third parties build and publish NUGU "plays". The portal is a single-page application; no... - **SK Telecom QRNG** — Quantum random number generation security chip and solution from SK Telecom, listed in the Authentication/Security category of the SK open API portal. Listed as a product rather... ## MCP servers (1) - **Five live MCP endpoints on the SK Telecom documentation hubs (ReadMe-provided, tools/list auth-gated); no MCP server for the SK open API gateway itself** ## Agentic access (1) - **Sk Telecom Agentic Access** — 55 operations · 20 acting ## Security (2) - **Sk Telecom Authentication** — apiKey · 2 schemes - **Sk Telecom Domain Security** — TLSv1.3 · DMARC ## Tags Telecommunications, South Korea, Mobile Network Operator, Network APIs, CAMARA, Open Gateway, 5G, Identity Verification, SIM Swap, Artificial Intelligence, Location, Big Data --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sk-telecom/). Scores are computed from the provider's own public artifacts under a published rubric.