SK Telecom
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.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles SK Telecom the way a machine reads it — 20 machine-readable artifacts across 15 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — SK Telecom scores 40.1/100 (thin), with a separate agent-readiness read of 76/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile SK Telecom
Each block below is one kind of artifact we hold for SK Telecom. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 15
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
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...
Scroll within the panel for all 15 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Sk Telecom Rate Limits
RATE LIMITSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for SK Telecom — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 3
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 6
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 8
Properties that don't map to a standard resource type
Scroll within the panel for all 8 ·
← All providers · Data indexed from github.com/api-evangelist/sk-telecom · machine-readable index on apis.io