aid: sk-telecom url: https://raw.githubusercontent.com/api-evangelist/sk-telecom/refs/heads/main/apis.yml name: SK Telecom kind: company description: >- 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. image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg tags: - Telecommunications - South Korea - Mobile Network Operator - Network APIs - CAMARA - Open Gateway - 5G - Identity Verification - SIM Swap - Artificial Intelligence - Location - Big Data created: '2026-07-25' modified: '2026-07-25' specificationVersion: '0.19' apis: - aid: sk-telecom:sk-telecom-ax-tts-api name: SK Telecom A.X TTS API description: >- 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 — list TTS models, list the voices a model supports, and synthesize speech (with an optional timestamped variant). Authenticated with an appKey header issued from the SK open API dashboard. humanURL: https://openapi.sk.com/products/detail?svcSeq=67 baseURL: https://apis.openapi.sk.com/axtts tags: - Artificial Intelligence - Speech - Text to Speech - Korean properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=67 - type: APIReference url: https://ax-tts-skopenapi.readme.io/reference/text-to-speech-tts - type: OpenAPI url: openapi/sk-telecom-ax-tts-openapi.json - type: GettingStarted url: https://ax-tts-skopenapi.readme.io/reference/getting-started-with-ax-tts-api name: Getting Started With A.X TTS API - type: Overlay url: overlays/sk-telecom-ax-tts-overlay.yaml - type: LLMsTxt url: llms/sk-telecom-ax-tts-llms.txt name: llms.txt published at https://ax-tts-skopenapi.readme.io/llms.txt - type: AgentSkill url: skills/sk-telecom-synthesize-korean-speech.md name: Synthesize Korean speech with SK Telecom A.X TTS - aid: sk-telecom:sk-telecom-facecan-api name: SK Telecom A. facecan API description: >- 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 JPEG images. Nine documented operations covering group, subject and face CRUD plus detect, recognize and landmark inference. Supported input 320x240 to 3840x2160, JPG/JPEG under 2 MB. humanURL: https://openapi.sk.com/products/detail?svcSeq=50 baseURL: https://apis.openapi.sk.com/nugufacecan tags: - Artificial Intelligence - Computer Vision - Face Recognition - Biometrics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=50 - type: APIReference url: https://nugufacecan-skopenapi.readme.io/reference/face-detect-1 - type: OpenAPI url: openapi/sk-telecom-facecan-openapi.json - type: Overlay url: overlays/sk-telecom-facecan-overlay.yaml - type: LLMsTxt url: llms/sk-telecom-nugufacecan-llms.txt name: llms.txt published at https://nugufacecan-skopenapi.readme.io/llms.txt - type: ErrorCatalog url: https://nugufacecan-skopenapi.readme.io/reference/error-codes name: A. facecan Error Codes (41 codes, captured in errors/sk-telecom-error-codes.yml) - type: AgentSkill url: skills/sk-telecom-enroll-and-recognize-a-face.md name: Enroll and recognize a face with SK Telecom A. facecan - aid: sk-telecom:sk-telecom-puzzle-place-congestion-api name: SK Telecom Puzzle Place Congestion API description: >- 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 operations covering POI/area metadata, real-time congestion, hourly congestion statistics, and daily visitor counts, travel distance and segment statistics. humanURL: https://openapi.sk.com/products/detail?svcSeq=56 baseURL: https://apis.openapi.sk.com/puzzle/place tags: - Big Data - Location - Congestion - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=56 - type: APIReference url: https://puzzle-skopenapi.readme.io/reference/poicongestionrltm - type: OpenAPI url: openapi/sk-telecom-puzzle-place-congestion-openapi.json - type: Overlay url: overlays/sk-telecom-puzzle-place-congestion-overlay.yaml - type: LLMsTxt url: llms/sk-telecom-puzzle-llms.txt name: llms.txt published at https://puzzle-skopenapi.readme.io/llms.txt - type: RateLimits url: rate-limits/sk-telecom-rate-limits.yml name: Published Free-plan daily quotas (100/day and 1,000/day by API group) - type: AgentSkill url: skills/sk-telecom-read-place-congestion.md name: Read place and commercial-area congestion from SK Telecom Geovision Puzzle - aid: sk-telecom:sk-telecom-puzzle-residence-api name: SK Telecom Puzzle Residence API description: >- Apartment-complex resident profile analytics derived from SK Telecom network data. Five documented operations returning the apartment complex list plus monthly statistics on resident age distribution, demographic features, category behaviour and subway usage rate, keyed on the Korean kaptCode apartment identifier. humanURL: https://openapi.sk.com/products/detail?svcSeq=66 baseURL: https://apis.openapi.sk.com/puzzle/residence tags: - Big Data - Demographics - Housing - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=66 - type: APIReference url: https://puzzle-skopenapi.readme.io/reference/apts - type: OpenAPI url: openapi/sk-telecom-puzzle-residence-openapi.json - type: Overlay url: overlays/sk-telecom-puzzle-residence-overlay.yaml - aid: sk-telecom:sk-telecom-meta-api name: SK Telecom META API description: >- Video and image analysis AI served from SK Telecom's sigmeta service. Seven documented operations covering an asynchronous analyzer lifecycle (create analyzer, upload file, start analyzer, get result) for golf swing analysis and pose estimation, plus licence plate recognition. Uploads go to a temporary presigned S3 URL returned by the create call. humanURL: https://openapi.sk.com/ baseURL: https://apis.openapi.sk.com/sigmeta tags: - Artificial Intelligence - Computer Vision - Video Analysis properties: - type: Documentation url: https://openapi.sk.com/ - type: APIReference url: https://meta-skopenapi.readme.io/reference/lpr-1 - type: OpenAPI url: openapi/sk-telecom-meta-openapi.json - type: Overlay url: overlays/sk-telecom-meta-overlay.yaml - type: LLMsTxt url: llms/sk-telecom-meta-llms.txt name: llms.txt published at https://meta-skopenapi.readme.io/llms.txt - type: ErrorCatalog url: https://meta-skopenapi.readme.io/reference/error-code-2 name: META Error Code reference - type: AgentSkill url: skills/sk-telecom-analyze-video-with-meta.md name: Analyze video and images with SK Telecom META - aid: sk-telecom:sk-telecom-ovs-api name: SK Telecom OVS API description: >- OVS is SK Telecom's road-event alerting service. Twelve documented operations covering customer company lookup, registration/lookup/deletion of target devices, broadcast of alert messages to devices when a road incident occurs, and per-company event statistics and raw event data retrieval. TERMINATED: SK open API announced end of service on 2026-04-06 with effect from 2026-04-07 13:00 KST — roughly one day of notice — deleting the plans of every consuming app. The OpenAPI was never marked deprecated and the documentation hub is still online; the definition is retained here as a record of a sunset contract. humanURL: https://openapi.sk.com/ baseURL: https://apis.openapi.sk.com/api/ovs tags: - Mobility - Safety - Messaging - Internet of Things properties: - type: Documentation url: https://openapi.sk.com/ - type: APIReference url: https://ovs-skopenapi.readme.io/ - type: OpenAPI url: openapi/sk-telecom-ovs-openapi.json - type: Overlay url: overlays/sk-telecom-ovs-overlay.yaml - type: LLMsTxt url: llms/sk-telecom-ovs-llms.txt name: llms.txt published at https://ovs-skopenapi.readme.io/llms.txt - type: Deprecation url: https://openapi.sk.com/support/notice/detailView?ntiSeq=357 name: OVS API 서비스 종료 안내 — end of service 2026-04-07 13:00 KST - aid: sk-telecom:sk-telecom-geovision-api name: SK Telecom Geovision Floating Population API description: >- 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 downloadable OpenAPI was published for this product at the time of review. humanURL: https://openapi.sk.com/products/detail?svcSeq=2 baseURL: https://apis.openapi.sk.com/tmap/puzzle tags: - Big Data - Location - Footfall - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=2 - aid: sk-telecom:sk-telecom-puzzle-subway-congestion-api name: SK Telecom Puzzle Subway Congestion API description: >- 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. humanURL: https://openapi.sk.com/products/detail?svcSeq=54 baseURL: https://apis.openapi.sk.com/puzzle/subway tags: - Big Data - Transit - Congestion properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=54 - type: RateLimits url: rate-limits/sk-telecom-rate-limits.yml name: Free-plan daily quotas — station list 100/day, real-time train congestion 1,000/day - aid: sk-telecom:sk-telecom-puzzle-travel-api name: SK Telecom Puzzle Domestic Travel API description: >- Domestic travel analytics — traveller volume by destination, in-region dwell time, and traveller characteristics (gender, age band, companion type). Documented on the SK open API portal; no downloadable OpenAPI was published for this product at the time of review. humanURL: https://openapi.sk.com/products/detail?svcSeq=57 baseURL: https://apis.openapi.sk.com/puzzle/travel tags: - Big Data - Travel - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=57 - type: RateLimits url: rate-limits/sk-telecom-rate-limits.yml name: Free-plan daily quotas — 100/day on destination list, traveller count and dwell time - aid: sk-telecom:sk-telecom-puzzle-restaurant-api name: SK Telecom Puzzle Restaurant API description: >- 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 this product at the time of review. humanURL: https://openapi.sk.com/products/detail?svcSeq=69 baseURL: https://apis.openapi.sk.com/puzzle/restaurant tags: - Big Data - Restaurants - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=69 - aid: sk-telecom:sk-telecom-puzzle-academy-api name: SK Telecom Puzzle Academy API description: >- 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 published for this product at the time of review. humanURL: https://openapi.sk.com/products/detail?svcSeq=70 baseURL: https://apis.openapi.sk.com/puzzle/academy tags: - Big Data - Education - Analytics properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=70 - aid: sk-telecom:sk-telecom-passkey-api name: Passkey by SK Telecom API description: >- 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 outside Korea that host answered HTTP 200 but served only a meta-refresh stub, so the guide content itself could not be retrieved and no OpenAPI was recoverable. humanURL: https://openapi.sk.com/products/detail?svcSeq=73 tags: - Identity - Authentication - Passkey - FIDO properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=73 - type: Documentation url: https://api.passkey-sktelecom.com/docs/api.html - aid: sk-telecom:sk-telecom-t-id-api name: SK Telecom T ID Login API description: >- 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 integrate T ID login through the T ID Developers channel portal. No .well-known/openid-configuration or .well-known/oauth-authorization-server document is served — those paths return the SPA shell. humanURL: https://developers.t-id.co.kr/ tags: - Identity - Authentication - Single Sign On properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=63 - type: Documentation url: https://developers.t-id.co.kr/ - aid: sk-telecom:sk-telecom-nugu-developers name: NUGU Developers description: >- 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 OpenAPI or machine-readable descriptor was retrievable anonymously. humanURL: https://developers.nugu.co.kr/ tags: - Artificial Intelligence - Voice - Assistant properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=62 - type: Documentation url: https://developers.nugu.co.kr/ - aid: sk-telecom:sk-telecom-qrng-api name: SK Telecom QRNG description: >- 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 than a documented REST API — no endpoints, base URL or OpenAPI were published at the time of review. humanURL: https://openapi.sk.com/products/detail?svcSeq=29 tags: - Security - Quantum - Random Number Generation properties: - type: Documentation url: https://openapi.sk.com/products/detail?svcSeq=29 common: - type: AgenticAccess url: agentic-access/sk-telecom-agentic-access.yml - type: DomainSecurity url: security/sk-telecom-domain-security.yml - type: Authentication url: authentication/sk-telecom-authentication.yml - type: Website url: https://www.sktelecom.com/ - type: DeveloperPortal url: https://openapi.sk.com/ name: SK open API — operated by SK Telecom Co., Ltd. - type: SignUp url: https://openapi.sk.com/user/signUp - type: SignIn url: https://openapi.sk.com/user/login - type: Support url: https://openapi.sk.com/support/qna/qnaListView - type: FAQ url: https://openapi.sk.com/faq - type: TermsOfService url: https://openapi.sk.com/stplat/usage/indexView - type: PrivacyPolicy url: https://privacy.sktelecom.com/view.do?ctg=policy&name=policy - type: Blog url: https://news.sktelecom.com/ - type: GitHubOrganization url: https://github.com/sktelecom - type: OpenSource url: https://sktelecom.github.io/en/ - type: LinkedIn url: https://www.linkedin.com/company/sk-telecom - type: Email url: mailto:skopenapi@sktelecom.com - type: PartnerProgram url: https://open2u.sktelecom.com/web/WWO01N051X01.do name: T Open API via SK Telecom Open2U partner programme - type: Enterprise url: https://www.sktenterprise.com/ - type: Standards url: https://github.com/camaraproject/Governance/blob/main/PARTICIPANTS.MD name: SK Telecom listed as a CAMARA Project participant - type: Standards url: https://www.gsma.com/solutions-and-impact/gsma-open-gateway/gsma_orgs/sk-telecom/ name: GSMA Open Gateway organisation page for SK Telecom (HTTP 403 to anonymous probe) - type: Aggregator url: https://www.bridgealliance.com/baex/ name: Bridge Alliance API Exchange — SK Telecom is an endorsing operator - type: Aggregator url: https://adunaglobal.com/resources/news-aduna-and-sk-telink-announce-collaboration-to-bring-korea-into-the-global-network-api-ecosystem/ name: Aduna / SK telink MoU, 8 September 2025 - type: Documentation url: https://openapi.sk.com/products/detail?linkMenuSeq=61 name: SK open API product catalog and documentation - type: ChangeLog url: https://openapi.sk.com/support/notice/listView name: SK open API 공지사항 — dated notice board where API changes are announced - type: ChangeLog url: changelog/sk-telecom-changelog.yml - type: Lifecycle url: lifecycle/sk-telecom-lifecycle.yml - type: Deprecation url: lifecycle/sk-telecom-lifecycle.yml name: >- Deprecations are announced on the portal notice board with no written policy and, on the 2026 evidence, roughly one day of notice; captured with the sunset events. - type: Conventions url: conventions/sk-telecom-conventions.yml - type: ErrorCatalog url: errors/sk-telecom-error-codes.yml name: SK open API gateway common error codes plus per-product error registries - type: ErrorCatalog url: errors/sk-telecom-problem-types.yml name: Error responses derived from the six OpenAPI documents - type: RateLimits url: rate-limits/sk-telecom-rate-limits.yml - type: Conformance url: conformance/sk-telecom-conformance.yml - type: DataModel url: data-model/sk-telecom-data-model.yml - type: Packages url: packages/sk-telecom-packages.yml name: No first-party SDK is published for any SK Telecom API (registries probed 2026-07-25) - type: Sandbox url: sandbox/sk-telecom-sandbox.yml name: Try-it consoles only — no sandbox environment and no test credentials - type: WellKnown url: well-known/sk-telecom-well-known.yml - type: MCPServer url: mcp/sk-telecom-mcp.yml name: >- 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 - type: ToolCrosswalk url: mcp/sk-telecom-tool-crosswalk.yml - type: LLMsTxt url: llms/sk-telecom-llms.txt - type: AgentSkill url: skills/_index.yml name: Four packaged Agent Skills grounded in verified operationIds maintainers: - FN: Kin Lane email: kin@apievangelist.com