API Endpoints

    For engineers and researchers who build AI systems

    Endpoint quick-reference for Korean, global, and Chinese model providers: base URLs, OpenAI compatibility, and documentation links.

    Quickstart

    Most providers below speak the OpenAI chat/completions format — switching providers is usually just a base URL and API key swap.

    # Any OpenAI-compatible provider: swap base_url and key
curl https://api.upstage.ai/v1/chat/completions \
  -H "Authorization: Bearer $UPSTAGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "solar-pro3",
    "messages": [{"role": "user", "content": "안녕하세요!"}]
  }'

    Korea

    Solar APIUpstage
    OpenAI-compatible
    Docs
    https://api.upstage.ai/v1

    Solar Pro models plus document parsing/OCR APIs. Point the OpenAI SDK at the base URL and it works.

    CLOVA StudioNAVER Cloud
    OpenAI-compatible
    Docs
    https://clovastudio.stream.ntruss.com/v1/openai

    HyperCLOVA X (HCX) models through NAVER Cloud. The /v1/openai path speaks the OpenAI chat/embeddings format with a CLOVA Studio API key.

    Global

    Claude APIAnthropicDocs
    https://api.anthropic.com/v1/messages

    Native Messages API with official SDKs. Claude 5 family: Opus 5, Sonnet 5, Fable 5, plus Haiku 4.5 for speed.

    OpenAI APIOpenAI
    OpenAI-compatible
    Docs
    https://api.openai.com/v1

    GPT model family, Codex, image and speech APIs. The chat/completions format everyone else emulates.

    Gemini APIGoogle
    OpenAI-compatible
    Docs
    https://generativelanguage.googleapis.com/v1beta

    Gemini models with a generous free tier via AI Studio. OpenAI-compatible layer at /v1beta/openai/.

    Mistral APIMistral AI
    OpenAI-compatible
    Docs
    https://api.mistral.ai/v1

    Mistral model family with a free experimentation tier (La Plateforme).

    Grok APIxAI
    OpenAI-compatible
    Docs
    https://api.x.ai/v1

    Grok models with live X data access, OpenAI- and Anthropic-compatible request formats.

    OpenRouterOpenRouter
    OpenAI-compatible
    Docs
    https://openrouter.ai/api/v1

    One key, 400+ models across every major lab — the fastest way to compare models without separate accounts.

    Groq APIGroq
    OpenAI-compatible
    Docs
    https://api.groq.com/openai/v1

    LPU-served open-weight models (Llama, Qwen, and others) at very high token speed, with a free tier for prototyping.

    Together AITogether AI
    OpenAI-compatible
    Docs
    https://api.together.xyz/v1

    Serverless inference and fine-tuning across 200+ open-weight models.

    China

    DeepSeek APIDeepSeek
    OpenAI-compatible
    Docs
    https://api.deepseek.com

    DeepSeek chat and reasoner models at aggressively low prices — the API that reset the industry's cost expectations.

    Model Studio (Qwen)Alibaba Cloud
    OpenAI-compatible
    Docs
    https://dashscope-intl.aliyuncs.com/compatible-mode/v1

    Qwen model family (text, vision, audio, image) via the international DashScope compatible-mode endpoint.

    Moonshot APIMoonshot AI
    OpenAI-compatible
    Docs
    https://api.moonshot.ai/v1

    Kimi models including the open-weight K series, on the international platform endpoint.

    Z.ai APIZ.ai (Zhipu)
    OpenAI-compatible
    Docs
    https://api.z.ai/api/paas/v4

    GLM model family on the international endpoint, including a low-cost coding plan popular with agent builders.