# Upstage

**Canonical:** https://apis.io/providers/upstage-ai/  
**Website:** https://upstage.ai  
**APIs profiled:** 12

Upstage is a Korean AI company offering the Solar LLM family and document AI (Document Parse, OCR, Information Extract, Classify) through Upstage Console at https://api.upstage.ai/v1. Its Solar Decide model (beta, built on Solar Mini 4) is exposed at POST /v1/systemone, a System One-style endpoint taking a state plus typed questions (choice, score, noul) and returning calibrated decisions; output tokens are not billed. API references are published as markdown under console.upstage.ai/api/ with an llms.txt index; the reference pages cite OpenAPI files (e.g. ./openapi/openapi-systemone.yaml) that are not publicly retrievable, so no provider-published OpenAPI was saved.

## Kin Score — 34.7 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-8.8 from 43.5).

| Facet | Score |
|---|---|
| Discoverability | 78.3 |
| Contract Quality | 27.7 |
| Contract Governance | 22.0 |
| Operational Transparency | 64.5 |
| Developer Ergonomics | 34.5 |
| Access Clarity | 10.5 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 19.1 (matched via fallback).

## Agent readiness — 24.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (12)

- **Upstage Chat Completions API** — POST /chat/completions for Solar models (OpenAI-compatible).
- **Upstage Responses API** — OpenAI-compatible Responses API with structured outputs, tool calling, reasoning and file_search.
- **Upstage Embeddings API** — Solar Embedding vectors for passages and queries.
- **Upstage Document Parse API** — Parse documents into structured HTML or Markdown, sync and async.
- **Upstage Document OCR API** — OCR for scanned documents and images.
- **Upstage Universal Information Extraction API** — Schema-driven structured extraction from documents, with async and schema generation.
- **Upstage Document Classification API** — Classify documents into user-defined classes.
- **Upstage Groundedness Check API** — Check LLM answers against source context.
- **Upstage Translation API** — Korean, English and Japanese translation models.
- **Upstage Vector Stores API** — Create, manage and search vector stores and file batches for file search.
- **Upstage Agents API** — Run Studio document agents: upload files and create/retrieve jobs.
- **Upstage System One API** — The System One API from Upstage — 1 operation(s) for system one.

## MCP servers (2)

- **MCP server manifest** — MCP server requiring an API key; 2 tools listed.
- **MCP server guide**

## Security (2)

- **Upstage Ai Authentication** — 1 scheme
- **Upstage Ai Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Artificial Intelligence, LLM, Document AI, OCR, Decision Support, Structured Outputs, Embeddings

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/upstage-ai/). Scores are computed from the provider's own public artifacts under a published rubric.