# J-Quants

**Canonical:** https://apis.io/providers/j-quants/  
**Website:** https://jpx-jquants.com/  
**APIs profiled:** 10

J-Quants is a financial data API service operated by Japan Exchange Group (JPX) that makes it easy for retail investors to obtain cleansed financial data such as stock prices and financials in historical format. The service democratizes access to raw financial data for investment analysis.

## Kin Score — 29.1 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 29.1).

| Facet | Score |
|---|---|
| Discoverability | 72.2 |
| Contract Quality | 52.2 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| 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 |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (10)

- **J-Quants API** — The J-Quants API (V2) is a data distribution service operated by Japan Exchange Group (JPX) that makes it easy to obtain cleansed financial data such as Japanese stock prices an...
- **J-Quants Derivatives API** — The Derivatives API from J-Quants — 2 operation(s) for derivatives.
- **J-Quants Equities API** — The Equities API from J-Quants — 1 operation(s) for equities.
- **J-Quants Fins API** — The Fins API from J-Quants — 4 operation(s) for fins.
- **J-Quants Indices API** — The Indices API from J-Quants — 1 operation(s) for indices.
- **J-Quants Listed API** — The Listed API from J-Quants — 1 operation(s) for listed.
- **J-Quants Markets API** — The Markets API from J-Quants — 7 operation(s) for markets.
- **J-Quants Option API** — The Option API from J-Quants — 1 operation(s) for option.
- **J-Quants Prices API** — The Prices API from J-Quants — 2 operation(s) for prices.
- **J-Quants Token API** — The Token API from J-Quants — 2 operation(s) for token.

## Agentic access (1)

- **J Quants Agentic Access** — 21 operations · 2 acting

## Security (2)

- **J Quants Authentication** — apiKey · 2 schemes
- **J Quants Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **J Quants Plans Pricing**

## Tags

Financial Data, Investment, Japan, Stock Market

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