# Woodstock

**Canonical:** https://apis.io/providers/woodstock/  
**Website:** https://woodstock.co/  
**APIs profiled:** 0

Woodstock (Woodstock K.K., Tokyo) is a Japanese investment platform offering zero-commission, 24-hour US stock trading in JPY with fractional shares down to 0.0001-share increments. A Financial Products Intermediary registered with the Kanto Financial Bureau (No. 965), with customer assets held by affiliated broker AlpacaJapan, Woodstock's programmatic surface is a hosted Model Context Protocol server that lets AI agents like Claude, ChatGPT, and Grok manage portfolios, research US stocks, and place real trades after OAuth plus passkey authorization. Backed by Kindred Ventures, Coinbase, and Sony.

## Kin Score — 27.4 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 27.4).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 40.5 |
| Commercial Clarity | 44.7 |
| Access Clarity | 44.7 |

Regulatory layer — **Securities & Market Data**: 41.7 (matched via tags).

## Agent readiness — 18.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | verified |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## MCP servers (1)

- **Woodstock MCP Server**

## Security (2)

- **Woodstock Authentication** — oauth2 · 1 scheme
- **Woodstock Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Investing, Stock Trading, Brokerage, Fintech, Japan, MCP, AI Agents

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