# HaneruTo

**Canonical:** https://apis.io/providers/hakuto-0209-com/  
**Website:** https://hakuto-0209.com/  
**APIs profiled:** 2

HaneruTo — trading as hakuto, brand B612 SHEEP — is a Japanese one-person, AI-assisted web and systems development studio founded in 2025 that also ships b612, a Japanese-market code-review agent for AI coding assistants: review checklists by target type, industry presets with mandatory Japanese legal checkpoints (景表法 / 特商法 / 薬機法 / インボイス / 電帳法 / 宅建業法 / 介護保険法), failure patterns and 31 deterministic detection rules — no LLM involved; the server has no input for customer source code. b612 is published two ways on mcp.hakuto-0209.com: a remote MCP server at /mcp (Streamable HTTP, protocol 2025-06-18, ten tools with real inputSchemas, anonymous tools/list, keyless principles/rules) and an A2A 0.3 agent whose EdDSA-signed card at /.well-known/agent-card.json declares six skills behind an x-b612-key licence header, with the signing key at /.well-known/jwks.json. No REST/OpenAPI surface, no SDK, no self-serve sign-up; agent access is a monthly flat-fee licence priced on contact.

## Kin Score — 30.0 / 100 (thin)

Scored 2026-10-09 under rubric 0.23.0. Trend: flat (+0.0 from 30.0).

| Facet | Score |
|---|---|
| Discoverability | 68.3 |
| Contract Quality | 0.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 26.2 |
| Access Clarity | 52.6 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 32.4 (matched via fallback).

## Agent readiness — 18.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | derived |
| 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 | conformant |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (2)

- **b612 MCP Server** — Remote Model Context Protocol server at https://mcp.hakuto-0209.com/mcp (Streamable HTTP, POST only — GET returns 406 — protocol version 2025-06-18, serverInfo b612 0.1.0, hoste...
- **b612 A2A Agent** — Agent2Agent (A2A) protocol surface: an agent card served from https://mcp.hakuto-0209.com/.well-known/agent-card.json (protocolVersion 0.3, JSONRPC transport, version 0.1.0, pro...

## MCP servers (1)

- **HaneruTo MCP Server** — HaneruTo operates ONE remote MCP server, b612, at https://mcp.hakuto-0209.com/mcp — the same host that serves its A2A agent card and JSON-RPC endpoint (Vercel origin b612-a2a.ve...

## Agentic access (1)

- **Hakuto 0209 Com Agentic Access** — 16 operations

## Security (2)

- **Hakuto 0209 Com Authentication** — apiKey · 1 scheme
- **Hakuto 0209 Com Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Hakuto 0209 Com Plans Pricing**

## Tags

Agents, MCP, A2A, Code Review, Static Analysis, Developer Tools, Compliance, Web Development, Japan, Agent-Native

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/hakuto-0209-com/). Scores are computed from the provider's own public artifacts under a published rubric.