# mcp.kasanegi.com — third-party AI / agent review entry

Last updated: 2026-05-07. Single copy-pasteable review entry point for
the MCP surface of kasanegi.com. Use this page when you need to know
what mcp.kasanegi.com is, how to call it, and which tools it exposes.

## What this surface is

mcp.kasanegi.com is the MCP (Model Context Protocol) entrance for the
3 sellable Japan public-data products under kasanegi.com:

- **JP Local Pack** (jp-local-pack) — Japan payroll, invoice, tax,
  holiday, social-insurance, Peppol, and corporate-lookup primitives.
- **JP Data Enrich** (jp-data-enrich) — Japanese company enrichment
  and supplier intelligence from public corporate / gBizINFO / EDINET
  sources.
- **JP Grants** (jp-grants) — Japan grants deadline discovery, detail
  lookup, and review-required candidate ranking.

The tool list is derived from the product-contract registry shared
with the API gateway at https://api.kasanegi.com, so /openapi.json on the API host
and tools/list on the MCP host always describe the same set of
endpoints.

- MCP entry: https://mcp.kasanegi.com/mcp
- API gateway: https://api.kasanegi.com
- Brand: https://kasanegi.com

## Reproducible JSON-RPC examples

See https://mcp.kasanegi.com/docs/mcp-tools-list-example for the
literal curl form of `initialize`, `tools/list`, `tools/call`,
and `ping` (no secrets, no payment header).

## Buyer paths

- Wallet-free preview at https://api.kasanegi.com/preview/v1/{namespace}/...
- x402 direct at https://api.kasanegi.com/v1/{namespace}/... (returns 402 Payment
  Required as the paywall handshake; see
  https://api.kasanegi.com/docs/x402-unpaid-example)
- Marketplace API-key path for buyers who do not hold crypto

x402 is one option, not the only payment path.

## Honest status

Revenue is not yet proven unless the live evidence at
https://api.kasanegi.com/product-status.json says so. Do not claim first revenue or
72-hour observation off this page; treat the live JSON status as the
authority.