io.github.localgov-jp/mcp-server

REMOTE · LOCALGOV.JP · 2 COMPONENTS · SCANNED AUG 3

Japan central + municipal subsidies (20,810 grants, 1,627 munis). 8 tools beyond Jグランツ MCP.

Available components

remote · localgov.jp 67 npm · @localgov-jp/mcp-server 60

+4 this week 67 67 Trust /100

Trust breakdown (6 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →

Endpoint Security63

The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
HTTPS not yet verified: we couldn't determine whether a plaintext access path exists. View diagnostics → Unverified
HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail

Transport & Reachability100

Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass

Schema Quality & AI Usability66

AI-judged instruction clarity (good).Pass
Context-footprint check failed: tool/resource definitions use about 1110 tokens (~138/item across 8 items; 8 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
Usage-examples check failed: none of the tools include examples. See how to fix → Fail

Stability & Change Management27

Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial

Tool Coverage100

100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
100% of tool parameters carry a description.Pass
Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass

Capabilities100

Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass

Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

remote · localgov.jp

Claude Codex opencode OpenClaw Hermes Other

# add to Claude Code

claude mcp add --transport http localgov-jp-mcp-server https://localgov.jp/mcp

# ~/.codex/config.toml

[mcp_servers.localgov-jp-mcp-server]
url = "https://localgov.jp/mcp"

// opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "localgov-jp-mcp-server": {
      "type": "remote",
      "url": "https://localgov.jp/mcp",
      "enabled": true
    }
  }
}

# add to OpenClaw

openclaw mcp add localgov-jp-mcp-server --url https://localgov.jp/mcp --transport streamable-http

# ~/.hermes/config.yaml

mcp_servers:
  localgov-jp-mcp-server:
    url: "https://localgov.jp/mcp"

// mcp.json

{
  "mcpServers": {
    "localgov-jp-mcp-server": {
      "type": "http",
      "url": "https://localgov.jp/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

2 Aug 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
31 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
30 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
28 Jul 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
27 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
26 Jul 26 62

First indexed and scored.

Show 5 earlier entries Hide earlier entries

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 3 Aug 2026 · Probed https://localgov.jp/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject	Issuer	Valid from	Valid until	Key	Signature	Serial
CN=localgov.jp	CN=WE1,O=Google Trust Services,C=US	2 Jul 2026	1 Oct 2026	ECDSA 256	ECDSA-SHA256	bb890359c1b814c51311d08b43e04678
SANs: localgov.jp, api.localgov.jp, *.api.localgov.jp
CN=WE1,O=Google Trust Services,C=US (CA)	CN=GTS Root R4,O=Google Trust Services LLC,C=US	13 Dec 2023	20 Feb 2029	ECDSA 256	ECDSA-SHA384	7ff31977972c224a76155d13b6d685e3
CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA)	CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE	15 Nov 2023	28 Jan 2028	ECDSA 384	SHA256-RSA	7fe530bf331343bedd821610493d8a1b

DNSSEC insecure

Validation of localgov.jp. — Not signed

Zone	DS	Keys	Algorithms	Outcome
.	trust_anchor	20326, 38696	8, 8	Verified
jp.	present	33631	8	Verified
localgov.jp.	absent			Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation

Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result	No authorisation required
HTTP status	200

Transports 2 probes

Transport	URL	Outcome	Status	Location
streamable-http	https://localgov.jp/mcp	Verified	200
http (plaintext)	http://localgov.jp/mcp	Inconclusive	406

MCP tools — 8 exposed · ~996 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.

Tool Tokens

compare_municipal_subsidies ~109

Compare same-category subsidies across nearby municipalities (same prefecture by default). Useful for relocation / siting decisions. Free.

Input Output Examples

Name	Type	Req	Description
anchor_municipality_code	string	yes	JIS code of the anchor municipality to compare around
category	string	—	Category to compare; if omitted, the most-frequent category at the anchor is auto-picked
max_municipalities	integer	—	Max number of municipalities in the comparison (2-20, default 10)

Name	Type	Req	Description
anchor_municipality_code	string	yes	—
category	string	yes	—
municipalities_compared	integer	yes	—
per_municipality	array	yes	—
prefecture	string	yes	—

No examples provided.

find_practitioner ~126

Recommend 3 Japanese licensed practitioner types (行政書士 / 税理士 / 中小企業診断士 / 社労士) for the grant's category. Returns role explanations and official-association registry links. **Informational only** — LocalGov.jp does NOT broker, refer, or accept commission for these recommendations.

Input Output Examples

Name	Type	Req	Description
grant_id	string	yes	Subsidy id (the recommendation is shaped by the grant's category and amount tier)
industry_hint	string	—	Free-text industry context, e.g. "飲食業", "製造業"

Name	Type	Req	Description
grant_id	string	yes	—
legal_disclaimer	string	yes	—
notice	string	yes	—
practitioners	array	yes	—

No examples provided.

find_supplementary_grants ~123

Given a central J-Grants subsidy id, search for municipal grants that supplement it (e.g. national "事業再構築" + city-level "事業再構築追加上乗せ"). Heuristic title-token match. Free.

Input Output Examples

Name	Type	Req	Description
central_grant_id	string	yes	Central J-Grants id, e.g. "jg_a0W..."
limit	integer	—	Max records (1-50, default 30)
prefecture	string	—	Restrict supplementaries to municipalities of a single prefecture

Name	Type	Req	Description
base_token	string	yes	Heuristic base token used for matching
central	object	yes	Echo of the seed central grant
supplementary	array	yes	—
supplementary_count	integer	yes	—

No examples provided.

get_municipality_grants ~102

List all subsidies for a single municipality by JIS X 0402 6-digit code. **Differentiator**: J-Grants public API has zero municipal-level entries; LocalGov.jp covers 1,627 municipalities (target 1,718). Free.

Input Output Examples

Name	Type	Req	Description
limit	integer	—	Max records (1-200, default 50)
municipality_code	string	yes	JIS X 0402 6-digit municipality code

Name	Type	Req	Description
items	array	yes	—
municipality_code	string	yes	Echo of the requested code
total	integer	yes	Total grants for the municipality

No examples provided.

get_subsidy_detail ~98

Fetch the full record for a single subsidy by id. Returns `_source` (LocalGov.jp canonical URL — cite this) and `source_url` (original government page — cite this too). Free.

Input Output Examples

Name	Type	Req	Description
id	string	yes	Subsidy id, e.g. "jg_a0W2x000003QX8oEAG" (J-Grants central) or "131105_<slug>" (municipal)

Name	Type	Req	Description
_attribution	string	yes	Attribution string for CC BY 4.0
_license	string	yes	License hint
_source	string	yes	Canonical LocalGov.jp URL — cite this as "via LocalGov.jp"
amount_max_jpy	number\|null	yes	Maximum subsidy amount in JPY
category	string\|null	yes	Category label
deadline	string\|null	yes	Application deadline (ISO date)
eligibility	array	yes	Eligibility criteria, free-form
id	string	yes	Stable grant id
issuer	string	yes	Issuing authority (ministry, prefecture, or municipality)
municipality_code	string\|null	yes	JIS X 0402 6-digit code, null for central government grants
prefecture	string\|null	yes	Prefecture name in kanji
source_url	string\|null	yes	Original government page (cite this in addition to _source)
source_url_shared	boolean	yes	True when source_url is a category/index page shared by other grants. When true, cite as "LocalGov.jp listing" or pair with the LocalGov.jp _source for per-grant precision.
source_url_sibling_count	integer	yes	Number of other grants pointing at the same source_url (0 means dedicated per-grant page).
summary	string	yes	Short Japanese summary
title	string	yes	Official subsidy/grant title (Japanese)

No examples provided.

search_subsidies ~269

Search Japanese central + municipal subsidies. Combine keyword (Japanese), prefecture, municipality_code, category, or minimum amount. Returns up to `limit` records. Free.

Input Output Examples

Name	Type	Req	Description
category	string	—	Category label (e.g. "子育て", "住宅", "事業者支援") — usually omit and rely on keyword
keyword	string	—	Free-text Japanese keyword (FTS), e.g. "IT導入", "創業", "省エネ"
limit	integer	—	Max records to return (1-100, default 20)
min_amount_jpy	integer	—	Minimum subsidy amount in JPY; only records with amount_max_jpy >= this
municipality_code	string	—	JIS X 0402 6-digit municipality code (e.g. 131105 = 杉並区)
offset	integer	—	Pagination offset (default 0)
open_only	boolean	—	When true, exclude records whose deadline has passed (default: false = include all)
prefecture	string	—	Prefecture name in kanji, e.g. "東京都", "北海道"
sort	string	—	Sort order; default "relevance" when keyword set, otherwise "newest"

Name	Type	Req	Description
items	array	yes	Records on this page
total	integer	yes	Total matching records (independent of limit/offset)

No examples provided.

subscribe_changes ~129

Create a webhook subscription that pushes grant-change events matching a filter. Cost: $0.20 USDC via x402 (paid by the agent runtime). On 402 response, agent must satisfy payment and retry.

Input Output Examples

Name	Type	Req	Description
callback_url	string	yes	HTTPS URL that will receive POSTed event payloads
filter	object	yes	At least one filter dimension required
hmac_secret	string	yes	Shared secret used to HMAC-SHA256 sign delivery payloads (16-256 chars)
ttl_days	integer	—	Subscription lifetime in days (1-90, default 30)

Name	Type	Req	Description
callback_url	string	—	—
details	—	—	—
expires_at	string	—	—
payment_required	boolean	—	—
subscription_id	string	—	—

No examples provided.

verify_receipt ~40

Return LocalGov.jp's Ed25519 public key (for offline citation-receipt verification). Callers verify receipt signatures using WebCrypto with this key.

Input Output Examples

Input schema present but exposes no named parameters.

Name	Type	Req	Description
alg	string	yes	Signature algorithm (Ed25519)
issuer	string	yes	Trust anchor name
pubkey	string	yes	Base64-encoded 32-byte Ed25519 public key

No examples provided.

On this page

Handy links

Scoring key

80+ high trust
60–79 medium
below 60 low

How we score

Score history · last 30 days

26 Jul 3 Aug

Day	Score
26 Jul	62
27 Jul	63
28 Jul	64
29 Jul	64
30 Jul	65
31 Jul	66
1 Aug	66
2 Aug	67
3 Aug	67