Robin Saige we check the tools AI agents call

Gachi Data API — Japan Station & Accessibility Data

com.gachi-tokusuru/japan-data-api

Deep, obscure Japanese station, accessibility & hazard data for AI agents. English-first.

— the operator's own registry description reported

Publisher com.gachi-tokusuru · first seen 2026-08-12 · endpoint https://api.gachi-tokusuru.com/mcp

allow
verdict
mid-solo
cluster
ok_tools
answers
10
tools served

Dependency rating derived

allow — mid-solo — safe to depend on

Cluster mid-solo · distinctiveness 0.18 (typical). Every figure is a percentile or class within the 11,094-server censussee the whole spectrum.

Reach — can an agent get to it?
answersalive_tools
latency74 ms
vs populationtypical
protocolcurrent
authopen
Use — can it use it?
tools10
vs populationmid
capabilities1
harnessA
Trust — can it rely on it?
identitysolo
servers on its host1
verifiabilityunassessed
duplicate inventoryno
drift events0
answers trueno primary

🔏 Signed receipt rr_ad4505d2ceb28c5219952c61 · ed25519 · key rs-rcpt-2026-08 — this rating is tamper-evident; an agent gets the full signature from check_server and can verify it against the published key.

Tools last seen

get_active_alerts get_municipality_context get_public_toilet_by_city get_station_alerts get_station_context get_station_hazard get_toilet_by_station get_train_status ping station_search

Harness readiness observed

Can an agent's harness pick this tool and call it correctly? Graded on the three things an agent reads — name, description, typed parameters. Band A — an agent can pick and call these reliably.

legibility checktools passingok
name is clear & specific10/10
has a description10/10
description is substantive10/10
parameters are typed10/10
parameters are described10/10

10 of 10 tools graded · 10 with a captured input schema. RS-008, Tier-1 — no domain knowledge, applies to any tool. “Alive” is not the same as “usable”.

Truth checks observed

Not in the Tier-2 trade lane, or not yet checked. Tier-2 re-derives a server's answers against published primary sources — see truth checks.

Protocol conformance observed

2025-06-18
protocol version
session model
0.3.0
server version gachi-data-api

Capabilities: tools

Drift

No confirmed drift on record. Baseline set 2026-08-14; changes appear here after human review.

History observed

Every probe we made, oldest → newest (2 shown, 2026-08-12 → 2026-08-14). Green answered · amber answered-but-walled · red no useful answer. A gap in our cadence is a gap in coverage, not evidence about the server.

changelog (1 events)
datetypewhat changed
2026-08-12outcomefirst probe: ok_tools
raw probe records
probed (UTC) outcomehttpmsprotocol
2026-08-14T19:58:09Zok_tools200742025-06-18
2026-08-12T05:33:23Zok_tools200672025-06-18

Watch or embed this verdict

verdict badge

Operators: put the live verdict in your README — it updates with every census, links back here, and is a dated observation, never a warranty:

[![Robin Saige verdict](https://robinsaige.com/badge/com.gachi-tokusuru/japan-data-api.svg)](https://robinsaige.com/s/com.gachi-tokusuru/japan-data-api)

Depend on it? Subscribe to its change feed — outcome changes and confirmed drift, no account needed. Building on it? The full dossier as JSON — verdict, rating, truth checks, history — stable enough to gate CI on.

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