Uptime (30d)%100.0

Latency (p50)1301 msfaster than 20% of servers

Protocol eralegacy

Tools3

YardStock NZ Vehicle Listings

YardStock NZ Vehicle Listings is a remote MCP server published at stock.yardstock.nz. It has been probed 34 times since 9/4/2026. It answered in 34 of them (100.0%), a near-uninterrupted record. Median response time is 1,301 ms, a delay an agent will notice. It offers a narrow, focused set of 3 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.

Live used-car stock on named NZ dealer yards. Search make, model, price, city. Not Trade Me.

LegacyLegacy ⚠Version: 0.1.0First probe: 2026-09-04 15:47:51Last probe: 2026-09-07 05:25:31

Agent readability score

Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.

Agent readability score

Tool clarity and error handling need improvement for reliable agent use.based on measured tool list

Strengths

Clear search and fetch functions
Distinct tool purposes

Weaknesses

Ambiguous 'coverage' tool purpose
Missing error handling in descriptions
Parameter ambiguity without schema

coverage — Unclear purpose - ambiguous between service area and inclusion criteria
search_stock — No error handling for non-existent filters
get_listing — No parameter validation guidance

Verdict

Tools lack explicit error scenarios and parameter constraints. 'Coverage' tool's purpose remains ambiguous, risking incorrect agent usage.

9/7/2026, 1:29:54 AM

Event narrative

Raw observations

Run	Era	Modern	ms	Legacy	ms	Versions
2026-09-07 05:25:31	Legacy	401	1783	200	1782	2024-11-05
2026-09-07 02:57:58	Unknown	530	536	530	521	—
2026-09-07 00:27:42	Legacy	401	1270	200	1262	2024-11-05
2026-09-06 22:36:06	Legacy	401	1264	200	1268	2024-11-05
2026-09-06 20:44:13	Legacy	401	1356	200	1373	2024-11-05
2026-09-06 18:49:47	Unknown	530	519	530	512	—
2026-09-06 16:56:18	Legacy	401	1809	200	1817	2024-11-05
2026-09-06 15:42:25	Legacy	401	1338	200	1329	2024-11-05
2026-09-06 13:49:02	Legacy	401	1125	200	1125	2024-11-05
2026-09-06 11:55:12	Legacy	401	1148	200	1138	2024-11-05

Supported versions

2024-11-05

as declared by server/discover + initialize

Capabilities

tools

Schema score

100

3 tools

Schema compliance

tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.

100/100

Excellent3 tools

tools/list schema valid
inputSchema is valid JSON Schema
Smoke test not run this round
Cold-start: cold 490ms → warm 618ms (penalty 0ms)

Era history

Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.

Era distribution

Legacy94%Unknown6%

Legacy07.09 05:25

04.09 15:47Measurements: 3407.09 05:25

LegacyUnknown

Response time history

The two probe legs separately: modern server/discover and legacy initialize.

server/discoverinitialize

Event log

Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.

1 hour agoServer build: — → 0.1.0
1 hour agoSupported versions: — → 2024-11-05
1 hour agoEra changed: Unknown → Legacy
4 hours agoSupported versions: 2024-11-05 → —
4 hours agoEra changed: Legacy → Unknown
10 hours agoServer build: — → 0.1.0
10 hours agoSupported versions: — → 2024-11-05
10 hours agoEra changed: Unknown → Legacy
12 hours agoSupported versions: 2024-11-05 → —
12 hours agoEra changed: Legacy → Unknown

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Markdown

[![mcpmetrics](https://mcpmetrics.io/badge/nz.yardstock/nz-car-listings/era.svg)](https://mcpmetrics.io/servers/nz-yardstock-nz-car-listings)

HTML

<a href="https://mcpmetrics.io/servers/nz-yardstock-nz-car-listings"><img src="https://mcpmetrics.io/badge/nz.yardstock/nz-car-listings/era.svg" alt="mcpmetrics"></a>

Raw observations

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