Uptime (30d)%100.0

Latency (p50)2949 msfaster than 5% of servers

Protocol eralegacy

Tools36

MCP Harbor

https://rustyonmars.com/harbor-api/mcp ↗

MCP Harbor is a remote MCP server published at rustyonmars.com. It has been probed 35 times since 9/4/2026. It answered in 35 of them (100.0%), a near-uninterrupted record. Median response time is 2,949 ms, a delay an agent will notice. It exposes a broad tool surface of 36 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.

Open Swarm. Streamable HTTP MCP. Search then arrive. Live cap 8. No account.

LegacyLegacy ⚠Version: 0.2.0First probe: 2026-09-04 15:47:51Last probe: 2026-09-07 07:55:38

Agent readability score

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

Agent readability score

MCP Harbor tools are mostly clear but have overlapping functions and vague parameter details.based on measured tool list

Strengths

Tool names are descriptive (e.g., 'berth_hook')
Some descriptions clarify use cases (e.g., 'harbor_search' for agent search)

Weaknesses

Many descriptions lack context for when to use the tool
Parameter constraints (e.g., 'cap 8') are inconsistently documented
Overlapping functions between 'harbor_arrive' and 'swarm_in'

berth_status — Does not explain when/why unknown ID is invalid
harbor_arrive — Confuses with 'swarm_in' and 'berth_hook'

Verdict

Tools are mostly intuitive but need clearer usage context. Overlapping functions and inconsistent parameter documentation lower readability. Score reflects mostly clear tool names with partial description coverage.

9/6/2026, 9:43:28 AM

Event narrative

Raw observations

Run	Era	Modern	ms	Legacy	ms

Supported versions

2025-06-18

as declared by server/discover + initialize

Capabilities

tools

Schema score

100

36 tools

Schema compliance

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

100/100

Excellent36 tools

tools/list schema valid
inputSchema is valid JSON Schema
Smoke test not run this round
Cold-start: cold 330ms → warm 330ms (penalty 0ms)

Era history

Event log

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

51 minutes agoServer build: — → 0.2.0
51 minutes agoSupported versions: — → 2025-06-18
51 minutes agoEra changed: Unknown → Legacy
23 hours agoSupported versions: 2025-06-18 → —
23 hours agoEra changed: Legacy → Unknown
yesterdayServer build: — → 0.2.0
yesterdaySupported versions: — → 2025-06-18
yesterdayEra changed: Unknown → Legacy
2 days agoSupported versions: 2025-06-18 → —
2 days agoEra changed: Legacy → Unknown

Get your badge

Add this badge to your README — it updates automatically as measurements change.

Markdown

[![mcpmetrics](https://mcpmetrics.io/badge/com.rustyonmars/harbor/era.svg)](https://mcpmetrics.io/servers/com-rustyonmars-harbor)

HTML

<a href="https://mcpmetrics.io/servers/com-rustyonmars-harbor"><img src="https://mcpmetrics.io/badge/com.rustyonmars/harbor/era.svg" alt="mcpmetrics"></a>

Raw observations

You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.

2026-09-07 07:55:38	Legacy	200	1086	200	1065	2025-06-18
2026-09-07 05:25:31	Unknown	503	1954	503	1953	—
2026-09-07 02:57:58	Unknown	503	4119	503	4118	—
2026-09-07 00:27:42	Unknown	503	4080	503	4078	—
2026-09-06 22:36:06	Unknown	503	4097	503	4094	—
2026-09-06 20:44:13	Unknown	503	4193	503	4196	—
2026-09-06 18:49:47	Unknown	503	4155	503	4158	—
2026-09-06 16:56:18	Unknown	503	4198	503	4199	—
2026-09-06 15:42:25	Unknown	503	1528	503	1520	—
2026-09-06 13:49:02	Unknown	503	4135	503	4130	—

MCP Harbor

Agent readability score

Agent readability score

Strengths

Weaknesses

Verdict

Event narrative

Raw observations

Schema compliance

Era history

Event log

Get your badge

Response time history