Should my agent depend on the MCP server com.southlondonscientific/hermes?

Verdict: allow — mid-slow-shared — safe to depend on As of 2026-08-15T11:28:18Z: a dated observation with receipts, not a warranty.

Hermes — Air Quality Intelligence

com.southlondonscientific/hermes

UK air quality MCP: live readings, historical trends, LAQM stats, WHO checks, knowledge base.

— the operator's own registry description reported

Publisher com.southlondonscientific · first seen 2026-08-12 · endpoint https://hermes.southlondonscientific.com/mcp

allow

verdict

mid-slow-shared

cluster

ok_tools

answers

tools served

Dependency rating derived

allow — mid-slow-shared — safe to depend on

Cluster mid-slow-shared · distinctiveness 0.612 (unusual). Every figure is a percentile or class within the 11,094-server census — see the whole spectrum.

Reach — can an agent get to it?

answersalive_tools

latency544 ms

vs populationslow

protocolcurrent

authopen

Use — can it use it?

tools15

vs populationmid

capabilities4

harnessB

Trust — can it rely on it?

identityshared

servers on its host1

servers on its domain2

verifiabilityunassessed

duplicate inventoryno

drift events0

answers trueno primary

🔏 Signed receipt rr_c14d5bdf5ea87026218af544 · 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

assess_location_aq chart_aq_trend compare_locations get_aqi_summary get_current_aq get_historical_aq kb_get_guidelines kb_get_health_effects kb_get_local_context kb_get_monitoring_explainer kb_get_practical_advice list_monitors regulatory_stats time_patterns trend_analysis

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 B — usable, with rough edges.

legibility check	tools passing	ok
name is clear & specific	15/15	✓
has a description	15/15	✓
description is substantive	15/15	✓
parameters are typed	15/15	✓
parameters are described	0/15	0/15

15 of 15 tools graded · 15 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

1.27.1

server version hermes

Capabilities: experimental prompts resources 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)

date	type	what changed
2026-08-12	outcome	first probe: ok_tools

raw probe records

probed (UTC)	outcome	http	ms	protocol
2026-08-14T19:58:30Z	ok_tools	200	544	2025-06-18
2026-08-12T05:33:45Z	ok_tools	200	578	2025-06-18

Watch or embed this verdict

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.southlondonscientific/hermes.svg)](https://robinsaige.com/s/com.southlondonscientific/hermes)

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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