Should my agent depend on the MCP server market.nostos/nostos?

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

NOSTOS

market.nostos/nostos

Retro games and vintage apparel in Duluth, GA. Live catalog, prices, trade-in offers, policies.

— the operator's own registry description reported

Publisher market.nostos · first seen 2026-08-12 · endpoint https://mcp.nostos.market/mcp

allow

verdict

mid-slow-solo

cluster

ok_tools

answers

tools served

Dependency rating derived

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

Cluster mid-slow-solo · distinctiveness 0.409 (moderate). 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

latency11879 ms

vs populationslow

protocolcurrent

authopen

Use — can it use it?

tools14

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_052a917e5b13264b61ed6cc1 · 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

check_availability get_buying_policy get_condition_grading_rubric get_credit_policy get_item get_return_policy get_shipping_estimate get_store_info get_trade_in_offer_estimate list_departments list_platforms list_recent_drops lookup_market_price search_inventory

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 check	tools passing	ok
name is clear & specific	14/14	✓
has a description	14/14	✓
description is substantive	14/14	✓
parameters are typed	14/14	✓
parameters are described	14/14	✓

14 of 14 tools graded · 14 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

1.1.0

server version nostos-market

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)

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

raw probe records

probed (UTC)	outcome	http	ms	protocol
2026-08-14T20:00:31Z	ok_tools	200	11879	2025-06-18
2026-08-12T05:35:45Z	ok_tools	200	10834	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/market.nostos/nostos.svg)](https://robinsaige.com/s/market.nostos/nostos)

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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