Should my agent depend on the MCP server org.polyform/polyform?

Verdict: allow — rich-solo — safe to depend on As of 2026-09-06T06:21:45Z: a dated observation with receipts, not a warranty.

Polyform

org.polyform/polyform

Pay-per-call data APIs for AI agents. USDC on Base via x402. 33 tools, no signup.

— the operator's own registry description reported

Publisher org.polyform · first seen 2026-08-27 · endpoint https://api.polyform.org/mcp

allow

verdict

rich-solo

cluster

ok_tools

answers

tools served

Dependency rating derived

allow
allow — alive & usable · retrieval-public ● · V3 has answer key ◐

allow — because answers ●, 67 tools legible (band A) ●, no confirmed drift in 2 probes ●; not yet checked: truth (3 attempts unverifiable, 0 disagreements)

Cluster rich-solo · distinctiveness 0.621 (unusual). Every figure is a percentile or class within the 15,472-server census — see the whole spectrum.

Does it answer? Q1 · observed

answersalive_tools

latency134 ms

vs populationtypical

protocolcurrent

authopen

Can it be used? Q4 · observed

tools67

vs populationhigh

capabilities3

harnessA

Did it hold when checked? Q3–Q4 · derived

identitysolo

servers on its host1

verifiabilityunassessed

duplicate inventoryno

drift events0

answers true0/0 agree

🔏 Signed receipt rr_9738a42b67a08b229d5492d0 · 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.

Q1Does it answer?alive & usable — 2 probes ●evidence ↓

Q2What is it?retrieval-public ● evidence ↓

Q3Can it be checked?V3 has answer key ◐evidence ↓

Q4Did it hold?harness A · truth not yet run · no drift ●evidence ↓

Q5What company does it keep?rich-solo · 1 on its host (context, not verdict) ◐evidence ↓

● observed · ◐ derived · ○ reported — the verdict synthesizes Q1–Q4; Q5 is context. Methodology →

History observed

Every probe we made, oldest → newest (2 shown, 2026-08-30 → 2026-09-06). 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 (2 events)

date	type	what changed
2026-09-06	inventory	tools 50 → 67
2026-08-30	outcome	first probe: ok_tools

What kind of tools these are derived

Verification only means something relative to a tool's NATURE — an email-sender has no "true answer", a generator has no answer key. Classification evidence: classified from tool names/descriptions/annotations WE OBSERVED. What checking applies to each kind (the full methodology →):

nature	tools	meaning	what checking applies
retrieval-public	54	serves public facts	truth-checkable against a public source — the V-ladder applies in full
computational	5	deterministic transforms	self-checkable by re-computation and known-answer tests
generative	3	creates content	no answer key exists; disclosure + stability checks, never truth verdicts
predictive	3	claims about the future	scoreable only in retrospect — the archive scores yesterday's predictions against today's outcome
orchestration	2	routes other tools	identity + fronted-service disclosure checks (gateway vs costume)

Tools last seen observed

ai_chat business_onboard_decision business_vet crypto_balance crypto_gas crypto_protocol crypto_token_report dns_lookup domain domain_brand_protection domain_dns_hygiene domain_due_diligence econ_compare_countries econ_country_snapshot econ_worldbank email_domain_check email_sender_trust fda_drug_label fda_recalls finance_company_360 finance_diligence_brief finance_health_scan finance_insider_activity finance_peer_compare geo_earthquakes geo_geocode geo_location_brief geo_reverse geo_severe_weather_scan health_clinical_trials health_drug_brief health_drug_safety_compare ip ip_intelligence legal_reg_watch legal_sanctions_screen logistics_route_brief realestate_property_report realestate_site_risk realestate_underwrite sec_company sec_company_snapshot sec_filings_search security_bulk_ip_screen security_domain_threat_report security_inbound_request_screen security_phishing_triage security_threat_lookup text_summarize threat_ip threat_scanners time_business_days trade_party_screen trade_shipment_clearance url_check url_safety vehicle_deal_check vehicle_fuel_economy vehicle_report vehicle_vin weather_alerts weather_current weather_forecast weather_hourly weather_metar weather_travel_risk wiki_summary

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	66/67	66/67
has a description	67/67	✓
description is substantive	67/67	✓
parameters are typed	67/67	✓
parameters are described	67/67	✓

67 of 67 tools graded · 67 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 yet confirmed — 3 attempt(s) currently unverifiable (rate limits, walls, or unmappable schemas — never counted against the server) · 0 disagreements.

claim class	key	verdict	primary source
OFAC SDN screening (vs the official list)	ISLAMIC REVOLUTIONARY GUARD CORPS	unverifiable	ofac-sdn
OFAC SDN screening (vs the official list)	MAERSK LINE	unverifiable	ofac-sdn
tariff-duty	unmapped	unverifiable	us-hts

Protocol conformance observed

2025-06-18

protocol version

—

session model

1.0.0

server version polyform

Capabilities: prompts resources tools

Drift observed

No confirmed drift on record. Baseline set 2026-09-06; changes appear here after human review.

raw probe records

probed (UTC)	outcome	http	ms	protocol
2026-09-06T06:18:05Z	ok_tools	200	134	2025-06-18
2026-08-30T06:17:45Z	ok_tools	200	188	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/org.polyform/polyform.svg)](https://robinsaige.com/s/org.polyform/polyform)

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.

← overview

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