Comparison

io.github.OnChainAIIntel/pqs-mcp-server vs Iris

io.github.OnChainAIIntel/pqs-mcp-server is an MCP server published by OnChainAIIntel. Marketplaces we read that list it: 1 (Official MCP Registry). Iris is an MCP server published by iris-eval. Marketplaces we read that list it: 2 (Official MCP Registry, Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-18. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.

Where each is published

Where each is published
Marketplace	io.github.OnChainAIIntel/pqs-mcp-server	Iris
Official MCP Registry	Listed Version: 1.4.0 Downloads/month (npm): 254 Downloads/week (npm): 54 Forks (GitHub): 0 Stars (GitHub): 2 Not marked · First seen 2026-10-11	Listed Version: 0.20.0 Downloads/month (npm): 2 844 Downloads/week (npm): 185 Forks (GitHub): 4 Stars (GitHub): 9 Not marked · First seen 2026-10-11
Claude Code: claude-plugins-community	Not listed	Listed Version: 0.4.4 Forks (GitHub): 4 Stars (GitHub): 9 Not marked · First seen 2026-10-11

Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.

The facts side by side

io.github.OnChainAIIntel/pqs-mcp-server vs Iris
Fact	io.github.OnChainAIIntel/pqs-mcp-server	Iris
Marketplaces that list it (differs)	1 (worse)	2 (better)
Stars (GitHub) (differs)	2 (worse)	9 (better)
Forks (GitHub) (differs)	0 (worse)	4 (better)
Last release	Not published	Not published
Where it runs (differs)	Remote server (promptqualityscore.com/api/mcp)	On your machine (@iris-eval/mcp-server)
Transport (differs)	Streamable HTTP	stdio
Tools it declares	Not published	Not published
Environment variables it asks for (differs)	1, secrets among them: 1	31, secrets among them: 4
Parts of the bundle (differs)	Not a bundle	2
Licence (differs)	Not stated	MIT
Repository (differs)	github.com/onchainaiintel/pqs-mcp-server	github.com/iris-eval/mcp-server
Changes in the last 7 days	0	0
First seen	2026-10-11	2026-10-11
Endpoint at the last check (differs)	Responded 4 days ago	no remote endpoint we check

Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.

What each says it does

io.github.OnChainAIIntel/pqs-mcp-server

In its own words, on Official MCP Registry:

PQS scores any prompt before the model runs. 8 dimensions. 5 frameworks. Pre-flight, not post-hoc.

Iris

In its own words, on Official MCP Registry:

Stop shipping agents on vibes. Score every agent output for quality, safety, and cost.

How to run each

io.github.OnChainAIIntel/pqs-mcp-server As a remote MCP server

Claude Code

claude mcp add --transport http pqs-mcp-server https://promptqualityscore.com/api/mcp

Requires: PQS_API_KEY (secret)

Iris As a local MCP server: npm package

Claude Code

claude mcp add --env "IRIS_ANTHROPIC_API_KEY=<YOUR_IRIS_ANTHROPIC_API_KEY>" --env "IRIS_API_KEY=<YOUR_IRIS_API_KEY>" --env "IRIS_OPENAI_API_KEY=<YOUR_IRIS_OPENAI_API_KEY>" --env "IRIS_WEBHOOK_SECRET=<YOUR_IRIS_WEBHOOK_SECRET>" --transport stdio iris -- npx -y @iris-eval/mcp-server

Requires: IRIS_ANTHROPIC_API_KEY (secret), IRIS_API_KEY (secret), IRIS_OPENAI_API_KEY (secret), IRIS_WEBHOOK_SECRET (secret)

Commands built only from what the marketplaces declare; the full set for every client is on each card.

Only io.github.OnChainAIIntel/pqs-mcp-server has a remote endpoint we check. How we check endpoints

Tools each declares

Neither one's marketplaces publish a list of tools, so there is nothing to compare.

Settings each asks for

Only io.github.OnChainAIIntel/pqs-mcp-server asks for

PQS_API_KEY (secret)

Only Iris asks for

IRIS_ALLOWED_ORIGINS
IRIS_ALLOW_UNAUTHENTICATED
IRIS_ANTHROPIC_API_KEY (secret)
IRIS_API_KEY (secret)
IRIS_API_KEY_FILE
IRIS_CITATION_ALLOW_FETCH
IRIS_CITATION_DOMAINS
IRIS_DASHBOARD
IRIS_DASHBOARD_HOST
IRIS_DASHBOARD_PORT
IRIS_DB_PATH
IRIS_HOME

Show the remaining 19

IRIS_HOST
IRIS_LLM_JUDGE_MAX_COST_USD_PER_EVAL
IRIS_LOG_LEVEL
IRIS_OPENAI_API_KEY (secret)
IRIS_OTEL_ENDPOINT
IRIS_OTEL_HEADERS
IRIS_OTEL_SERVICE_NAME
IRIS_OTEL_TIMEOUT_MS
IRIS_PORT
IRIS_RELEVANCE_JUDGE_DAILY_BUDGET_USD
IRIS_RELEVANCE_JUDGE_MAX_CALLS_PER_REQUEST
IRIS_RELEVANCE_JUDGE_MODEL
IRIS_RELEVANCE_JUDGE_REDACT
IRIS_SEARCH_BUDGET_MS
IRIS_SEARCH_INDEX
IRIS_SQLITE_DRIVER
IRIS_TRANSPORT
IRIS_WEBHOOK_SECRET (secret)
IRIS_WEBHOOK_URL

Settings as each marketplace publishes them. Asking for fewer is not better in itself.

What it can do: io.github.OnChainAIIntel/pqs-mcp-server · What it can do: Iris · Compare two other plugins

Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on 2026-10-18. We publish no contact details for plugin publishers.