Comparison

Kagi Search vs io.github.cyanheads/libofcongress-mcp-server

Kagi Search is an MCP server published by kagisearch. Marketplaces we read that list it: 1 (Docker MCP Catalog). io.github.cyanheads/libofcongress-mcp-server is an MCP server published by cyanheads. Marketplaces we read that list it: 2 (Official MCP Registry, npm registry (MCP servers)). As of our marketplace pass on 2026-10-25. 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	Kagi Search	io.github.cyanheads/libofcongress-mcp-server
Docker MCP Catalog	Listed Version: sha256:c26439346cd6 Forks (GitHub): 49 Pulls (Docker Hub): 20 145 Stars (Docker Hub): 1 Stars (GitHub): 547 Not marked · First seen 2026-10-11	Not listed
Official MCP Registry	Not listed	Listed Version: 0.5.1 Downloads/month (npm): 846 Downloads/week (npm): 225 Forks (GitHub): 1 Stars (GitHub): 5 Not marked · First seen 2026-10-11
npm registry (MCP servers)	Not listed	Listed Version: 0.5.1 Downloads/month (npm): 846 Downloads/week (npm): 225 Forks (GitHub): 1 Stars (GitHub): 5 Not marked · First seen 2026-10-12

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

Kagi Search vs io.github.cyanheads/libofcongress-mcp-server
Fact	Kagi Search	io.github.cyanheads/libofcongress-mcp-server
Marketplaces that list it (differs)	1 (worse)	2 (better)
Stars (GitHub) (differs)	547 (better)	5 (worse)
Pulls (Docker Hub) (differs)	20 145	No figure on Docker Hub
Forks (GitHub) (differs)	49 (better)	1 (worse)
Last release (differs)	Not published	2026-10-16
Where it runs (differs)	On your machine (mcp/kagisearch)	Remote server or your machine
Transport (differs)	stdio	Streamable HTTP
Tools it declares (differs)	2	Not published
Environment variables it asks for (differs)	2, secrets among them: 1	9, secrets among them: 0
Licence (differs)	MIT	Apache-2.0
Repository (differs)	github.com/kagisearch/kagimcp	github.com/cyanheads/libofcongress-mcp-server
Changes in the last 7 days	0	0
First seen	2026-10-11	2026-10-11
Endpoint at the last check (differs)	no remote endpoint we check	Responded 16 h ago

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

Kagi Search

In its own words, on Docker MCP Catalog:

The Official Model Context Protocol (MCP) server for Kagi Search & other tools.

io.github.cyanheads/libofcongress-mcp-server

In its own words, on Official MCP Registry:

Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.

How to run each

Kagi Search As a local MCP server: Docker image

Claude Code

claude mcp add --env "KAGI_API_KEY=<YOUR_KAGI_API_KEY>" --transport stdio kagisearch -- docker run -i --rm -e KAGI_API_KEY mcp/kagisearch

Requires: KAGI_API_KEY (secret)

io.github.cyanheads/libofcongress-mcp-server As a remote MCP server

Claude Code

claude mcp add --transport http libofcongress-mcp-server https://libofcongress.caseyjhand.com/mcp

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

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

Tools each declares

Only Kagi Search has

kagi_search_fetch
kagi_summarizer

Only io.github.cyanheads/libofcongress-mcp-server has

libofcongress_browse_collections
libofcongress_get_item
libofcongress_get_newspaper_page
libofcongress_search_items
libofcongress_search_newspapers
libofcongress_search_subjects

Both have

None

Tool names as the marketplaces declare them and as Ext Ops observed them on the endpoints (io.github.cyanheads/libofcongress-mcp-server as of 2026-10-18). More tools is not better in itself: compare what each needs for the job.

Settings each asks for

Only Kagi Search asks for

KAGI_API_KEY (secret)
KAGI_SUMMARIZER_ENGINE

Only io.github.cyanheads/libofcongress-mcp-server asks for

LOC_REQUEST_DELAY_MS
LOC_USER_AGENT
MCP_AUTH_MODE
MCP_HTTP_ENDPOINT_PATH
MCP_HTTP_HOST
MCP_HTTP_PORT
MCP_LOG_LEVEL
MCP_SESSION_MODE
MCP_TRANSPORT_TYPE

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

What it can do: Kagi Search · What it can do: io.github.cyanheads/libofcongress-mcp-server · Compare two other plugins

Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the public npm registry (registry.npmjs.org). Figures come from our own regular passes over the marketplaces, last read on 2026-10-25. We publish no contact details for plugin publishers.