Library of Congress
Rank #8,008io.github.cyanheads/libofcongress-mcp-server
Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.
Library of Congress is a Model Context Protocol (MCP) server published by cyanheads. It ranks #8,008 of 77,308 servers tracked on MCP Toplist, and its repository has 2 GitHub stars. Library of Congress is listed across 2 registries — Official MCP and PulseMCP, with 2 tracked versions. It was first listed on May 24, 2026 and most recently updated on Jun 20, 2026.
Ranks ahead of 69,300 of 77,308 servers on MCP Toplist.
Use Library of Congress
Add Library of Congress to any MCP client (Claude, Cursor, VS Code, …) with one of the configs below.
{
"mcpServers": {
"libofcongress-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/libofcongress-mcp-server"
],
"env": {
"LOC_USER_AGENT": "<your LOC_USER_AGENT>",
"LOC_REQUEST_DELAY_MS": "<your LOC_REQUEST_DELAY_MS>",
"MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
}
}
}
}Replace each placeholder with your own value before saving.
{
"mcpServers": {
"libofcongress-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/libofcongress-mcp-server"
],
"env": {
"LOC_USER_AGENT": "<your LOC_USER_AGENT>",
"LOC_REQUEST_DELAY_MS": "<your LOC_REQUEST_DELAY_MS>",
"MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
"MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
"MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
"MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
"MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
}
}
}
}Replace each placeholder with your own value before saving.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/io.github.cyanheads%2Flibofcongress-mcp-server)<a href="https://mcptoplist.com/server/io.github.cyanheads%2Flibofcongress-mcp-server"><img src="https://mcptoplist.com/badge/io.github.cyanheads%2Flibofcongress-mcp-server.svg" alt="MCP Toplist: Top 25% of 77,308" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Listed on 1 registry (1 delisted)
cyanheads
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Available versions (2)
| Version | Published |
|---|---|
| 0.2.10 | Jun 20, 2026 |
| 0.2.1 | May 24, 2026 |
Frequently asked questions
- Who maintains Library of Congress?
- Library of Congress is maintained by cyanheads, which publishes 129 MCP servers (821 total versions) tracked on MCP Toplist.
- Is Library of Congress listed on the Official MCP Registry?
- Yes — Library of Congress is listed on the Official MCP Registry, alongside PulseMCP.
- How many versions does Library of Congress have?
- MCP Toplist tracks 2 versions of Library of Congress, most recently published on Jun 20, 2026.
- Where can I find the source code for Library of Congress?
- The source code for Library of Congress is hosted at github.com/cyanheads/libofcongress-mcp-server.