Library of Congress
Rank #11654pulsemcp/cyanheads-libofcongress
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 #11654 of 58,900 servers tracked on MCP Toplist, and its repository has 1 GitHub stars. Library of Congress is listed across 2 registries — Official MCP and PulseMCP, with 1 tracked version. It was first listed on May 24, 2026 and most recently updated on May 24, 2026.
Ranks ahead of 47,246 of 58,900 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": {
"cyanheads-libofcongress": {
"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": {
"cyanheads-libofcongress": {
"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.
Listed on 2 registries
cyanheads
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Available versions (1)
| Version | Published |
|---|---|
| 0.2.1 | May 24, 2026 |
Frequently asked questions
- What is Library of Congress?
- Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.
- Who maintains Library of Congress?
- Library of Congress is maintained by cyanheads, which publishes 81 MCP servers (547 total versions) tracked on MCP Toplist.
- Is Library of Congress an official MCP server?
- Yes — Library of Congress is listed on the Official MCP Registry, alongside PulseMCP.
- How many versions does Library of Congress have?
- MCP Toplist tracks 1 version of Library of Congress, most recently published on May 24, 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.