Library Of Congress is listed as active in the registry but did not answer our last check. It exposes 31 tools. Last commit 19 Sep 2026.
Library of Congress (loc.gov) MCP — the world's largest library.
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 August 2026. No other catalogue keeps this.
Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.
claude mcp add library-of-congress --transport http https://gateway.pipeworx.io/library-of-congress/mcp
https://gateway.pipeworx.io/library-of-congress/mcp
[mcp_servers.library-of-congress]
url = "https://gateway.pipeworx.io/library-of-congress/mcp"
{
"mcpServers": {
"library-of-congress": {
"url": "https://gateway.pipeworx.io/library-of-congress/mcp"
}
}
}
{
"servers": {
"library-of-congress": {
"type": "http",
"url": "https://gateway.pipeworx.io/library-of-congress/mcp"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
polymarket_arbitrage
polymarket_edge_tracker
polymarket_edges
polymarket_fill_risk
polymarket_kalshi_spread
ask_pipeworx
ask_pipeworx_beta
ask_pipeworx_grounded
pipeworx_feedback
pipeworx_trending
recent_alerts
recent_changes
scan_competitor_ai_presence
scan_dependency
bet_research
compare_entities
deep_research
discover_tools
entity_profile
forget
generate_llms_txt
recall
remember
resolve_entity
subscribe
list_subscriptions
suggest_questions
unsubscribe
validate_claim
ai_visibility_check
search_within
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://gateway.pipeworx.io/library-of-congress/mcp | streamable-http | answering | 75 ms | 4 min ago |
Congress MCP — US Congress bill/law/member data via the official congress.gov API (Library of…
Search the Library of Congress collections. No key required.
Neo4j MCP Canary — The canary goes first so the rest of us know what's coming
Search the Internet Archive, the Library of Congress and data.bnf.fr at once, in one answer.
Search the Library of Congress catalogue, collections and digitised items - keyless.
Chronicling America: search historical US newspaper pages and titles at the Library of Congress.
Launches MCP — wraps Launch Library 2 API (ll.thespacedevs.com)
Search inside scanned US newspapers and browse the Library of Congress catalogue. No API key.
Answers built from our own checks of this server.