Sos Entities is answering right now. Last checked 16 min ago. 283 installs a week from npm. It exposes 47 tools. Last commit 29 Oct 2026.
sos-entities — state business-entity registries in one normalised shape (fleet #2867).
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 28 October 2026. No other catalogue keeps this.
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 16 min ago.
claude mcp add sos-entities --transport http https://gateway.pipeworx.io/sos-entities/mcp
https://gateway.pipeworx.io/sos-entities/mcp
[mcp_servers.sos-entities]
url = "https://gateway.pipeworx.io/sos-entities/mcp"
{
"mcpServers": {
"sos-entities": {
"url": "https://gateway.pipeworx.io/sos-entities/mcp"
}
}
}
{
"servers": {
"sos-entities": {
"type": "http",
"url": "https://gateway.pipeworx.io/sos-entities/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
sos_entity
sos_new_entities
sos_search
archive_compare
archive_evidence
company_facts
company_register_search
pipeworx_feedback
pipeworx_trending
recent_alerts
recent_changes
resolution_audit
resolution_diff
scan_competitor_ai_presence
scan_dependency
updown_divergence_rate
updown_venue_compare
bet_research
classify_row
compare_entities
deep_research
discover_tools
entity_profile
forget
generate_llms_txt
kalshi_weather_edge
prediction_calibration
recall
release_calendar_markets
remember
research_row
resolve_entity
subscribe
list_subscriptions
suggest_questions
unsubscribe
validate_claim
ai_visibility_check
search_within
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://gateway.pipeworx.io/sos-entities/mcp | streamable-http | answering | 1041 ms | 16 min ago |
Colorado Secretary of State business entity search with status and registered agent lookup.
Polish National registry of businesses and other legal entities
Verify a US company is registered and active from official state registry open data.
Company search and enrichment from official business registers in 200+ countries.
Access Nordic business registries (Norway, Denmark, Finland, Sweden). 23 tools.
Polish National government's registry of all businesses, foundations, and other legal entities.
INSEE MCP — France's SIRENE business registry (INSEE).
U.S. business-registry data and change events from official state sources, for agents.
Answers built from our own checks of this server.