Cataas is answering right now. Last checked 13 min ago. It exposes 39 tools. Last commit 18 Sep 2026.
CATAAS MCP — Cat as a Service (free, no auth)
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 August 2026. No other catalogue keeps this.
Today is the operative word: we check Cataas every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.
claude mcp add cataas --transport http https://gateway.pipeworx.io/cataas/mcp
{
"mcpServers": {
"cataas": {
"url": "https://gateway.pipeworx.io/cataas/mcp"
}
}
}
[mcp_servers.cataas]
url = "https://gateway.pipeworx.io/cataas/mcp"
{
"mcpServers": {
"cataas": {
"url": "https://gateway.pipeworx.io/cataas/mcp"
}
}
}
{
"mcpServers": {
"cataas": {
"url": "https://gateway.pipeworx.io/cataas/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
resolution_audit
resolution_diff
scan_competitor_ai_presence
scan_dependency
bet_research
cat_by_tag
company_facts
compare_entities
deep_research
discover_tools
entity_profile
forget
generate_llms_txt
kalshi_weather_edge
random_cat
recall
release_calendar_markets
remember
resolve_entity
subscribe
list_subscriptions
suggest_questions
list_tags
unsubscribe
validate_claim
ai_visibility_check
search_within
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://gateway.pipeworx.io/cataas/mcp | streamable-http | answering | 104 ms | 13 min ago |
EPA ECHO MCP — wraps EPA ECHO Web Services (free, no auth)
HTTP Cat MCP — wraps http.cat (free, no auth)
Auth Token MCP Service
Cat Facts MCP — wraps Cat Facts API (free, no auth)
Advice MCP — wraps Advice Slip API (free, no auth)
MusicBrainz MCP — wraps MusicBrainz Web Service v2 (free, no auth)
Fruityvice MCP — wraps Fruityvice API (free, no auth)
arXiv MCP — preprint server search (free, no auth)
Answers built from our own checks of this server.