Opensky is answering right now. Last checked 4 min ago. It exposes 35 tools. Last commit 13 Sep 2026.
OpenSky MCP — OpenSky Network API (free, no auth for anonymous access)
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 Opensky 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 4 min ago.
claude mcp add opensky --transport http https://gateway.pipeworx.io/opensky/mcp
{
"mcpServers": {
"opensky": {
"url": "https://gateway.pipeworx.io/opensky/mcp"
}
}
}
[mcp_servers.opensky]
url = "https://gateway.pipeworx.io/opensky/mcp"
{
"mcpServers": {
"opensky": {
"url": "https://gateway.pipeworx.io/opensky/mcp"
}
}
}
{
"mcpServers": {
"opensky": {
"url": "https://gateway.pipeworx.io/opensky/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
get_aircraft
airspace_activity
bet_research
compare_entities
deep_research
discover_tools
entity_profile
get_flights
forget
generate_llms_txt
recall
remember
resolve_entity
get_states
subscribe
list_subscriptions
suggest_questions
unsubscribe
validate_claim
ai_visibility_check
search_within
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://gateway.pipeworx.io/opensky/mcp | streamable-http | answering | 120 ms | 4 min ago |
Flights MCP — wraps OpenSky Network API (free, no auth required)
Open Beauty Facts MCP — Open Beauty Facts API (free, no auth, keyless).
Flood MCP — wraps Open-Meteo Flood API (free, no auth)
Breweries MCP — Open Brewery DB API (free, no auth)
Climate MCP — wraps Open-Meteo Climate API (free, no auth)
OpenAQ MCP — wraps OpenAQ v2 API (free, no auth required)
OpenAlex MCP — wraps the OpenAlex API (scholarly works, free, no auth)
Marine MCP — wraps marine-api.open-meteo.com (free, no auth)
Answers built from our own checks of this server.