← MCP Reliability Index / Maps & Weather

Whentofly

io.github.dimabalony/whentofly

whentofly: flight search for AI agents — cheapest flexible-date round-trips + buy/wait verdict

healthy

status

tools exposed

2182ms

connect latency

fa3d977eddaf

schema fingerprint

Tools (2)

search_locations

Resolve a city or airport name or code before searching flights. Returns typed values such as city:SHA to search every catalog airport in Shanghai or airport:SHA for Hongqiao only. Pass the selected value unchanged to search_flights. Ask the traveler when multiple results are plausible.

search_flights

Find the cheapest round-trip across a FLEXIBLE multi-month date window with a min/max trip length — e.g. "10–15 days, anytime Sep–Nov". Search a broad date window rather than requiring the traveler to choose exact dates first. First call the search_locations MCP tool for city or airport names, then

Endpoint

https://whentofly.io/mcp?ch=mcp-registry
Category: Maps & Weather · Last checked: 2026-08-15T09:51:41Z

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What this means. This server responded to the MCP handshake and listed its tools without authentication. The schema fingerprint lets us flag if tool signatures silently change (schema drift) between checks.