MCP server health, State of MCP census
Whentofly
io.github.dimabalony/whentofly
whentofly: flight search for AI agents — cheapest flexible-date round-trips + buy/wait verdict
Checks
The exact rows akashi check io.github.dimabalony/whentofly prints, from the 2026-07-22 census.
| Check | Status | Detail |
|---|---|---|
| registry status | pass | active |
| server.json valid | pass | validates against its declared JSON Schema |
| repo reachable | pass | exists |
| repo freshness | pass | pushed 6d ago |
| remote reachable | pass | HTTP 200 via initialize |
| MCP conformance | pass | initialize handshake ok |
| tools/list | pass | 1 tool: search_flights |
| at least one live entrypoint | pass | 2 alive |
| license present | pass | MIT |
| spec 2026-07-28 | fail | at-risk: requires the removed Mcp-Session-Id session mechanism |
Spec 2026-07-28 readiness
Verdict: at-risk(requires the removed Mcp-Session-Id session mechanism). Measured against the 2026-07-28 release candidate (ruleset 2026-07-28-rc) with read-only, keyless calls; see the ecosystem readiness report for how this server compares.
| Accepts handshake-free calls | no |
| server/discover implemented | no |
| Session independence | session required |
| Routing headers enforced | ignored |
Advisory: no resultType on results; no cache metadata on list results; negotiates 2025-06-18.
Evidence
Packages
No packages declared.
Remote endpoints
- https://whentofly.io/mcp?ch=mcp-registry
streamable-http · reachable· HTTP 200· initialize_ok
1 tools: search_flights
server.json
validagainst its declared schema
One of 18032 servers in the 2026-07-22 State of MCP census: 14367 healthy (79.7%), 2850 degraded (15.8%), 724 dead (4.0%), 91 unknown (0.5%).
Verify it yourself
This page is a static read of one dated probe. Run the same check locally, any time, with no key:
$ akashi check io.github.dimabalony/whentoflyInstall Akashi - single Go binary, zero keys, MIT licensed.
Is this your server?
Claiming a server (an auto-refreshing badge and a verified publisher profile) is coming soon. Until then, embed the verified-on-date badge yourself with akashi check io.github.dimabalony/whentofly --badge.
Open data, CC BY 4.0. How this census works - denominator, tiers, and what each check does.