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Point a tool at a public GTFS feed zip and get the same Canonical GTFS Validator verdict your agent gets: exact notice codes, file locations, and pass or fail evidence. A small feed finishes in seconds, and large multi-megabyte feeds can take up to 90 seconds to check or 115 seconds to compare.
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Guest access is available after setup. Full account linking verified by PowMCP: Claude only.
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For clients that require manual configuration, use this app-only endpoint, its JSON entry, or one terminal command.
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https://powmcp.com/gtfs-feed-check/mcp {
"mcpServers": {
"powmcp-gtfs-feed-check": {
"type": "http",
"url": "https://powmcp.com/gtfs-feed-check/mcp"
}
}
}Terminal agents add this app with one command:
claude mcp add --transport http powmcp-gtfs-feed-check https://powmcp.com/gtfs-feed-check/mcpcodex mcp add powmcp-gtfs-feed-check --url https://powmcp.com/gtfs-feed-check/mcpgemini mcp add --transport http powmcp-gtfs-feed-check https://powmcp.com/gtfs-feed-check/mcpManage, disable, or remove this connection in your agent's own MCP settings. PowMCP does not label an external connection as installed without confirmation from that client.
Proof
Check a GTFS transit feed against the spec, with exact notice-code evidence, before you republish
Validate one public GTFS Schedule feed against the GTFS specification and Best Practices with exact notice-code and file-location evidence, or compare two feeds before and after a schedule change, with a clear automated-versus-human-review boundary.
Request cost1 completed result
Guests get 50 lifetime app requests. Free accounts get 100 each calendar month.
gtfs_feed_check
Validates one directly hosted public GTFS Schedule feed against the GTFS specification and Best Practices using a pinned local Canonical GTFS Validator 8.0.1 engine run in a no-network sandbox. Returns the automated verdict: pass boolean, engine version and profile date, notice counts by severity (error/warning/info), every notice grouped most-severe-first with its notice code (foreign_key_violation, stop_too_far_from_shape, …), affected file and field, and example row/field locations, plus a structural inventory (present required and optional tables, agency/route/trip/stop/shape counts, feed_info presence, service-date span) and SHA-256 of the exact bytes. Use for one-feed readiness and diagnosis: 'is this transit feed valid', 'will it pass a consumer publish gate', 'what is wrong with it'. A pass means only that the bytes satisfied the automated profile; it never judges whether the timetable reflects real-world service, validates GTFS-Realtime, or guarantees any distributor will accept the feed, and human review of the underlying schedule is always required. Downloads and validates a live multi-megabyte feed and can take up to 90 seconds, always within the deadline the app promises.
gtfs_feed_compare
Runs the identical pinned Canonical GTFS Validator 8.0.1 validation over exactly two directly hosted public GTFS Schedule feeds for the same agency (baseline first, revised second) sequentially under one shared 115-second deadline, then reports which notice codes regressed or were resolved between them. Returns per-feed hashes, pass verdicts, severity counts and service-date spans, a regressions list (codes that appear or worsen in the revised feed), a resolved list (codes removed or reduced), and a ranking by pass state then fewer ERROR notices. Use for 'did my schedule change regress the feed', 'which build has fewer problems', and feed-over-feed questions. The ranking orders automated conformance only (it never means one feed reflects truer real-world service), and human review remains required for both feeds. Downloads and validates two live multi-megabyte feeds and can take up to 115 seconds; tell the user before the call.
Other apps for the jobs next to GTFS Feed Check.
Scope and boundaries for GTFS Feed Check.
Validate BART's directly hosted google_transit.zip with up to 400 notice groups, or compare baseline and revised ZIPs for the same agency before publishing a schedule rebuild.
Read pass, errorCount, and the most severe notice first: pass means the pinned Canonical GTFS Validator reported no ERROR notice, while warnings and information may remain. Fix errors at their file, field, and example row, then warnings, and rerun; a truncated notice list is incomplete and no result proves the timetable matches real service. In comparisons, a pass and error-count tie provides no evidenced winner.
This accepts public GTFS Schedule ZIP feeds, not portal pages or GTFS-Realtime. A pass covers the pinned automated specification and Best Practices profile only; it does not confirm that service runs as scheduled or guarantee acceptance by a particular distributor, and human schedule review remains necessary.