MTA API Debug Dashboard

Quick Summary

Request Details

Note: API diagnostics shown are for the Harlem Line (GCT ↔ Tenmile River). Use the URL Builder to construct poll URLs for other lines.

API Response

SUCCESS API returned valid data

Feed Analysis

Route IDs Found

Route ID	Trip Count	Note
3	41
5	6
6	3
1	35
2	41
4	20

Sample Trips

Trip ID	Route	Stops	Has Origin	Has Dest
3049525	3	16 stops: 1, 4, 56, 105, 106...	Yes	No
3049527	3	16 stops: 1, 4, 56, 105, 106...	Yes	No
3049529	3	15 stops: 1, 4, 105, 106, 108...	Yes	No
3048895	3	15 stops: 124, 121, 120, 118, 116...	Yes	No
3048896	3	16 stops: 1, 4, 56, 105, 106...	Yes	No

Train Matching Results

Trains Found: 0 No Matches

Skip Reasons

Reason	Count
No trip update	0
No origin stop	37
No destination stop	109
Wrong direction	0
Past departure	0

Display Data (What App Shows)

Data Source: REALTIME - Using live MTA data

Train Count: 1

Departure	Arrival	Train #	Source
9:14 PM	11:37 PM	3049	Live

Troubleshooting Guide

If API Status is FAIL:

• Check if the MTA API is experiencing downtime
• Verify network connectivity from your server
• The app will automatically fall back to static schedules

If API succeeds but no trains found:

• Check "Trips with Our Stops" - if 0, the feed may not include your stations
• Look at "Skip Reasons" to understand why trains are being filtered out
• "no_destination_stop" = trains don't go all the way to destination
• "past_departure" = trains have already departed

If data source shows Static:

• Real-time data returned no matching trains
• This is normal late at night when few trains are running
• The app falls back to the embedded schedule (Harlem Line only)

Understanding Route IDs:

• Route ID "1" = Hudson Line
• Route ID "2" = Harlem Line
• Route ID "3" = New Haven Line

Raw Debug JSON

{
    "timestamp": "2026-04-11T20:12:58-04:00",
    "timezone": "America\/New_York",
    "direction": "north",
    "api_url": "https:\/\/api-endpoint.mta.info\/Dataservice\/mtagtfsfeeds\/mnr%2Fgtfs-mnr",
    "cache_key": "mta_gtfs_rt_feed",
    "cache_ttl_seconds": 30,
    "cache_status": "HIT",
    "cache_cleared": true,
    "api_fetch": {
        "success": true,
        "http_status": 200,
        "response_size": 97677,
        "response_preview": "0a090a01311882c7ebce0612fe050a04363330301ad7050a200a0733303439353235120830303a32353a30301a0832303236303431322a013312221206109cbdecce061a06109cbdecce06220131ea3e0912074f6e2d54696d65ea3e001228120610f4c1",
        "error": null,
        "response_time_ms": 86.31,
        "content_type": "application\/x-protobuf",
        "parse_success": true
    },
    "feed_analysis": {
        "feed_timestamp": "2026-04-11T20:12:50-04:00",
        "total_entities": 146,
        "trip_updates": 146,
        "vehicle_positions": 146,
        "alerts": 0,
        "route_ids_found": {
            "3": 41,
            "5": 6,
            "6": 3,
            "1": 35,
            "2": 41,
            "4": 20
        },
        "harlem_line_trips": 41,
        "trips_with_our_stops": 0,
        "sample_trip_ids": [
            {
                "trip_id": "3049525",
                "route_id": "3",
                "stop_count": 16,
                "stops": [
                    "1",
                    "4",
                    "56",
                    "105",
                    "106",
                    "108",
                    "110",
                    "111",
                    "112",
                    "114"
                ],
                "has_origin": true,
                "has_destination": false
            },
            {
                "trip_id": "3049527",
                "route_id": "3",
                "stop_count": 16,
                "stops": [
                    "1",
                    "4",
                    "56",
                    "105",
                    "106",
                    "108",
                    "110",
                    "111",
                    "112",
                    "114"
                ],
                "has_origin": true,
                "has_destination": false
            },
            {
                "trip_id": "3049529",
                "route_id": "3",
                "stop_count": 15,
                "stops": [
                    "1",
                    "4",
                    "105",
                    "106",
                    "108",
                    "110",
                    "111",
                    "112",
                    "114",
                    "115"
                ],
                "has_origin": true,
                "has_destination": false
            },
            {
                "trip_id": "3048895",
                "route_id": "3",
                "stop_count": 15,
                "stops": [
                    "124",
                    "121",
                    "120",
                    "118",
                    "116",
                    "115",
                    "114",
                    "112",
                    "111",
                    "110"
                ],
                "has_origin": true,
                "has_destination": false
            },
            {
                "trip_id": "3048896",
                "route_id": "3",
                "stop_count": 16,
                "stops": [
                    "1",
                    "4",
                    "56",
                    "105",
                    "106",
                    "108",
                    "110",
                    "111",
                    "112",
                    "114"
                ],
                "has_origin": true,
                "has_destination": false
            }
        ]
    },
    "trains_found": {
        "count": 0,
        "skipped": {
            "no_trip_update": 0,
            "no_origin_stop": 37,
            "no_destination_stop": 109,
            "wrong_direction": 0,
            "past_departure": 0
        },
        "trains": []
    },
    "display_data": {
        "train_count": 1,
        "data_source": "realtime",
        "trains": [
            {
                "departure": "9:14 PM",
                "arrival": "11:37 PM",
                "train_number": "3049",
                "is_realtime": true
            }
        ]
    }
}