new bus API not working

Adam Zurek

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Sep 29, 2025, 9:08:06 AMSep 29

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I just got a new API today and when I test it at the link below. I get an error saying the API key is not authorized. note that when I tested it I had my correct API key in the URL

https://bustime.mta.info/api/siri/stop-monitoring.json?key={insert-api-code}&MonitoringRef={401912}&LineRef={M104}

this is the message I get.... {"Siri":{"ServiceDelivery":{"ResponseTimestamp":"2025-09-25T18:50:53.862-04:00","VehicleMonitoringDelivery":[{"ResponseTimestamp":"2025-09-25T18:50:53.862-04:00","ErrorCondition":{"OtherError":{"ErrorText":"API key is not authorized."},"Description":"API key is not authorized."}}]}}}

any suggestions?

cohenjm98

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Nov 26, 2025, 8:38:42 AM (8 days ago) Nov 26

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I have had the same problem. Has anyone received a reply and an explanation and/or fix?

Dillon Shen-Cruz

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Nov 26, 2025, 11:26:59 AM (8 days ago) Nov 26

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Hi all,

Thank you for reaching out about this! Our engineers are working to fix this on the backend; hopefully, you will be able to resume use of the Bus Time feeds soon. Feel free to follow-up if this issue persists after today.

Thanks,

Dillon

On Monday, September 29, 2025 at 9:08:06 AM UTC-4 adam....@gmail.com wrote:

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