MTA Developer API Key

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Jan 8, 2026, 2:59:20 PM (yesterday) Jan 8

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Hi MTA BusTime team,

I registered for a BusTime API key today and received confirmation, but when I try to use it I get the error "API key is not authorized."

API Key: 017d30cf-6911-4f74-b187-7432e7ca428e

Could you please activate this key? I'm building a bus tracking app that uses a backend proxy server to comply with the Terms of Service.