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mbta.com/

MBTA V3 API

Freeauth: none for light use; free API key for 1,000 requests a minute and streamingCustom#transport-shipping#transit#boston#gtfs#api#government✓ verified Nov 12, 2026

MBTA V3 API

The Massachusetts Bay Transportation Authority's V3 API serves GTFS, GTFS Realtime and MBTA-specific data (routes, stops, schedules, predictions, vehicles, alerts and facilities) in JSON:API format, with streaming updates (api-v3.mbta.com).

Required Attribution:

Required: "Clearly acknowledge MassDOT as the provider of the Data."

Coverage

MBTA subway, bus, commuter rail and ferry services in the Boston area. The developer page says: "The V3 API presents General Transit Feed Specification (GTFS), GTFS Realtime, and MBTA-specific data." History start: Not stated.

Verdict

JSON:API (api-v3.mbta.com) for MBTA routes, stops, schedules, predictions, vehicles and alerts. Licensed Custom: the developer page says: "Use of MBTA data is governed by the MassDOT Developers License Agreement (PDF, 85.5 KB)." The agreement says: "MassDOT, subject to your acceptance of the Terms of this License Agreement, hereby grants You (Licensee) non-exclusive, limited, and revocable rights to use, reproduce, and redistribute the Data." and "MassDOT reserves the right to suspend or terminate the Data at any time without prior notice." Rate limits: the developer page says: "A valid key is required to make a default of 1,000 requests per minute, control the version, and stream requests." The keyless allowance is Not stated. Signal Lab links only.

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