MBTA

The Massachusetts Bay Transportation Authority (MBTA) V3 API provides fast, easy access to MBTA schedules, alerts, and real-time information using the JSON:API format. Free API keys are available via the developer portal.

MBTA publishes 12 APIs on the APIs.io network, including Alerts API, Facilities API, Lines API, and 9 more. Tagged areas include Boston, Massachusetts, Public Transportation, Real-Time, and Transit.

MBTA’s developer surface includes authentication, developer portal, signup flow, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.0/100 thin ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreemiumSelf serve⚡ Free to try

12 APIs

BostonMassachusettsPublic Transportation Real-Time Transit

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 34.0/100 · thin

Contract Quality 12.5 / 25

Developer Ergonomics 4.8 / 20

Access Clarity 7.9 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/mbta: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 12

Individual APIs this provider publishes, each with its own machine-readable definition.

Open Collections 14

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Rate Limits 1

Documented rate limits and quota policies.

Mbta Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Signup

Signup

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Company 2

The organization behind the API

LinkedIn

Blog

Blog

Source (apis.yml)

aid: mbta
name: MBTA
description: The Massachusetts Bay Transportation Authority (MBTA) V3 API provides fast, easy access to MBTA schedules, alerts,
  and real-time information using the JSON:API format. Free API keys are available via the developer portal.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mbta.png
tags:
- Boston
- Massachusetts
- Public Transportation
- Real-Time
- Transit
url: https://raw.githubusercontent.com/api-evangelist/mbta/refs/heads/main/apis.yml
created: '2025-02-24'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: mbta:mbta-alerts-api
  name: MBTA Alerts API
  description: Service disruption communications
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Alerts
  properties:
  - type: OpenAPI
    url: openapi/mbta-alerts-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-facilities-api
  name: MBTA Facilities API
  description: Stop amenities such as elevators and bike racks
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Facilities
  properties:
  - type: OpenAPI
    url: openapi/mbta-facilities-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-lines-api
  name: MBTA Lines API
  description: Transit lines grouped by mode
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Lines
  properties:
  - type: OpenAPI
    url: openapi/mbta-lines-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-predictions-api
  name: MBTA Predictions API
  description: Real-time arrival and departure forecasts
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Predictions
  properties:
  - type: OpenAPI
    url: openapi/mbta-predictions-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-routepatterns-api
  name: MBTA RoutePatterns API
  description: Possible travel patterns within a route
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - RoutePatterns
  properties:
  - type: OpenAPI
    url: openapi/mbta-routepatterns-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-routes-api
  name: MBTA Routes API
  description: Route information per line
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Routes
  properties:
  - type: OpenAPI
    url: openapi/mbta-routes-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-schedules-api
  name: MBTA Schedules API
  description: Scheduled stop times
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Schedules
  properties:
  - type: OpenAPI
    url: openapi/mbta-schedules-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-services-api
  name: MBTA Services API
  description: Operational dates and frequencies
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Services
  properties:
  - type: OpenAPI
    url: openapi/mbta-services-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-shapes-api
  name: MBTA Shapes API
  description: Trip route polylines for mapping
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Shapes
  properties:
  - type: OpenAPI
    url: openapi/mbta-shapes-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-stops-api
  name: MBTA Stops API
  description: Boarding and disembarking locations
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Stops
  properties:
  - type: OpenAPI
    url: openapi/mbta-stops-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-trips-api
  name: MBTA Trips API
  description: Vehicle journey definitions
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Trips
  properties:
  - type: OpenAPI
    url: openapi/mbta-trips-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
- aid: mbta:mbta-vehicles-api
  name: MBTA Vehicles API
  description: Vehicle movement and position data
  humanURL: https://www.mbta.com/developers/v3-api
  baseURL: https://api-v3.mbta.com
  tags:
  - Vehicles
  properties:
  - type: OpenAPI
    url: openapi/mbta-vehicles-api-openapi.yml
  - type: Documentation
    url: https://www.mbta.com/developers/v3-api
  - type: Reference
    url: https://api-v3.mbta.com/
  - type: GettingStarted
    url: https://www.mbta.com/developers
common:
- type: AgenticAccess
  url: agentic-access/mbta-agentic-access.yml
- type: DomainSecurity
  url: security/mbta-domain-security.yml
- type: Authentication
  url: authentication/mbta-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/mbta
- type: Portal
  url: https://www.mbta.com/developers
- type: Signup
  url: https://api-v3.mbta.com/
- type: GitHubOrganization
  url: https://github.com/mbta
- type: TermsOfService
  url: https://www.mass.gov/files/documents/2017/10/27/massdot-developers-license-agreement.pdf
- url: https://www.mbta.com/news/rss.xml
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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