# MBTA

**Canonical:** https://apis.io/providers/mbta/  
**Website:** https://www.mbta.com/developers  
**APIs profiled:** 12

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.

## Kin Score — 34.0 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 34.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 50.1 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 22.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (12)

- **MBTA Alerts API** — Service disruption communications
- **MBTA Facilities API** — Stop amenities such as elevators and bike racks
- **MBTA Lines API** — Transit lines grouped by mode
- **MBTA Predictions API** — Real-time arrival and departure forecasts
- **MBTA RoutePatterns API** — Possible travel patterns within a route
- **MBTA Routes API** — Route information per line
- **MBTA Schedules API** — Scheduled stop times
- **MBTA Services API** — Operational dates and frequencies
- **MBTA Shapes API** — Trip route polylines for mapping
- **MBTA Stops API** — Boarding and disembarking locations
- **MBTA Trips API** — Vehicle journey definitions
- **MBTA Vehicles API** — Vehicle movement and position data

## Agentic access (1)

- **Mbta Agentic Access** — 22 operations

## Security (2)

- **Mbta Authentication** — apiKey · 2 schemes
- **Mbta Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Mbta Plans Pricing**

## Tags

Boston, Massachusetts, Public Transportation, Real-Time, Transit

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/mbta/). Scores are computed from the provider's own public artifacts under a published rubric.