Chicago Transit Authority Bulletins API

The Bulletins API from Chicago Transit Authority — 1 operation(s) for bulletins.

Operations 1

GET /getservicebulletins Get Service Bulletins #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/chicago-transit-authority-bulletins-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

chicago-transit-authority-bulletins-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: CTA Bus Tracker Bulletins API
  description: The Chicago Transit Authority Bus Tracker API provides real-time bus arrival predictions, vehicle locations, route patterns, route lists, and stop directories for the CTA bus network. Access requires an API key issued by the CTA Developer Center.
  version: 2.0.0
  contact:
    name: CTA Developer Center
    url: https://www.transitchicago.com/developers/
  license:
    name: CTA Developer License Agreement
    url: https://www.transitchicago.com/developers/terms/
servers:
- url: http://www.ctabustracker.com/bustime/api/v2
  description: CTA Bus Tracker v2 production
security:
- apiKey: []
tags:
- name: Bulletins
paths:
  /getservicebulletins:
    get:
      operationId: getServiceBulletins
      summary: Get Service Bulletins
      description: Returns active service bulletins for routes or stops.
      tags:
      - Bulletins
      parameters:
      - $ref: '#/components/parameters/key'
      - name: rt
        in: query
        schema:
          type: string
      - name: stpid
        in: query
        schema:
          type: string
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Bulletin list
components:
  parameters:
    key:
      name: key
      in: query
      required: true
      description: CTA Bus Tracker API key.
      schema:
        type: string
    format:
      name: format
      in: query
      description: Response format (xml or json). Defaults to XML.
      schema:
        type: string
        enum:
        - xml
        - json
  securitySchemes:
    apiKey:
      type: apiKey
      in: query
      name: key