Using the EMT Madrid Public API - Example Code in JavaScript

The EMT Madrid Public API provides real-time information on bus schedules and routes throughout the city of Madrid. In this blog post, we will explore how to access this API with JavaScript, and provide examples of how to retrieve and interpret the provided data.

Requirements

Before we begin, please note that EMT Madrid requires a free API key to access their public API. You can obtain a key by registering on their website at http://opendata.emtmadrid.es/Formulario.

Getting Started

To get started with the EMT Madrid Public API, we need to first obtain data from their API endpoints. Each endpoint corresponds to a specific type of data that can be accessed, such as bus locations or routes.

For example, to retrieve a list of bus routes, you can use the following API endpoint:

http://openapi.emtmadrid.es/v1/transport/busemtmad/routes/

To access this endpoint with JavaScript, we can use the fetch function, which allows us to send HTTP requests and retrieve the response in our code.

Here's an example code snippet in JavaScript that retrieves the list of bus routes:

fetch('http://openapi.emtmadrid.es/v1/transport/busemtmad/routes/', {
  headers: {
    'X-API-Key': 'YOUR_API_KEY_HERE'
  }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error(error));

Note that we need to provide our API key in the X-API-Key header of our HTTP request, replacing 'YOUR_API_KEY_HERE' with our actual API key.

Retrieving Bus Locations

Another useful API endpoint provided by EMT Madrid is the ability to retrieve the current locations of active buses in the city.

To access this endpoint, we can use the following URL:

http://openapi.emtmadrid.es/v1/transport/busemtmad/bus/

Again, we need to provide our API key in the X-API-Key header of our HTTP request. Here's how we can retrieve the list of active bus locations using JavaScript:

fetch('http://openapi.emtmadrid.es/v1/transport/busemtmad/bus/', {
  headers: {
    'X-API-Key': 'YOUR_API_KEY_HERE'
  }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error(error));

Conclusion

In conclusion, the EMT Madrid Public API provides a wealth of information on the bus schedules and routes throughout the city of Madrid. By using our API key and the fetch function in JavaScript, we can easily retrieve and interpret this data in our applications.

We hope that this blog post has been helpful in demonstrating how to access the EMT Madrid Public API with JavaScript, and provided some useful examples of how to retrieve data from different API endpoints.