Transport for Sweden SDKs & Libraries (2026)

SDKs overview

Transport for Sweden's digital services, primarily exposed through the Trafiklab platform, offer developers access to a range of public transport and traffic information APIs. These APIs include data for journey planning (Resrobot), real-time traffic updates (Trafikinfo API), and more general open data access (OpenAPI). Unlike some platform providers, Transport for Sweden and Trafiklab do not currently release official, first-party Software Development Kits (SDKs) in various programming languages. Instead, developers are expected to interact directly with the RESTful API endpoints using standard HTTP clients and libraries available in their chosen programming environments.

This approach gives developers flexibility in how they integrate with the APIs, allowing them to use any language or framework that supports HTTP requests. However, it also means that common tasks like authentication, request formatting, and response parsing must be handled manually or by using generic HTTP client libraries. For specific language implementations, the community has developed various libraries to simplify interaction with Trafiklab's APIs. While not officially maintained or supported by Trafiklab, these community efforts aim to reduce boilerplate code and streamline development.

Official SDKs by language

As of 2026, Transport for Sweden, through its Trafiklab initiative, does not provide official SDKs for direct integration with its APIs. Developers are directed to use the published API documentation for each service (e.g., Resrobot, Trafikinfo API, Realtime API) and construct HTTP requests manually or using generic client libraries. This model is common for many API providers, such as those documenting their services using OpenAPI Specification, where client code can be generated but is not always maintained as a first-party SDK.

The lack of official SDKs means that developers are responsible for managing HTTP requests, parsing JSON/XML responses, and handling API authentication (typically via API keys obtained after registration on Trafiklab). This requires a foundational understanding of web communication protocols and data serialization formats.

Installation

Given the absence of official SDKs, installation primarily involves setting up a development environment capable of making HTTP requests and parsing responses. For languages like Python, JavaScript, Java, or C#, this typically means installing a robust HTTP client library. Examples of such libraries include:

• Python: requests
• JavaScript (Node.js/Browser): axios or the native fetch API
• Java: HttpClient (built-in since Java 11) or OkHttp
• C#: HttpClient (built-in)

These libraries are installed using the respective language's package manager. For instance:

• Python: pip install requests
• Node.js: npm install axios or yarn add axios
• Java: Add dependency to your pom.xml (Maven) or build.gradle (Gradle) for OkHttp.

After installation, these libraries provide methods for making GET, POST, PUT, and DELETE requests, handling headers (including your API key), and parsing the JSON or XML data returned by Trafiklab's APIs. For instance, the Trafikinfo API v2 often returns XML, while other services might favor JSON.

Quickstart example

This example demonstrates how to fetch data from a hypothetical Trafiklab API endpoint using Python's requests library. Replace YOUR_API_KEY and the API endpoint with actual values from your Trafiklab API registration.

import requests
import json

API_KEY = "YOUR_API_KEY" # Replace with your actual API key from Trafiklab
BASE_URL = "https://api.trafiklab.se/some/api/v1/"
ENDPOINT = "journey-planner/trips"

headers = {
    "Accept": "application/json",
    "Authorization": f"Bearer {API_KEY}" # Some Trafiklab APIs might use different auth methods, consult docs
}

params = {
    "origin": "Stockholm C",
    "destination": "Malmö C",
    "date": "2026-06-01",
    "time": "10:00"
}

try:
    response = requests.get(f"{BASE_URL}{ENDPOINT}", headers=headers, params=params)
    response.raise_for_status() # Raise an HTTPError for bad responses (4xx or 5xx)
    data = response.json()
    print(json.dumps(data, indent=2))

except requests.exceptions.HTTPError as errh:
    print(f"Http Error: {errh}")
except requests.exceptions.ConnectionError as errc:
    print(f"Error Connecting: {errc}")
except requests.exceptions.Timeout as errt:
    print(f"Timeout Error: {errt}")
except requests.exceptions.RequestException as err:
    print(f"Something Else: {err}")

# Example for an API returning XML (e.g., Trafikinfo API v2)
# import xml.etree.ElementTree as ET
# 
# XML_ENDPOINT = "https://api.trafiklab.se/trafikinfo/v2/some-xml-data"
# 
# xml_response = requests.get(XML_ENDPOINT, params={"key": API_KEY})
# xml_response.raise_for_status()
# root = ET.fromstring(xml_response.content)
# for child in root:
#     print(child.tag, child.attrib)

This snippet demonstrates a basic GET request with headers and query parameters. For complete and accurate API interaction, always refer to the official Trafiklab API documentation for specific endpoints, required parameters, authentication methods (e.g., query parameter vs. Authorization header), and response formats (JSON or XML).

Community libraries

While Trafiklab does not offer official SDKs, the developer community has created several libraries to simplify interaction with its various APIs. These libraries are typically open-source and maintained by volunteers, meaning their maturity, feature set, and support can vary. Developers should evaluate these options based on their project requirements and the library's active development status.

Here's a conceptual table of typical community library offerings you might find for such APIs:

When considering a community library, it is advisable to check its GitHub repository (or similar platform) for:

• Last commit date: Indicates recent activity.
• Number of contributors: Suggests broader community engagement.
• Open issues/pull requests: Reflects ongoing development or potential problems.
• Documentation: Quality and completeness of usage instructions.
• License: Ensure compatibility with your project's licensing requirements.

For some APIs, a client library generator might be used if an OpenAPI or Swagger definition is available. This can create a basic client in various languages, offering a starting point for interaction even without a dedicated, hand-maintained SDK.