Hqgis is a python based plugin for QGIS that offers access to the HERE API and combines different traffic/routing/geocoding actions in one plugin. With Hqgis you can geocode single and multiple addresses, find routes, places of interests around a or multiple locations and many more. This plugin is designed to work in QGIS 3.4 and above.

Thank you: @zoefSmoelt

The Hqgis plugin comes with different analytical tools as the HERE API povides different endpoints:

• Geocode

  With the three tools you can geocode a single address, choose a point layer / delimited layer with an address field or a layer with dedicated address-content fields (like street, city, zip code, etc.). You will receive a single point memory layer with found addresses, quality indicators and the original searched address/address content.

• Routing

  Currently the toolset supports one-to-one routing ("manual input") using different routing types (fast, short, balanced) and routing modes (pedestrian, bicycle, car, ...). The reuslt will be added as a memory layer to your QGIS project.

• POI search

  Using the POI search you can query the HERE API for places of interest around an address/coordinate pair in a given vicinity (radius). The API will respond with a maximum of 100 search results in the categories you queried.

• Isochrone Analysis

  Isochrones, or lines of equal (travel) times are possible to calculated using different modes and types as well as for different times of the day. This can be done on a single address/map point or using a point layer. The result will be color coded (categorized) in QGIS in red (long travel times/distances) to grenn (short travel times/distances). Find some nice examples at Topi Tjukanovs Homepage.
  

Currently the plugin is only hosted here on github as the version is premature. If you want to use it in QGIS, please download the repository and place the content of the zip in your python plugins folder (linux: /home/USER/.local/share/QGIS/QGIS3/profiles/default/python/plugins / win: C:\Users\USER\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins). You can also install it directly in QGIS using the plugin from ZIP option

The plugin needs to have credentials from HERE. Therefore you need to register at least a freemium account (free of charge at HERE.com by creating a project and generate a REST API Key if not already generated. Fill in the generated API Key in the credentials-tab of the plugin and click on "save credentials".

The credentials will be stored for convenience in a file called credentials.json in the creds subfolder of your Hqgis plugin folder (linux: /home/USER/.local/share/QGIS/QGIS3/profiles/default/python/plugins / win: C:\Users\USER\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins).

Please take a look at the Terms and Contitions when using the Freemium plan (as most people might want to...). Furthermore: According to the Acceptable Use Policy you're not allowed to store the results. Yet you can use them cached aka work with the memory layer for 30 days max. Further Questions and Answers can be found at the FAQ page as well as the main page of the freemium model.

The plugin is using the requests module at the current stage and is not respecting any proxy settings from QGIS.