There are a few ways to perform searches on the Taxonomy API. However, only one is the most correct one. You should filter by the site/marketplace you are looking for, and also, to improve the reading, it's better to also include the category on that search. Look here .

Taxonomy tree

In order to obtain the taxonomy tree for all available categories, you need to execute the following request:

curl -X GET \
  'https://api.olxgroup.com/taxonomy/v1/categories/' \
  -H "User-Agent: crm_name"
  -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -H 'X-API-KEY: your-api-key'

Which will return something like:

{
  "transaction_id": "213eaa40-2b9a-11e8-a8ac-b3d0e872f585",
  "message": "success",
  "data": [
    {
      "code": "urn:concept:realestate-for-sale",
      "label": "Realestate for Sale",
      "children": [
        {
          "code": "urn:concept:apartments-for-sale",
          "label": "Apartments for Sale",
          "children": null,
          "attributes": [
            {
              "code": "urn:concept:price-negotiable",
              "label": "Price Negotiable",
              "type": "select",
              "values": [
                {
                  "code": "urn:concept:no",
                  "label": "No"
                },
                {
                  "code": "urn:concept:yes",
                  "label": "Yes"
                }
              ]
            },
            {
              "code": "urn:concept:area-m2",
              "label": "Area (m2)",
              "type": "input",
              "values": []
            },
            {
              "code": "urn:concept:characteristics",
              "label": "Characteristics",
              "type": "multiple",
              "values": [
                {
                  "code": "urn:concept:alarm",
                  "label": "Alarm"
                },
                {
                  "code": "urn:concept:central-heating",
                  "label": "Central Heating"
                },
                {
                  "code": "urn:concept:safe",
                  "label": "Safe"
                },
                {
                  "code": "urn:concept:elevator",
                  "label": "Elevator"
                }
              ]
            }
          ]
        }
      ],
      "attributes": null
    }
  ]
}

In the previous example, we can see a first-level category called "Realestate for Sale". Within it, there's another category (under children) called "Apartments for Sale". This one has no children, but it does one attribute called Price Negotiable where you can find a couple of values, "Yes" and "No".

You can use the attribute types to help you decide how to best represent these elements on your front-end. For example, a type select corresponds directly to an HTML select box.

These are the supported attribute types:

Type	Description
select	Contains a list of values such as "yes" and "no"
input	Accepts a regular string
multiple	Contains a list of values but allows multiple selections

Get a single website

If you want to get the taxonomy tree for a single website, you just need to provide the corresponding site URN in the following request:

curl -X GET \
 'https://api.olxgroup.com/taxonomy/v1/categories/partner/urn:site:imovirtualcom' \
  -H 'Accept: application/json' \
  -H "User-Agent: crm_name"
  -H 'Content-Type: application/json' \
  -H 'X-API-KEY: <YOUR API KEY>'

Get a single category on a website

By combining the two filters, you can get a specific category on a single website:

curl -X GET \
 'https://api.olxgroup.com/taxonomy/v1/categories/partner/urn:site:imovirtualcom/urn:concept:apartments-for-sale' \
  -H 'Accept: application/json' \
  -H "User-Agent: crm_name"
  -H 'Content-Type: application/json' \
  -H 'X-API-KEY: <YOUR API KEY>'

And this last one should be the chosen one, to make any request to Taxonomy API.