Web Services

The EASIN RESTful Web Services enable users to query and retrieve species information from the EASIN Catalogue in the form of JSON objects.

The users can select records by species scientific name, their environment, impact, taxonomy, or species of Union concern (Implementing Regulation (EU) 2016/1141; Commission implementing Regulation 2017/1263)

The services main web page can be found at https://easin.jrc.ec.europa.eu/api and the base URL, for all the web services call, can be found at https://easin.jrc.ec.europa.eu/api/cat

A skip/take mechanism is implemented to enable the retrieval of records in sets, facilitating this process when large numbers of records result from a specific query. For example, in the following URL: https://easin.jrc.ec.europa.eu/api/cat/env/fw/take/50/skip/100 the service is querying for freshwater species in the EASIN catalogue skipping the first hundred records and taking the next fifty.

It is possible to filter and retrieve species by:


Substitute the {term} with the species scientific name or part of it. It may lead to zero or more results. The minimum number of characters to start the search is three.


Substitute the {environment} with one of the abbreviations MAR or FW or TER or EST to filter species by, marine, freshwater, terrestrial or estuarine environments respectively.

Species of Union Concern

Species of Union Concern: retrieves all the species of Union Concern.


Substitute {impact} with “hi” to select species with “high impact”, or “lo” to select species “low or unknown impact”.

Taxonomy (single level)

Substitute {taxa} with Kingdom, Phylum, Class, Order or Family, and {taxa name} with the respective taxa names of interest.

Taxonomy (full)

Follows the same logic as for taxonomy single level, by adding the additional taxonomic levels and names to the search to the search form.

The resulting JSON is mainly intended to be used as a data transfer format, to enable machine-to-machine interaction, or as a base format to download and transform in tabular or human readable format.

There are several online tools available to users to convert the query results (JSON data) in commonly used formats, e.g. CSV, Excel. For instance:

1. Type the link https://easin.jrc.ec.europa.eu/api/cat/term/{term} on your browser.

2. Substitute the {term} with a species scientific name or part of the name, e.g. https://easin.jrc.ec.europa.eu/api/cat/term/Procambarus; press enter.

3. The above query, when run in Firefox, would return the result (by default) as depicted in figure 1. In this example, seven species were found (0 to 6), For each species, the service allows the extraction of species common names, impact, year and country of first introduction, environment, pathways of introduction taxonomy, etc, shown collapsed in figure 1. Information concerning species number 6 is presented in expanded view. The web service output might be displayed as easin Figure 2, which is the default output when the service is run in Chrome.

4. Copy and paste the result in one of the following tools:

Download: Pdf format

Figure 1 Result of the EASIN web service query for Procambarus, when run in Firefox https://easin.jrc.ec.europa.eu/api/cat/term/Procambarus

Figure 2 Result of the EASIN web service query for Procambarus, when run in chrome https://easin.jrc.ec.europa.eu/api/cat/term/Procambarus