searxng/searx/templates/opensearch.xml

<?xml version="1.0" encoding="utf-8"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
  <ShortName>searx</ShortName>
  <Description>Search searx</Description>
  <InputEncoding>UTF-8</InputEncoding>
  <LongName>searx metasearch</LongName>
  {% if method == 'get' %}
    <Url type="text/html" method="get" template="{{ host }}?q={searchTerms}"/>
  {% else %}
    <Url type="text/html" method="post" template="{{ host }}">
      <Param name="q" value="{searchTerms}" />
    </Url>
  {% endif %}
</OpenSearchDescription>