A basic migration from a JSON url feed

Source grabs it from the JSON feed, process does the mapping to the Drupal fields in the publication2 content type, and destination defines the content type it will map into:

id: publication_from_westernstubservices
label: 'UD host node migration for remote JSON source example'
migration_tags:
  - WS JSON Source
source:
  constants:
    TITLE_SUFFIX: ' (Imported from remote file)'

  plugin: url
  data_fetcher_plugin: http
  data_parser_plugin: json

  urls:
    - https://data.fs.usda.gov/research/westernstubservices/productsservices?station_id=PNW&unit_id=&days_changed=-1&station_mode_id=3&format=json
    #- modules/custom/ud_migrations/ud_migrations_json_source/sources/udm_remote.json

  # XPath-like selector. The slash (/) at the beginning is optional.
  item_selector: /response/products_services
  fields:
    - name: src_product_id
      label: 'Product ID'
      selector: product_id
    - name: src_title
      label: 'Title'
      selector: title
  ids:
    src_product_id:
      type: integer
process:
  title: src_title
  field_product_id2: src_product_id
destination:
  plugin: 'entity:node'
  default_bundle: publication2
  optional: []