Migrate from the v3 News API - newscatcher

The v3 News API keeps working, and its docs stay under Enterprise in the version menu. Move to the new /search when you want ranked, story-grouped results for recent news. Stay on v3 when you need every match of a boolean query, deep pagination or the full archive.

Requests

v3	New News API
`https://v3-api.newscatcherapi.com/api/search`	`/search` (`GET` or `POST`)
`x-api-token` header	`x-api-key` header
`q` (boolean)	`q`: plain words or keywords with `AND`, `OR`, `NOT`
`lang`, `not_lang`	`languages`, `not_languages`
`countries`, `not_countries`	`countries`, `not_countries`
`sources`, `not_sources`	`sources`, `not_sources`
`sort_by`: `relevancy`, `date`	`sort_by`: `relevancy`, `published_at`, `crawled_at`
`from_`, `to_`	`search_window` (`2h`, `7d`), up to the last 30 days
`page_size`	`limit`, 1 to 100
`page`	No pagination: results are the best `limit` articles
`clustering_enabled`	Always on: every result has a `story`
`include_nlp_data`	`include` (Enterprise)

Responses

v3	New News API
`articles`	`results`, in the order of `sort_by`
`total_hits`, `total_pages`	`count`: the number of results returned
`cluster_id`, per response page	`story.id` on every result, and `/stories/{story_id}` for its articles
`nlp.summary`	`summary` when the article has one, and `summary_en` for non-English articles
`domain_url`	`source.domain`