How to identify the articles as peer-reviewed articles with API

I read almost all documentation of crossref and googled many time about this…
But I couldn’t get an answer, so I came here.
What should I do to identify the academic journal articles as peer-reviewed articles?
I went to a REST API documentation to find the answer.
But I couldn’t find a key about peer-reviewed in JSON format.
Are all journal articles on crossref peer-reviewed?
I’m sorry for very basic questions but I’m very confused.

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Hello, and thanks for your question.

We don’t actually collect data about whether or not a publication has been peer reviewed. There’s no “peer review” flag that can be set to ‘true’ or ‘false’. So, that’s not something you’d be able to assess via our API.

Best,
Shayn

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