page_not_found

404 not_found. No model declares that page and no read has reported it.

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HTTP status	`type`	Surfaces
404	`not_found`	REST

What it means

No model declares that page and no read has reported it.

When
`GET /api/pages/{page}` names a page that no model declares and no read has reported

Use a page from the page list.

entry_not_found

404 not_found. No entry with that id is visible to this key.

route_not_found

404 not_found. No route under /api/ matches the method and path you sent.