V2 API cannot be accessed with project api token

[Pasukaru]

This is related to (write operations not working):

API v2 cannot be accessed with project specific API token

I trigger an new pipeline with v2 API as described here: https://github.com/CircleCI-Public/api-preview-docs/blob/master/docs/api-changes.md#post-projectproject_slugpipeline Works like a charm if I use one of my Personal API token. But it does not work if I create a project specific API permission token (in project_slug), response from post: “Project not found”

However, even read-only operations are not working.
I created a Project API token (scope: all), and when I try to access a pipeline via

curl "https://circleci.com/api/v2/project/${PROJECT_SLUG}/pipeline/1092?circle-token=${CIRCLE_TOKEN}"

I get this response:

{
  "message" : "Pipeline not found"
}

Changing CIRCLE_TOKEN to my personal token and leaving everything else unchanged, the request works.