profile.vue

<template>
  <div>{{ page.profile.name }}</div>
</template>

<script>
export default {
  props: ['page']
}
</script>

saber-node.js

exports.onCreatePages = async function() {
  const profile = await fetchProfileFromApi()
  // e.g. { name: 'egoist' }
  
  await this.pages.createPage({
    profile,
    permalink: '/profile',
    slug: 'profile',
    layout: 'profile', // use `layouts/profile.vue`
    internal: {
      id: 'unique id'
    }
  })
}

https://saber.land/docs/page-interface.html
https://saber.land/docs/saber-instance.html#oncreatepages