This is my route:

post/[id].tsx

And this my code:

export async function getStaticPaths() {
    return {
        paths: [{ params: { 'id': '200'} }],
        fallback: true
    };
}

export async function getStaticProps({ params }) {
    const res = await fetch(`https://api.com/${params.id}`)
    const post = await res.json()
    return { props: { post } }
}

I have 2 problems:

1- How can I pass my custom params to paths?

2- After run the code, my page rendered twice

I don't want get all ids in getStaticPaths