Keep getting 404 errors

I'm a trying to use the GraphQL api. My queries work in graphiql, but no where else.

I'm using: https://my-repo-name.prismic.io/graphql

Whether I use Got or Axios, neither works. Also, neither allows sending a body/query in a GET request, but I still get errors when I use POST. I've gotten one 400 error if that helps at all.

This is my Got code:

(async () => {
  try {
    const body = await got.post("https://my-repo-name.prismic.io/graphql", {
      headers: {
        Authorization: process.env.ACCESS_TOKEN,
        "Prismic-Ref": "master",
        ref: "master",
      },
      body: `query{
       // ...a query that works in the graphql explorer...
        }
        allOur_valuess {
          edges {
            node {
              hero
            }
          }
        }
      }
      `,
      responseType: "json",
    });

    console.log(body.data);
  } catch (e) {
    console.log(e);
  }
})()

This is a duplicate thread: