appwrite/docs/examples/1.4.x/server-graphql/examples/databases/create-url-attribute.md

mutation {
    databasesCreateUrlAttribute(
        databaseId: "[DATABASE_ID]",
        collectionId: "[COLLECTION_ID]",
        key: "",
        required: false
    ) {
        key
        type
        status
        error
        required
        format
    }
}