GraphQL has limited built-in scalar types. You can define your own scalar types. > The method and library to use depends on the GraphQL framework you are using. See this for how to define your own scalar types in apollo. - https://www.apollographql.com/docs/apollo-server/schema/custom-scalars/ ## Scalar Library Of course there are libraries that provide common scalar types. Simply add them to your resolver. - https://the-guild.dev/graphql/scalars/docs/quick-start