In the last post we built up two Frontend Apps, one using Next.js and another using Leptos (Rust/WASM). In this post we will be building an API that our Apps can talk to. See the full overview of posts here.

At the end of this post we will have:

• A Federated GraphQL API using Apollo Federation v2.
• A supergraph, using Apollo Router, composing our services into a single GraphQL API.
• Three small Rust-based GraphQL Subgraphs.
• Automatic deployment of our services to AWS Lambda.

There is quite a lot to cover. My recommendation is to clone down the Part 4 branch in the GitHub repository and use this post as an explanation of what is set up.

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Summary

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