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Anvil SDK
The Next.js of AI backends
Anvil is a backend framework built for a world where APIs get called by both browsers and AI agents. Write one route file, you get a REST endpoint, an MCP tool, and an A2A skill, all sharing the same schema, checked at build time. No hand-wiring MCP SDKs on top of Express, no duplicating validation across three layers.
Hey Product Hunt 👋
I built Anvil because I wanted an Express-level flexible backend framework with Next.js-style file routing and real compile-time schema validation, without wiring up a dozen separate libraries for auth, rate limiting, observability, and crash recovery on every project.
One route file gives you a type-safe REST endpoint out of the box. Auth, sessions, rate limiting, tracing, and crash-resumable checkpointing come with the framework, not bolted on later.
Since a lot of what I build these days touches AI, Anvil also has an optional layer for that: expose any route as an MCP tool or A2A skill, or add a full agent runtime with tool-calling, streaming, multi-model fallback, evals, and memory/RAG. None of it is required, it's there when you need it.
200+ tests, still actively hardening a few areas (validation coverage, streaming, vector store adapters, sandboxing), roadmap's open, feedback welcome.
Would love for you to try `npx anvil init` and tell me what breaks. 🙏
About Anvil SDK on Product Hunt
“The Next.js of AI backends”
Anvil SDK was submitted on Product Hunt and earned 0 upvotes and 5 comments, placing #72 on the daily leaderboard. Anvil is a backend framework built for a world where APIs get called by both browsers and AI agents. Write one route file, you get a REST endpoint, an MCP tool, and an A2A skill, all sharing the same schema, checked at build time. No hand-wiring MCP SDKs on top of Express, no duplicating validation across three layers.
On the analytics side, Anvil SDK competes within API, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Anvil SDK performed against the three products that launched closest to it on the same day.
Who hunted Anvil SDK?
Anvil SDK was hunted by Subhadip Saha. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Anvil SDK including community comment highlights and product details, visit the product overview.
Subhadip Saha