Cortex is an open source API knowledge layer that turns OpenAPI, AsyncAPI, GraphQL, gRPC, and OpenRPC specs into interactive documentation, typed SDKs in 11 languages, and MCP servers for AI agents.
Hey Product Hunt 👋
I’m Nick, and I built Cortex because being an engineer in the AI era means your APIs increasingly need to serve two very different users: developers and AI agents.
But supporting both often means doing the same work twice. You build documentation and SDKs for developers, then create separate MCP tools and context for agents.
Today, these pieces are usually maintained separately. They drift out of sync, create duplicate work, and leave AI agents trying to understand your API from incomplete or outdated context.
Cortex makes your API contract the source of truth.
Give it your OpenAPI, AsyncAPI, GraphQL, gRPC, or OpenRPC specs, plus Markdown, and Cortex generates:
📚 Interactive documentation for developers
⌨️ Typed SDKs across 11 languages
🤖 MCP servers with typed tools and grounded API context
Everything is open source and MIT licensed. You can customize the templates, publish the SDKs wherever you want, and host the generated documentation yourself.
The idea is simple: define your API once, then give every developer and every agent the interface they need to actually use it.
Check out the open source repo at https://github.com/cortex-docs/c...
I would love feedback from teams building APIs, SDKs, developer tools, and agent integrations.
What would make Cortex more useful in your workflow?
About Cortex on Product Hunt
“Turn API specs into docs, SDKs, and MCP servers”
Cortex launched on Product Hunt on September 12th, 2026 and earned 239 upvotes and 32 comments, earning #2 Product of the Day. Cortex is an open source API knowledge layer that turns OpenAPI, AsyncAPI, GraphQL, gRPC, and OpenRPC specs into interactive documentation, typed SDKs in 11 languages, and MCP servers for AI agents.
On the analytics side, Cortex competes within API, Open Source, Developer Tools and GitHub — topics that collectively have 728k followers on Product Hunt. The dashboard above tracks how Cortex performed against the three products that launched closest to it on the same day.
Who hunted Cortex?
Cortex was hunted by fmerian. 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 Cortex including community comment highlights and product details, visit the product overview.
fmerian