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WebMCP Registry
The public index for WebMCP tool contracts
WebMCP is a new W3C standard that lets websites expose structured tools for AI agents via the browser. But there's no way to discover which sites have tools without visiting them directly — the spec authors flagged this themselves. WebMCP Registry fixes that. Submit your domain, verify ownership via DNS, and your tools become searchable via a free public API. The discovery layer the ecosystem needs.
Hey PH 👋
I built this over the weekend after reading the WebMCP spec and noticing the spec authors themselves flagged tool discoverability as an unsolved limitation.
Quick background: WebMCP is a W3C proposal (currently in Chrome origin trial) that lets websites expose tools directly to AI assistants — natively in the browser, no backend integration required. A tool is just a named action your site supports: add-to-cart, search-flights, create-task. You define the name, a description, and an input schema. When a user visits your site with an AI assistant active, the assistant sees those tools and can invoke them directly instead of trying to click through your UI or scrape your HTML.
The problem is discoverability. WebMCP tools are registered via JavaScript at runtime, they don't exist in HTML source. Crawlers can't find them. There's no way to know what tools a site exposes without actually loading and executing it. So agents have no way to know ahead of time what's out there.
The only clean solution is an opt-in registry with domain verification. Site owners publish what they support, agents know where to look.
That's what this is. You submit your domain, describe your tools, prove you own the domain with a DNS TXT record, and you're listed. Agents and developers can search the registry by domain or keyword and pull tool definitions via API before ever visiting a site. The read API requires no auth, it's meant to be queried freely.
I think this is day one infrastructure for a meaningful shift in how AI agents interact with the web. Would love feedback from anyone building agents or thinking about exposing tools from their own site.
https://webmcp-registry.dev
About WebMCP Registry on Product Hunt
“The public index for WebMCP tool contracts”
WebMCP Registry was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #160 on the daily leaderboard. WebMCP is a new W3C standard that lets websites expose structured tools for AI agents via the browser. But there's no way to discover which sites have tools without visiting them directly — the spec authors flagged this themselves. WebMCP Registry fixes that. Submit your domain, verify ownership via DNS, and your tools become searchable via a free public API. The discovery layer the ecosystem needs.
On the analytics side, WebMCP Registry competes within Web App, Developer Tools and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how WebMCP Registry performed against the three products that launched closest to it on the same day.
Who hunted WebMCP Registry?
WebMCP Registry was hunted by Jeffrey Nwankwo. 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 WebMCP Registry including community comment highlights and product details, visit the product overview.
Jeffrey Nwankwo