3. Miscellaneous AX improvements
- Our 404 now returns markdown to agents
- Our MCP server card has been republished in conformance with the standard
- Our llms.txt is now discoverable from our homepage
- Our MCP handshake now shares a title, description, icon, and instructions
- We're now returning a Poppy manifest, and plan to support Poppy-based agent auth very soon
Going forward, "Agents" will be the home for ensuring that your application can (or cannot) be accessed by agents.
This will include configuration for other protocols like Poppy, as well as any agent-specific configuration (e.g. Codex, Claude, Grok, Muse, Instinct).
Use agents to build and maintain your application with Clerk:
"List the five most recent sign-ups."
"Create a test user in the development instance."
"Set the DNS records for production."
Long overdue ship: actually useful @clerk MCP server tools! Give it a whirl. Let us know what you like and what sucks... and direct through X/twitter, or better yet, get your agents to yell at us via the feedback tool. 🤖 🤝 🍪
clerk.com/changelog/2026-10-…
Clerk's infrastructure team is improving reliability across every layer of the user management stack.
We recently added redundancy to authentication emails to ensure users can still sign in even if one vendor goes down:
Fun fact - @clerk now has a backup email provider under the hood, so that if our primary email provider has an outage, your auth is still not impacted. Both providers use entirely different infrastructures, so an AWS or GCP outage can't take them both down.
It takes a ton of work to get features like this in place, the many subtle differences between two different providers add up across your customer-facing logs and codebase surfaces. I'm not aware of any other providers that do this.
Most people don't know about it at all. It's not a big flashy exciting feature, but often times invisible reliability work is the most important work 🤝
Come get some miles in with us and @Resend next Tuesday ☀️
We’re sponsoring the Resend Running Club at Crissy Field. Run, jog, or walk, then stick around for snacks and drinks.
Oct 20 · 7:30am · SF
See you by the bridge.
Add our updated plugin to your agent of choice with:
npx plugins add clerk/skills
Or consume our MCP server directly at:
mcp.clerk.com/mcp
Authenticated Agents are *finally* close, and they're moving fast 🚀
MCP is clearly leading for enterprise use-cases, while Poppy is generating excitement for consumer.
Our team is following closely to make sure the latest innovations are built-in to Clerk. Starting tomorrow, we'll be sharing two updates every week, right here on X:
Wednesday
Agent Readiness for @clerk: updates to how your coding agents can configure Clerk and interact with your user data
Friday
Agent Readiness for You: updates to how agents from ChatGPT, Claude, Grok, Muse, Instinct can access your application
Congrats to @tannerlinsley and the whole @tan_stack team on Start 1.0. So much work went into this, and we're proud to be part of it.
If you've been waiting to build with Start, then today's a good day. We'll help get your users signed in.
TanStack Start 1.0 is officially stable! 🎉
A full-stack web framework for React and Solid, already used to build millions of apps, from Fortune 500 companies to your favorite tools and weekend projects.
tanstack.com/start
