MCP is the open standard for connecting AI to tools — and Catalyst speaks all of it. Connect a tool server running on your own machine or in the cloud; secure sign‑in is handled for you. Catalyst discovers each server's tools automatically and keeps the connection alive, so the model sees new tools the moment a server comes online. Tools run on Catalyst's servers, not in your browser — your keys stay where they belong.
Paste a command or a URL. Catalyst connects, lists the tools, and adds them to your chat toolbar. No code to write, nothing to glue together.
Your files, git, a local database, your own scripts — anything that speaks MCP. Catalyst starts it up, keeps it running, and talks to it for you.
npx @modelcontextprotocol/server-filesystem ~/projects Hosted servers — Linear, Notion, Stripe, your own internal services. Paste the URL and sign in once (secure sign‑in is handled for you), and the server's tools are ready in chat, workflows, and agents.
https://mcp.linear.app/sse For long‑running tools that report progress as they go — image generation, web crawls, background queries. Updates stream straight into the chat in real time, so you watch the work happen instead of waiting on a spinner.
data: {"tool":"crawl","progress":42} Your list of servers is stored privately, locked to your account. The tools themselves run on Catalyst's servers, never in your browser — so your keys and tokens never touch the page.
The moment a server connects, Catalyst reads its list of tools and hands them to the model. Added new tools on the server? Refresh it and they're available the next turn.
Servers that need a login are handled for you — secure sign‑in, with access kept up to date automatically. Your credentials stay on Catalyst's servers and never pass through the chat in your browser.
Each server shows Active, Connecting, or Error in real time, with the actual error message — so when something breaks, you know whether to restart it, sign in again, or check the service itself.
Your servers belong to you. No one else on the platform can list them, run them, or even see they exist.
Catalyst manages every connection for you — reusing them, reconnecting when one drops, and speaking the right version of the protocol with each server. Built on proven, battle‑tested foundations, so you never have to think about any of it.
A tool you connect once shows up in chat, in workflows (as a tool step), and in agents — ready to use everywhere, with nothing to set up twice.
The MCP servers page shows everything you've connected — name, type, status, number of tools — with one tap to add another. Your chat toolbar updates right away. No deploys, no rebuilds, nothing to code.
If it speaks MCP — and increasingly, everything does — Catalyst can call it. From chat, from workflows, from agents. One platform, every tool.