Agent Signal

Monday digest for agent builders

Free · Mondays · No account

What changed for agent builders this week.

Agent Signal is a short Monday email for people shipping agents and vibe-coding tools they intend to keep, plus a public directory of MCP servers with the auth catch written down.

The Monday note

Four things, then stop.

One email. No course, no paywall, no thread of “10 tools that will replace your job.” The first issue goes out once this list is connected to Resend.

  1. 01
    MCP servers that shipped, changed auth, or quietly broke.Remote URLs move. Read-only modes show up. Archived reference servers stay in old tutorials.
  2. 02
    Tooling releases that matter if you are building agents.SDKs, client apps, and the one flag that changes what the model is allowed to touch.
  3. 03
    A setup note the README skips.The command, the header, the scope to turn on before you point an agent at production.
  4. 04
    What to ignore.Renamed packages, archived servers, and launch posts that are the same product twice.

Who it is for

Builders

People wiring MCP servers into a client, a product, or an internal agent and who need the current URL, not last spring’s gist.

Vibe coders

People shipping with an agent in the loop who want a Monday scan of what is worth installing, and what will just burn context.

Servers worth installing first

15 entries in the public directory, each with a homepage, auth notes, a setup snippet, and a last-verified date. Shown here as checked on 6 Nov 2026.

  • GitHub

    GitHub's official MCP server for repositories, issues, pull requests, and Actions. Use this, not the archived reference server.

    Remote HTTPSOfficial · Remote · Source control

  • Cloudflare

    Cloudflare's family of remote MCP servers for docs, Workers, observability, and the rest of the platform.

    Remote HTTPSOfficial · Remote · Infrastructure

  • Playwright

    Microsoft's Playwright MCP server. The model drives a browser through the accessibility tree instead of screenshots.

    Local stdioOfficial · Local · Browser

  • Filesystem

    Reference MCP server for reading and writing files inside directories you explicitly allow.

    Local stdioReference · Local · Files

Browse the directory

Get Monday’s note

The form posts to /api/subscribe. With Resend configured, that address is added to the digest segment. Without it, local preview tells you plainly that nothing was stored.