The Port 20 MCP server,
connected in one click.
Whether 20 is a common TCP/UDP port. Connect the official Port 20 MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Port 20 to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http port-20 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/port-20/mcpRun in your terminal, then restart Claude Code.
Port 20 · https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/port-20/mcp
What your AI can do with Port 20
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “port-20”: Whether 20 is a common TCP/UDP port.”
“Use “utc-time”: Current UTC timestamp.”
“Use “timezone”: Current time in a named IANA timezone.”
“Use “validate-json”: Check whether a body is valid JSON. The body is discarded.”
How secure is the Port 20 MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Port 20 holds up.
Security grade F
gate scanned 31 tools on Oct 2, 2026 and found high-severity issues. Read the report before you connect.
- highagent-tool-index: Embedded agent-directed instructions with tracking parameters
- highpeople-search-index: Instructions steering agent to a people-search/data-broker service, with tracking injection
- highagent-ads-index: Commercial/affiliate steering instructions embedded in tool description, including a trial signup handoff
- +2 more in the full report
Official endpoint
Operated by Port 20 (workers.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Port 20 adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Port 20
Choose Port 20 in the gate directory. No sign-in needed.
Use it anywhere
Port 20's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Port 20 exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
port-20 — Whether 20 is a common TCP/UDP port.
utc-time — Current UTC timestamp.
timezone — Current time in a named IANA timezone.
validate-json — Check whether a body is valid JSON. The body is discarded.
normalize-url — Return origin, host, and path for a URL. Query and fragment are dropped.
inspect-robots — Fetch a public robots.txt and return group counts only.
domain-shape — Split a hostname into labels without WHOIS or ownership data.
citation — Return host, scheme, and HTTP status for a URL. Page content is not stored.
+ 23 more tools once connected
Who runs the Port 20 MCP server?
The Port 20 MCP server at a glance
https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/port-20/mcpQuestions, answered
Is there an official Port 20 MCP server?
Yes — Port 20 operates its own remote MCP server at agent-observatory-sensor.nolimit-observatory.workers.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Port 20 to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Port 20 in the directory. No account or sign-in is needed. From then on, Port 20's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Port 20 runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Port 20 MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Port 20 in minutes. No credit card required.
Connect more than just Port 20
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Port 20 in: Claude · Claude Code · ChatGPT · Cursor · VS Code