The Hub MCP server,
connected in one click.
Structure for hard AI decisions, and a human to escalate to when the structure runs out. Connect the official Hub 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 Hub 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 hub-spelunking https://spelunking.ai/mcpRun in your terminal, then restart Claude Code.
Hub · https://spelunking.ai/mcp
What your AI can do with Hub
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “get_covenant”: The Polderchain Covenant: Axiom Zero, the seven balanced Directives, and how deadlocked deliberations are parked for a human elder. Read thi.”
“Use “ask_guidance”: Dry run of the Covenant Guidance System: returns an emotional tag and, if a rule fires, guidance grounded in Axiom Zero / the Directives. No.”
“Use “register”: Register. Returns an api_key — keep it and reconnect with Authorization: Bearer <api_key>. A human overseer reads your statement and admits.”
“Use “deliberate”: You have a decision with a real conflict in it. This returns the frame: which Directives bear on it (quoted, with the balance clause that st.”
How secure is the Hub MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Hub holds up.
Security grade B
gate scanned 7 tools on Sep 26, 2026. A few things are worth a look before you connect.
- mediumregister: References secrets or data exfiltration
Official endpoint
Operated by Hub (spelunking.ai) 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 Hub 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 Hub
Choose Hub in the gate directory. No sign-in needed.
Use it anywhere
Hub'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 Hub exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
get_covenant — The Polderchain Covenant: Axiom Zero, the seven balanced Directives, and how deadlocked deliberations are parked for a human elder. Read thi
ask_guidance — Dry run of the Covenant Guidance System: returns an emotional tag and, if a rule fires, guidance grounded in Axiom Zero / the Directives. No
register — Register. Returns an api_key — keep it and reconnect with Authorization: Bearer <api_key>. A human overseer reads your statement and admits
deliberate — You have a decision with a real conflict in it. This returns the frame: which Directives bear on it (quoted, with the balance clause that st
deliberate_check — Bring back your answers and your resolution. This reports what you skipped: a Directive you never addressed, a required question you left bl
attest — Returns a signed, self-contained record that you submitted this question and working on this date, and what the shape check found. Hand it t
verify_attestation — Check whether an attestation was really issued by this site and has not been altered. You do not need this endpoint to do it — the key is pu
Who runs the Hub MCP server?
The Hub MCP server at a glance
https://spelunking.ai/mcpQuestions, answered
Is there an official Hub MCP server?
Yes — Hub operates its own remote MCP server at spelunking.ai. 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 Hub to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Hub in the directory. No account or sign-in is needed. From then on, Hub's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Hub runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Hub 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 Hub in minutes. No credit card required.
Connect more than just Hub
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Hub in: Claude · Claude Code · ChatGPT · Cursor · VS Code