Finance & crypto · Official remote MCP server

The Blackwall X402 Guardrail MCP server,
connected in one click.

Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt. Connect the official Blackwall X402 Guardrail MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Blackwall X402 Guardrail free How it works

Free to start · No credit card · No hosting needed

Use this server

Add Blackwall X402 Guardrail 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 blackwall-x402-guardrail https://mcp.blackwalltier.com

Run in your terminal, then restart Claude Code.

Blackwall X402 Guardrail · https://mcp.blackwalltier.com

What you can do

What your AI can do with Blackwall X402 Guardrail

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “forecast_payment”: Pre-signature x402 payment verdict: GO / HOLD / STOP for paying a counterparty, from settlement reputation, price-anomaly (quoted vs the pay.”

Security check

How secure is the Blackwall X402 Guardrail MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Blackwall X402 Guardrail holds up.

✓ Verified directory serverBlackwall X402 Guardrail · blackwalltier.com

Official endpoint

Operated by Blackwall X402 Guardrail (blackwalltier.com) 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 Blackwall X402 Guardrail adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on Blackwall X402 Guardrail's server →

How it works

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 Blackwall X402 Guardrail

Choose Blackwall X402 Guardrail in the gate directory. No sign-in needed.

Use it anywhere

Blackwall X402 Guardrail's tools are live in every AI client you've connected — with rules and logging built in.

Connect Blackwall X402 Guardrail free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Blackwall X402 Guardrail exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

forecast_payment — Pre-signature x402 payment verdict: GO / HOLD / STOP for paying a counterparty, from settlement reputation, price-anomaly (quoted vs the pay

Author

Who runs the Blackwall X402 Guardrail MCP server?

blackwalltier.com

Homepage More servers from blackwalltier.com →

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Server facts

The Blackwall X402 Guardrail MCP server at a glance

Endpointhttps://mcp.blackwalltier.com

Operated byBlackwall X402 Guardrail (blackwalltier.com)

CategoryFinance & crypto

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official Blackwall X402 Guardrail MCP server?

Yes — Blackwall X402 Guardrail operates its own remote MCP server at mcp.blackwalltier.com. 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 Blackwall X402 Guardrail to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Blackwall X402 Guardrail in the directory. No account or sign-in is needed. From then on, Blackwall X402 Guardrail's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Blackwall X402 Guardrail runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Blackwall X402 Guardrail 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.