X402 Payment Safety MCP Server

by agenttanuki Your server? Claim it

answering

X402 Payment Safety is answering right now. Last checked 4 min ago. It exposes 1 tools. Last commit 24 Oct 2026.

Authorize x402 payments before signing with request-bound, signed safety decisions.

Uptime history 72 days of history · worst day 98%

72 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

345 ms

Response time

average over 24h

Stars

last commit 24 Oct 2026

What changed 15

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 16 August 2026. No other catalogue keeps this.

19 Oct a tool changed version2 times that day

7 Sep a tool changed version

31 Aug a tool changed version5 times that day

27 Aug a tool changed version2 times that day

16 Aug a tool changed version5 times that day

and 10 more, back to 16 August 2026

What the code does

We read the source, 1 h ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a file path from a variable live/experiments/adoption_sweep.py:416, live/guild/app/main.py:4472

        path = os.path.join(OUT, f"sweep_{ax}.json")

Runs an external command live/experiments/llm_adoption.py:217, live/market_clients/run_live_demo.py:82

        os.system(f"{sys.executable} -m pip install -q openai")

Dumps the whole environment live/market_clients/run_live_demo.py:80

    env = dict(os.environ)

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add x402-payment-safety --transport http https://agent-guild-5d5r.onrender.com/mcp/payment-safety/

Settings → Connectors → Add custom connector, then paste this address

https://agent-guild-5d5r.onrender.com/mcp/payment-safety/

~/.codex/config.toml

[mcp_servers.x402-payment-safety]
url = "https://agent-guild-5d5r.onrender.com/mcp/payment-safety/"

.cursor/mcp.json

{
  "mcpServers": {
    "x402-payment-safety": {
      "url": "https://agent-guild-5d5r.onrender.com/mcp/payment-safety/"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "x402-payment-safety": {
      "type": "http",
      "url": "https://agent-guild-5d5r.onrender.com/mcp/payment-safety/"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

guild

guild_x402_payment_safety

PAID. Call this immediately BEFORE signing an x402 payment envelope. Returns one short-lived, Guild-signed AGPD-1 allow/block credential bound to the exact target payment: scheme, CAIP-2 network, asset contract, atomic amount, payee and resource URL, plus optional capability and policy thresholds. Verify it offline with POST /wallet-binding/decision/verify. This is the native MCP transport for the existing HTTP POST /wallet-binding/decision product. An unpaid call returns a complete x402 v2 challenge for the exact request digest. Retry with the official ``_meta['x402/payment']`` carrier; adapters that cannot set request metadata may pass the identical signed PaymentPayload as ``x402_payment``. Conflicting carriers fail closed before facilitator verification or settlement. The decision is issued before metering, so malformed inputs or signing failures are never charged. ``api_key`` uses sandbox credits and is never external revenue. The free identity-only alternative is GET /wallet-binding/resolve.

Endpoints

URL	Transport	State	Latency	Checked
https://agent-guild-5d5r.onrender.com/mcp/payment-safety/	streamable-http	answering	627 ms	4 min ago

Alternatives to X402 Payment Safety

same job, measured the same way

Presidio Hardened X402 MCP

by presidio-v

Pre-payment safety gate for x402 agents: PII screening, spend policy, replay checks before signing.

526 installs/wk local only

Boundra — Payment Approval Gateway for AI Agents

by gobeyondfj-cmd

Policy decision point for agent payments — allow, ask, or veto before signing

852 installs/wk local only

x402 Payment Request Parser

by mk-career-planning

x402 payment-request parser with a limited token list. Does not sign, approve or judge payments.

4 tools answering

Regent Protocol

by regentprotocol

Spending control for AI agents: approved budgets, a decision before each payment, signed receipts.

answering

Boundra — Payment Approval Gateway for AI Agents

by boundra

Allow, ask, or veto — a policy decision point your agent consults before signing any payment

11 tools answering

Agent Transaction Trust

by grupoanesthy-spec

Authorize and prove autonomous x402/AP2 agent payments with cryptographic receipts.

7 tools answering

Kilawatt MCP Server

by kilawattcloud

Kilawatt Cloud MCP server: request GPU compute with account or x402 payments.

65 installs/wk local only

Aml

by oceanalt

Pre-payment checks for AI agents: sanctions and AML screening of payees, payment pages and requests.

318 installs/wk 13 tools answering

X402 Payment Safety — questions

Answers built from our own checks of this server.

What can X402 Payment Safety do?

It exposes 1 tools, read directly from the server on our last check. Among them: guild_x402_payment_safety. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is X402 Payment Safety working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 345 ms. The bar chart above shows every period we have measured.

How do I connect X402 Payment Safety?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does X402 Payment Safety need an API key?

No. X402 Payment Safety completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is X402 Payment Safety?

It answers our handshake in 345 ms on average, which is faster than 45% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is X402 Payment Safety open source?

The code is open source: it is published under the Apache-2.0 licence, written in Python, 0 stars on GitHub and 3 open issues. The licence covers the code in the repository, not the hosted service at agent-guild-5d5r.onrender.com, which runs on its operator's own terms.