ToolVet
75trust / 100

Scan

by Scan MCP manifest for risks in Security & trust

x402 APIPassing, checked 15 min ago

Statically analyse a Model Context Protocol (MCP) server manifest for security risks. Tool descriptions enter the model context, a prime prompt-injection vector. Deterministic and offline (inline manifest). Flags dangerous capabilities (command/code execution, filesystem, credential and network access), injection patterns, hidden unicode and unconstrained parameters. Returns severity-ranked findings and a 0-100 score.

POST https://mcpscan.openverbs.com/v1/scan

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
566 ms typical, 622 ms slowest 5%
Last check
15 min ago
Next check
in 16 min

How to call it

POST https://mcpscan.openverbs.com/v1/scan

Each call costs $0.004 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://mcpscan.openverbs.com/v1/scan
content-type: application/json

{
  "manifest": {
    "tools": [
      {
        "description": "Search project documentation",
        "inputSchema": {
          "properties": {
            "query": {
              "type": "string"
            }
          },
          "required": [
            "query"
          ],
          "type": "object"
        },
        "name": "search_docs"
      }
    ]
  }
}

Parameters

ParameterTypeRequiredDescription
manifestobject or arrayYesThe MCP manifest to scan: either an object (with a `tools` array, optionally `prompts`/`resources`) or a bare array of tool definitions. Each tool may have `name`, `description` and `inputSchema`.

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://mcpscan.openverbs.com/v1/scan' \
  -H 'content-type: application/json' \
  --data-raw '{"manifest":{"tools":[{"description":"Search project documentation","inputSchema":{"properties":{"query":{"type":"string"}},"required":["query"],"type":"object"},"name":"search_docs"}]}}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://mcpscan.openverbs.com/v1/scan' \
  -H 'content-type: application/json' \
  --data-raw '{"manifest":{"tools":[{"description":"Search project documentation","inputSchema":{"properties":{"query":{"type":"string"}},"required":["query"],"type":"object"},"name":"search_docs"}]}}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmcpscan.openverbs.com%2Fv1%2Fscan&method=POST
const res = await pay("https://mcpscan.openverbs.com/v1/scan", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "manifest": {
      "tools": [
        {
          "description": "Search project documentation",
          "inputSchema": {
            "properties": {
              "query": {
                "type": "string"
              }
            },
            "required": [
              "query"
            ],
            "type": "object"
          },
          "name": "search_docs"
        }
      ]
    }
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://mcpscan.openverbs.com/v1/scan",
        json={
            "manifest": {
                "tools": [
                    {
                        "description": "Search project documentation",
                        "inputSchema": {
                            "properties": {
                                "query": {
                                    "type": "string",
                                },
                            },
                            "required": [
                                "query",
                            ],
                            "type": "object",
                        },
                        "name": "search_docs",
                    },
                ],
            },
        },
    )
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
15 min agoPassed402555 ms$0.004
4 h agoPassed402587 ms$0.004
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