ToolVet
77trust / 100

Skills Research

by Grokzilla x402 Micro Pay in Search & web

x402 APIPassing, checked 1 h ago

Searches Wikipedia (opensearch + full-text), Hacker News, and DuckDuckGo when reachable, fetches the top public pages, and returns a cited answer from those pages. Uses extractive sentences, or an OpenRouter model when OPENROUTER_API_KEY is set. Returns no sources and a reason if nothing could be fetched.

POST
https://grokzilla.shop/api/skills/research
Price
$0.015
per call in USDC
Uptime
100%
last 30 days
Response time
316 ms
544 ms slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

POST https://grokzilla.shop/api/skills/research

Each call costs $0.015 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://grokzilla.shop/api/skills/research
content-type: application/json

{
  "query": "What is x402?"
}

Parameters

ParameterTypeRequiredDescription
querystringYes

Example response

The provider's example. We can't check it without paying.

{
  "answer": "x402 is built-in to existing HTTP requests, with no additional communication required. [1]\nx402 enables agents to monetize their own services, pay other agents, or handle micropayments automatically on behalf of users. [2]",
  "fetched_at": "2026-10-05T06:00:00Z",
  "key_points": [
    "x402 is built-in to existing HTTP requests, with no additional communication required. [1]",
    "x402 enables agents to monetize their own services, pay other agents, or handle micropayments automatically on behalf of users. [2]"
  ],
  "method": "extractive",
  "query": "What is x402?",
  "skill": "research",
  "sources": [
    {
      "n": 1,
      "snippet": "An open protocol for internet-native payments.",
      "title": "x402",
      "url": "https://x402.org/"
    },
    {
      "n": 2,
      "snippet": "Agents can pay each other with stablecoins over the x402 open protocol.",
      "title": "Google Agentic Payments Protocol + x402",
      "url": "https://www.coinbase.com/developer-platform/discover/launches/google_x402"
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.015.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://grokzilla.shop/api/skills/research' \
  -H 'content-type: application/json' \
  --data-raw '{"query":"What is x402?"}'

# 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://grokzilla.shop/api/skills/research' \
  -H 'content-type: application/json' \
  --data-raw '{"query":"What is x402?"}' \
  | 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 $0.015 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.015" });
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 $0.015 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgrokzilla.shop%2Fapi%2Fskills%2Fresearch&method=POST
const res = await pay("https://grokzilla.shop/api/skills/research", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "query": "What is x402?"
  }),
});
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 $0.015 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.015"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://grokzilla.shop/api/skills/research",
        json={
            "query": "What is x402?",
        },
    )
    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
1 h agoPassed402382 ms$0.015
6 h agoPassed402372 ms$0.015
10 h agoPassed402340 ms$0.015
14 h agoPassed402294 ms$0.015
18 h agoPassed402316 ms$0.015
Show 10 older checks
23 h agoPassed402376 ms$0.015
27 h agoPassed402169 ms$0.015
31 h agoPassed402364 ms$0.015
35 h agoPassed402309 ms$0.015
39 h agoPassed402246 ms$0.015
43 h agoPassed402442 ms$0.015
46 h agoPassed402351 ms$0.015
2 days agoPassed402349 ms$0.015
2 days agoPassed402162 ms$0.015
2 days agoPassed402347 ms$0.015