ToolVet
80trust / 100

Skill Api Investigation

by Skill: API investigation in Search & web

x402 APIPassing, checked 5 h ago

Point at an unknown API endpoint and figure out how to use it: auth scheme, content type, version, rate limits, OpenAPI/Swagger spec discovery, and JSON response structure. The deterministic recon workflow before writing a single line of integration code. API investigation skill pack: one x402 payment runs 7 underlying tools (url-parse, http-check, http-headers, extract, html-links, json-format, json-query); partial-success per step.

POST
https://agent402.tools/api/skill/api-investigation
Price
$0.017
per call in USDC
Uptime
93.8%
last 30 days
Response time
280 ms
543 ms slowest 5%
Last check
Passed
5 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://agent402.tools/api/skill/api-investigation

Each call costs $0.017 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://agent402.tools/api/skill/api-investigation
content-type: application/json

{
  "endpoint": "https://agent402.tools/api/pricing"
}

Parameters

ParameterTypeRequiredDescription
endpointstringYesAPI URL to investigate (e.g. https://api.example.com/v1/users)

Example response

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

Example response, 44 lines
{
  "args": {
    "endpoint": "https://agent402.tools/api/pricing"
  },
  "pack": "api-investigation",
  "steps": [
    {
      "ok": true,
      "result": {},
      "slug": "url-parse"
    },
    {
      "ok": true,
      "result": {},
      "slug": "http-check"
    },
    {
      "ok": true,
      "result": {},
      "slug": "http-headers"
    },
    {
      "ok": true,
      "result": {},
      "slug": "extract"
    },
    {
      "ok": true,
      "result": {},
      "slug": "html-links"
    },
    {
      "ok": true,
      "result": {},
      "slug": "json-format"
    },
    {
      "ok": true,
      "result": {},
      "slug": "json-query"
    }
  ],
  "summary": "7/7 steps succeeded"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.017.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent402.tools/api/skill/api-investigation' \
  -H 'content-type: application/json' \
  --data-raw '{"endpoint":"https://agent402.tools/api/pricing"}'

# 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://agent402.tools/api/skill/api-investigation' \
  -H 'content-type: application/json' \
  --data-raw '{"endpoint":"https://agent402.tools/api/pricing"}' \
  | 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 $0.017 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.017" });
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 $0.017 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fskill%2Fapi-investigation&method=POST
const res = await pay("https://agent402.tools/api/skill/api-investigation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "endpoint": "https://agent402.tools/api/pricing"
  }),
});
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 $0.017 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.017"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agent402.tools/api/skill/api-investigation",
        json={
            "endpoint": "https://agent402.tools/api/pricing",
        },
    )
    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
5 h agoPassed402290 ms$0.017
9 h agoPassed402338 ms$0.017
14 h agoPassed402331 ms$0.017
18 h agoPassed402186 ms$0.017
23 h agoPassed402297 ms$0.017
Show 10 older checks
27 h agoPassed402201 ms$0.017
31 h agoPassed402322 ms$0.017
35 h agoPassed402203 ms$0.017
39 h agoPassed402349 ms$0.017
44 h agoPassed402442 ms$0.017
2 days agoPassed402280 ms$0.017
2 days agoPassed402328 ms$0.017
2 days agoPassed402320 ms$0.017
3 days agoPassed402194 ms$0.017
3 days agoPassed402325 ms$0.017