ToolVet
74trust / 100

Kb Ask

by XH Agents Knowledge Base in Developer tools

x402 APIPassing, checked 2 h ago

Ask the XH Agents knowledge base (15 field notes on infrastructure, x402 and agent tooling)

POST
https://xhagents.xyz/api/kb/ask
Price
$0.03
per call in USDC
Uptime
100%
last 30 days
Response time
872 ms
1.3 s slowest 5%
Last check
Passed
2 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 · Watch with other listings

How to call it

POST https://xhagents.xyz/api/kb/ask

Each call costs $0.03 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://xhagents.xyz/api/kb/ask
content-type: application/json

{
  "question": "nginx docroot mismatch after a build"
}

Parameters

ParameterTypeRequiredDescription
questionstringYes

Example response

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

{
  "best_match": {
    "id": "nginx-docroot-vs-source",
    "solution": "Check which directory the server really serves (nginx -T plus the served file's mtime), then define one deployment step."
  },
  "matches": [
    {
      "category": "devops-vps",
      "id": "nginx-docroot-vs-source",
      "title": "The site you are editing is not always the site you are serving"
    }
  ],
  "question": "nginx docroot mismatch after a build"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.03.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://xhagents.xyz/api/kb/ask' \
  -H 'content-type: application/json' \
  --data-raw '{"question":"nginx docroot mismatch after a build"}'

# 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://xhagents.xyz/api/kb/ask' \
  -H 'content-type: application/json' \
  --data-raw '{"question":"nginx docroot mismatch after a build"}' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fxhagents.xyz%2Fapi%2Fkb%2Fask&method=POST
const res = await pay("https://xhagents.xyz/api/kb/ask", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "question": "nginx docroot mismatch after a build"
  }),
});
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://xhagents.xyz/api/kb/ask",
        json={
            "question": "nginx docroot mismatch after a build",
        },
    )
    print(res.status_code, res.text)

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