ToolVet
13trust / 100

Chaos

by x402-testbed in Other

x402 APIFailing, checked 1 h ago

x402 test endpoint (GET) — failure injection with query params only. Query param failRate (0-1): the request fails with 500 BEFORE payment is taken, so you can test that your x402 client never treats a 5xx as paid and retries without double-paying.

GET
https://health-api.tail11a58f.ts.net/chaos
Price
$0.001
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 1 h ago: Connection failed (UND_ERR_CONNECT_TIMEOUT)

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

How to call it

GET https://health-api.tail11a58f.ts.net/chaos

Each call costs $0.001 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.

GET https://health-api.tail11a58f.ts.net/chaos?failRate=0.5

Parameters

ParameterTypeRequiredDescription
failRatenumberNoProbability (0-1) of injected failure

Example response

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

{
  "failRate": 0,
  "roll": 0.919,
  "survived": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://health-api.tail11a58f.ts.net/chaos?failRate=0.5'

# 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 - 'https://health-api.tail11a58f.ts.net/chaos?failRate=0.5' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhealth-api.tail11a58f.ts.net%2Fchaos
const res = await pay("https://health-api.tail11a58f.ts.net/chaos?failRate=0.5");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://health-api.tail11a58f.ts.net/chaos?failRate=0.5")
    print(res.status_code, res.text)

Security scan

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