ToolVet
78trust / 100

Scale

by fractal-scaling-api.onrender.com in Other

x402 APIPassing, checked 2 h ago

Fractal scale operation - 0.02 USDC per successful request

POST
https://fractal-scaling-api.onrender.com/scale
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
260 ms
675 ms 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://fractal-scaling-api.onrender.com/scale

Each call costs $0.02 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://fractal-scaling-api.onrender.com/scale
content-type: application/json

{
  "points": [
    [
      0,
      0
    ],
    [
      1,
      0
    ],
    [
      0.5,
      0.866
    ],
    [
      0.5,
      0.289
    ]
  ],
  "value": 0.5
}

Example response

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

{
  "selected_indices": [
    3,
    0
  ],
  "stats": {
    "max_coverage_distance": 0.578,
    "mean_coverage_distance": 0.289,
    "reuse_from_previous": 1,
    "scale": 0.5,
    "selected": 2,
    "total": 4,
    "weighted_mean_coverage_distance": 0.289
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://fractal-scaling-api.onrender.com/scale' \
  -H 'content-type: application/json' \
  --data-raw '{"points":[[0,0],[1,0],[0.5,0.866],[0.5,0.289]],"value":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 - -X POST 'https://fractal-scaling-api.onrender.com/scale' \
  -H 'content-type: application/json' \
  --data-raw '{"points":[[0,0],[1,0],[0.5,0.866],[0.5,0.289]],"value":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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffractal-scaling-api.onrender.com%2Fscale&method=POST
const res = await pay("https://fractal-scaling-api.onrender.com/scale", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "points": [
      [
        0,
        0
      ],
      [
        1,
        0
      ],
      [
        0.5,
        0.866
      ],
      [
        0.5,
        0.289
      ]
    ],
    "value": 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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://fractal-scaling-api.onrender.com/scale",
        json={
            "points": [
                [
                    0,
                    0,
                ],
                [
                    1,
                    0,
                ],
                [
                    0.5,
                    0.866,
                ],
                [
                    0.5,
                    0.289,
                ],
            ],
            "value": 0.5,
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402243 ms$0.02
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10 h agoPassed402239 ms$0.02
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Show 10 older checks
21 h agoPassed402239 ms$0.02
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