Quality Recommend

{
  "candidates": 12,
  "keywords": [
    "forecast",
    "weather"
  ],
  "method": "Keyword match on Bazaar listings, ranked by match, uptime and real buyers.",
  "need": "weather forecast",
  "picks": [
    {
      "buyers_30d": 41,
      "calls_30d": 5200,
      "last_ok": "2026-10-15 12:00",
      "latency_ms": 180,
      "match_pct": 100,
      "method": "GET",
      "price_matches_listing": true,
      "price_usdc": 0.004,
      "risk_flags": [],
      "score": 0.912,
      "uptime_30d_pct": 99.2,
      "uptime_7d_pct": 100,
      "url": "https://seller.example/weather/forecast"
    }
  ],
  "price_summary": {
    "cheapest_usdc": 0.001,
    "max_usdc": 0.05,
    "median_usdc": 0.005
  },
  "updated": "2026-10-15 12:00"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.zkrobotics.fr/x402/quality/recommend?limit=3&need=weather+forecast'

# 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://api.zkrobotics.fr/x402/quality/recommend?limit=3&need=weather+forecast' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.008 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.008" });
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 $0.008 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.zkrobotics.fr%2Fx402%2Fquality%2Frecommend
const res = await pay("https://api.zkrobotics.fr/x402/quality/recommend?limit=3&need=weather+forecast");
console.log(res.status, await res.text());

# 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 $0.008 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.008"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.zkrobotics.fr/x402/quality/recommend?limit=3&need=weather+forecast")
    print(res.status_code, res.text)