Sources

{
  "sources": [
    {
      "author_handle": null,
      "feed_tier": "primary",
      "is_expert": null,
      "market": {
        "marketKey": "polymarket:512345",
        "marketUrl": "https://polymarket.com/event/russia-x-ukraine-ceasefire-in-2026",
        "nativeEventId": "event-123",
        "nativeMarketId": "512345",
        "quotientMarketId": "512345",
        "seriesTicker": null,
        "slug": "russia-x-ukraine-ceasefire-in-2026",
        "sourceUrl": "https://gamma-api.polymarket.com/markets/512345",
        "venue": "polymarket"
      },
      "market_slug": "russia-x-ukraine-ceasefire-in-2026",
      "published_at": "2026-08-01T07:40:00Z",
      "relevance": {
        "confidence": "high",
        "evidence_quote": "No conditions exist for negotiations before autumn.",
        "reasoning": "Directly addresses the ceasefire negotiation timeline."
      },
      "source_name": "Reuters",
      "title": "Kremlin rules out talks before autumn",
      "type": "article",
      "url": "https://example-news.com/kremlin-talks"
    },
    {
      "author_handle": "osint_account",
      "feed_tier": "specialist",
      "is_expert": true,
      "market": {
        "marketKey": "polymarket:512345",
        "marketUrl": "https://polymarket.com/event/russia-x-ukraine-ceasefire-in-2026",
        "nativeEventId": "event-123",
        "nativeMarketId": "512345",
        "quotientMarketId": "512345",
        "seriesTicker": null,
        "slug": "russia-x-ukraine-ceasefire-in-2026",
        "sourceUrl": "https://gamma-api.polymarket.com/markets/512345",
        "venue": "polymarket"
      },
      "market_slug": "russia-x-ukraine-ceasefire-in-2026",
      "published_at": "2026-07-31T22:10:00Z",
      "relevance": {
        "confidence": "interesting",
        "evidence_quote": "Rotation activity continues on both axes.",
        "reasoning": "First-hand report on frontline posture relevant to ceasefire feasibility."
      },
      "source_name": null,
      "title": null,
      "type": "x_post",
      "url": "https://x.com/osint_account/status/1950000000000000000"
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://quotient-api-gateway.onrender.com/api/v1/sources?markets=russia-x-ukraine-ceasefire-in-2026&types=article%2Cx_post&window=48'

# 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://quotient-api-gateway.onrender.com/api/v1/sources?markets=russia-x-ukraine-ceasefire-in-2026&types=article%2Cx_post&window=48' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fquotient-api-gateway.onrender.com%2Fapi%2Fv1%2Fsources
const res = await pay("https://quotient-api-gateway.onrender.com/api/v1/sources?markets=russia-x-ukraine-ceasefire-in-2026&types=article%2Cx_post&window=48");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://quotient-api-gateway.onrender.com/api/v1/sources?markets=russia-x-ukraine-ceasefire-in-2026&types=article%2Cx_post&window=48")
    print(res.status_code, res.text)