Markets Mispriced

{
  "count": 1,
  "markets": [
    {
      "bluf": "Persistent inflation data makes a June cut unlikely.",
      "clarifications": "Rate cut markets resolve based on the upper bound of the target range.",
      "end_date": "2026-06-30T00:00:00Z",
      "inDispute": false,
      "last_updated": "2026-03-05T14:30:00Z",
      "marketKey": "polymarket:123456",
      "marketUrl": "https://polymarket.com/event/fed-rate-cut-june-2026",
      "market_odds": 0.46,
      "nativeEventId": "98765",
      "nativeMarketId": "123456",
      "polymarketUrl": "https://polymarket.com/event/fed-rate-cut-june-2026",
      "question": "Will the Fed cut rates by June 2026?",
      "quotientMarketId": "123456",
      "quotientUrl": "https://quotient.social/markets/123456",
      "quotient_odds": 0.34,
      "seriesTicker": null,
      "signal_count": 5,
      "slug": "fed-rate-cut-june-2026",
      "sourceUrl": "https://gamma-api.polymarket.com/markets/123456",
      "spread": 0.12,
      "spread_direction": "q_lower",
      "venue": "polymarket",
      "venue_quote": {
        "freshness": "verified",
        "market_id": "123456",
        "observed_at": "2026-08-31T12:00:00Z",
        "quote_method": "midpoint",
        "schema_version": "1",
        "selected_probability": 0.46,
        "venue": "polymarket",
        "venue_timestamp": "2026-08-31T12:00:00Z",
        "yes_ask": 0.46,
        "yes_bid": 0.46,
        "yes_last": null
      },
      "volume_24h": 182400
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://quotient-api-gateway.onrender.com/api/v1/markets/mispriced?max_forecast_age=48&min_spread=0.08&sort=spread_desc'

# 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/markets/mispriced?max_forecast_age=48&min_spread=0.08&sort=spread_desc' \
  | 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 $0.02 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%2Fquotient-api-gateway.onrender.com%2Fapi%2Fv1%2Fmarkets%2Fmispriced
const res = await pay("https://quotient-api-gateway.onrender.com/api/v1/markets/mispriced?max_forecast_age=48&min_spread=0.08&sort=spread_desc");
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 $0.02 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.get("https://quotient-api-gateway.onrender.com/api/v1/markets/mispriced?max_forecast_age=48&min_spread=0.08&sort=spread_desc")
    print(res.status_code, res.text)