Prediction Market

{
  "price_usd": 0.05,
  "provenance": {
    "attempts": 1,
    "elapsed_ms": 660,
    "providers_used": [
      "polymarket-gamma"
    ],
    "steps": [
      {
        "ms": 640,
        "ok": true,
        "provider": "polymarket-gamma",
        "step": "market"
      }
    ]
  },
  "receipt_id": "rcpt_9f1c2b3a4d5e6f70",
  "receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70",
  "result": {
    "market": {
      "active": true,
      "closed": false,
      "end_date": "2026-12-31T00:00:00Z",
      "id": "512345",
      "implied_probabilities": [
        {
          "outcome": "Yes",
          "probability_pct": 62.5
        },
        {
          "outcome": "No",
          "probability_pct": 37.5
        }
      ],
      "liquidity": 240310.2,
      "question": "Will BTC close above $100k on Dec 31?",
      "slug": "will-btc-close-above-100k",
      "volume": 1834520.5
    },
    "slug": "will-btc-close-above-100k",
    "source": "polymarket-gamma"
  },
  "status": "ok",
  "worker": "prediction.market"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://hubvibe-io.com/work/prediction/market' \
  -H 'content-type: application/json' \
  --data-raw '{"slug":"will-lebron-james-win-the-2028-us-presidential-election"}'

# 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://hubvibe-io.com/work/prediction/market' \
  -H 'content-type: application/json' \
  --data-raw '{"slug":"will-lebron-james-win-the-2028-us-presidential-election"}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhubvibe-io.com%2Fwork%2Fprediction%2Fmarket&method=POST
const res = await pay("https://hubvibe-io.com/work/prediction/market", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "slug": "will-lebron-james-win-the-2028-us-presidential-election"
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://hubvibe-io.com/work/prediction/market",
        json={
            "slug": "will-lebron-james-win-the-2028-us-presidential-election",
        },
    )
    print(res.status_code, res.text)