Pulse Catalysts

{
  "data": {
    "catalysts": [
      {
        "catalystScore": 84.2,
        "freshnessMinutes": 4.5,
        "id": "pulse:headline_1",
        "impact": {
          "confidence": 0.88,
          "hoursToClose": 61.5,
          "liquidity": 390000,
          "marketSlug": "will-btc-close-above-110k-this-week",
          "matchedTokens": [
            "BTC",
            "bitcoin"
          ],
          "probabilityMidpoint": 0.48,
          "question": "Will BTC close above $110k this week?",
          "score": 0.92,
          "source": "polymarket",
          "spread": 0.02,
          "urgency": "soon",
          "url": "https://polymarket.com/event/will-btc-close-above-110k-this-week",
          "volume24h": 1200000,
          "yesAsk": 0.49,
          "yesBid": 0.47
        },
        "news": {
          "headline": "Bitcoin volatility rises ahead of CPI print",
          "id": "headline_1",
          "provider": "coindesk",
          "publishedAt": "2026-03-25T11:58:00.000Z",
          "status": "fresh",
          "summary": "Macro-sensitive crypto headlines from cached pulse sources.",
          "tags": [
            "news",
            "crypto"
          ],
          "tickers": [
            "BTC"
          ]
        },
        "reasons": [
          "matchedTokens=BTC,bitcoin",
          "linkConfidence=0.88",
          "urgency=soon"
        ]
      }
    ],
    "criteria": {
      "limit": 3,
      "minConfidence": null,
      "source": null,
      "tickers": []
    },
    "returned": 1,
    "totalLinkedItems": 10
  },
  "meta": {
    "freshnessMs": 30000,
    "generatedAt": "2026-03-25T12:00:00.000Z",
    "requestId": "req_example_123",
    "updatedAt": "2026-03-25T11:59:30.000Z"
  },
  "product": {
    "accepts": [
      {
        "network": "eip155:8453",
        "payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
        "price": "$0.1000",
        "scheme": "exact"
      },
      {
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
        "price": "$0.1000",
        "scheme": "exact"
      }
    ],
    "id": "pulse-catalysts",
    "method": "GET",
    "name": "Prediction Market Catalyst Signals",
    "networks": [
      "eip155:8453",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
    ],
    "path": "/v1/pulse/catalysts",
    "price": "$0.1000"
  },
  "service": "seerium-x402-api"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.seerium.xyz/v1/pulse/catalysts?limit=3'

# 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.seerium.xyz/v1/pulse/catalysts?limit=3' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.seerium.xyz%2Fv1%2Fpulse%2Fcatalysts
const res = await pay("https://api.seerium.xyz/v1/pulse/catalysts?limit=3");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
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.seerium.xyz/v1/pulse/catalysts?limit=3")
    print(res.status_code, res.text)