Kronos

Pay-per-call BTC/ETH/SOL forecasts & crypto derivatives signals for autonomous agents, via x402.

No API keys. No subscriptions. AI agents pay $0.001 USDC per call via the x402 HTTP micropayment protocol (Base Sepolia testnet — mainnet soon). Moat: a verifiable, auto-scored track record visible at /api/stats.

Disclaimer: Informational only. Not financial advice. Forecasts are probabilistic model outputs, not guarantees. Past accuracy does not predict future results. Use at your own risk.

Endpoints

Method	Path	Price	Returns
GET	/api/v1/forecast/btc	$0.001 USDC	BTC-USD directional signal: EMA/RSI/MACD/ATR composite, up_prob (0–1), price range estimate, confidence score. Multi-asset forecasts (ETH, SOL) via `?asset=` coming soon.
GET	/api/v1/signals/btc	$0.001 USDC	BTC derivatives intelligence: funding rate, open interest, basis, OI change (1h), funding trend signal. Source: Bybit.

Forecast parameter: ?horizon=1h | 4h | 24h (default: 1h). Network: eip155:84532 (Base Sepolia testnet). Auth: x402 X-PAYMENT header (EIP-3009).

How to Pay (x402)

Kronos uses the x402 protocol: the server returns HTTP 402 with a signed payment requirement; the client attaches a USDC EIP-3009 authorization as an X-PAYMENT header and replays the request. The x402 facilitator submits on-chain and covers gas. No wallet pop-ups, no subscriptions.

import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";

// Set BUYER_PRIVATE_KEY in your environment — never commit a real key
const account = privateKeyToAccount(
  process.env.BUYER_PRIVATE_KEY as `0x${string}`
);

const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{
    network: "eip155:84532",   // Base Sepolia testnet
    client: new ExactEvmScheme(account),
  }],
});

// $0.001 USDC paid automatically — gasless EIP-3009 flow
const res = await fetchWithPayment(
  "https://kronossignals.com/api/v1/forecast/btc?horizon=1h",
  { method: "GET" }
);
const forecast = await res.json();
console.log(forecast.forecast.up_prob);   // e.g. 0.67
console.log(forecast.indicators.rsi14);   // e.g. 58.2

Install: npm i @x402/fetch @x402/evm viem. Set BUYER_PRIVATE_KEYin your environment — never commit a real key. Facilitator: x402.org/facilitator.

Track Record & Trust

Kronos maintains a verifiable, auto-scored accuracy log. Every forecast is scored against the actual price at the predicted horizon. Results are public, continuously updated, and machine-readable.

/api/statsLive accuracy: hit rate, in-range rate, total calls, total earnings
/.well-known/x402x402 discovery manifest — payable endpoints + schemas (machine-readable)
/api/openapi.jsonOpenAPI 3.0 spec (machine-readable)
/api/healthHealth check (no payment required)

About

Kronos is a machine-payable market-intelligence API built for autonomous agents. The forecast endpoint fetches live OHLCV data and runs the Kronos ML model, producing a composite signal from six indicator votes: price-vs-EMA20, price-vs-EMA50, EMA20/EMA50 crossover, RSI(14) momentum, MACD(12,26,9) line sign, and MACD histogram sign. The derivatives endpoint provides real-time funding rate, open interest, basis, and trend signals sourced from Bybit. Currently on Base Sepolia testnet; mainnet (Base) launch imminent.