# Kronos x402 API – SOL Spot Price

> Kronos x402 API – SOL Spot Price is a paid API for AI agents from kronossignals.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns a multi-source volume-weighted median spot price for Solana (SOL) in USD, aggregated from up to 4 major exchanges, paid via x402 micropayment.

## Facts

- Endpoint: GET https://kronossignals.com/api/v1/price/sol
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kronos-x402-api-sol-spot-price-29a246c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VLrUqxSsG5kq4SDyUXcLC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kronos-x402-api-sol-spot-price-29a246c0
```

Example prompt: What's the current Solana price? I want the volume-weighted median across major exchanges like Binance, Coinbase, and Kraken, with a confidence rating.

## When to prefer this

Choose this endpoint when you need a real-time, multi-source aggregated SOL/USD spot price with per-exchange transparency, volume weighting, and a confidence signal — particularly in automated agent or trading-bot contexts where paying $0.001 USDC per call via x402 is acceptable. Prefer it over single-exchange feeds when cross-exchange accuracy and outlier rejection matter.

## Known failure modes

- Payment not received or x402 micropayment fails — endpoint returns 402 Payment Required
- Asset not supported or path misconfigured — may return 404 or empty response
- Exchange data unavailable — confidence may degrade or fewer sources included
- Stale data — data_age_seconds may be elevated if upstream feeds are slow
- Rate limiting or server error — returns 5xx with no price payload

## How this service works

Paid market-intelligence API over x402

## Output

A JSON object containing: the volume-weighted median SOL/USD price, a timestamp (as_of), per-exchange breakdown (exchange name, price, volume, volume weight, included flag), a confidence label (e.g. 'high'), simple median price, cross-exchange spread percentage, data age in seconds, number of outliers rejected, and an informational disclaimer.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-07-02T10:00:00.000Z",
  "asset": "BTC-USD",
  "price": 107500,
  "sources": [
   {
    "price": 107510,
    "volume": 1200000000,
    "exchange": "binance",
    "included": true,
    "vol_weight": 0.45
   },
   {
    "price": 107490,
    "volume": 800000000,
    "exchange": "coinbase",
    "included": true,
    "vol_weight": 0.3
   },
   {
    "price": 107500,
    "volume": 400000000,
    "exchange": "kraken",
    "included": true,
    "vol_weight": 0.15
   },
   {
    "price": 107480,
    "volume": 270000000,
    "exchange": "okx",
    "included": true,
    "vol_weight": 0.1
   }
  ],
  "confidence": "high",
  "disclaimer": "Volume-weighted median price from up to 4 exchanges. Informational only, not financial advice.",
  "data_age_seconds": 0,
  "outliers_rejected": 0,
  "price_simple_median": 107480,
  "cross_exchange_spread_pct": 0.08
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kronos-x402-api-sol-spot-price-29a246c0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kronossignals.com](https://www.zero.xyz/host/kronossignals.com/llms.txt)