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Liminal Spot Prices
x402
Liminal Spot Prices is a paid API for AI agents from x402-spot-prices.hsharmanov02.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Returns live cryptocurrency spot prices in USD and fiat FX rates, fetched from CoinGecko, via a pay-per-request x402 micropayment model
Price / call$0.01
Success—
StatusUnknown
How this service works
Live crypto spot-price snapshots (USD) and fiat FX spot rates. Pay-per-request via x402 v2: $0.01 USDC on Base, Monad, Arbitrum, Optimism, Polygon, Avalanche or Solana (eip155:8453), Monad (eip155:143), Arbitrum (eip155:42161), Optimism (eip155:10), Polygon (eip155:137), Avalanche (eip155:43114) or Solana, scheme exact (EIP-3009). Unpaid calls return HTTP 402 with a base64 PAYMENT-REQUIRED header; retry with a PAYMENT-SIGNATURE header.
Output
A JSON object containing a Unix timestamp (as_of), a prices map keyed by coin name with USD spot price and 24-hour percentage change, the data source (CoinGecko), service name, and the vs_currency used (usd).
Example use cases
Live crypto portfolio valuation
“Can you pull the current spot prices for bitcoin and ethereum so I can see what my crypto holdings are worth right now?”
Price alert threshold check
“Check the live price of bitcoin — I want to know if it's above or below $110,000 and what the 24-hour change looks like.”
Arbitrage price reference
“Grab the current USD spot price for ethereum including the 24-hour change so I can compare it against another exchange's feed.”
Technical details
Endpoint
GEThttps://x402-spot-prices.hsharmanov02.workers.dev/price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-request crypto spot price snapshot without a subscription or API key, especially in agentic workflows that support x402 micropayments. It's ideal for one-off price checks, portfolio valuation steps, or trigger evaluations where you want to avoid monthly API key commitments. Prefer alternatives with free tiers if you need very high-frequency polling or bulk historical data.
Side effects
- HTTP 402 with base64 PAYMENT-REQUIRED header if no payment signature is provided — must retry with valid PAYMENT-SIGNATURE header
- Invalid or unsupported coin/currency query returns empty or error response
- Stale snapshot if CoinGecko upstream is delayed
- Network timeout from Cloudflare Worker edge if upstream is unavailable
- Payment rejected if USDC balance is insufficient or wrong chain is used
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json",
"example": {
"as_of": 1759099200,
"prices": {
"bitcoin": {
"usd": 114230.5,
"usd_24h_change": 1.24
},
"ethereum": {
"usd": 4281.1,
"usd_24h_change": -0.63
}
},
"source": "coingecko",
"service": "spot-price",
"vs_currency": "usd"
}
}Tags
x402
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