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Synapse Reference Prices
x402
Synapse Reference Prices is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Fetches current reference prices (price in USD and 24h change) for a given crypto or equity symbol via x402 pay-per-call
Price / call$0.002
Success—
StatusUnknown
How this service works
Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.
Output
Returns a JSON object with the asset symbol, its current price in USD, and its 24-hour percentage price change (e.g. {symbol: 'bitcoin', price_usd: 65000, change_24h_pct: 1.2}).
Example use cases
Real-time crypto price check
“What is the current USD price of ethereum and how much has it moved in the last 24 hours?”
Portfolio valuation snapshot
“I need the current reference prices for bitcoin and solana so I can calculate my portfolio value — can you pull those for me?”
Trading alert threshold check
“Check the current price of bitcoin and tell me the 24-hour percentage change so I can see if it crossed my 5% threshold.”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/reference-prices?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, keyless, pay-per-call reference price for a crypto or equity asset without signing up for a data provider account. Ideal for agents that need spot prices on-demand with micropayment billing on Base.
Side effects
- Unknown or unsupported symbol returns an error or empty response
- Payment failure via x402 if USDC balance is insufficient
- Network timeout if the underlying price data source is unavailable
- Stale data if upstream market feeds are delayed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"symbol": "bitcoin",
"price_usd": 65000,
"change_24h_pct": 1.2
}
}Tags
x402
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