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Synapse ETH Price API
x402
Synapse ETH Price API is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Returns the current USD price of Ethereum (ETH) via a pay-per-call x402 endpoint requiring no API key
Price / call$0.001
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
A JSON object containing the coin identifier ('ethereum') and its current price in USD as a numeric value, e.g. {"coin": "ethereum", "price_usd": 3000}.
Example use cases
Crypto portfolio valuation refresh
“Check the current ETH price in USD so I can update the value of my Ethereum holdings right now.”
Trading bot price trigger check
“Fetch the live Ethereum price — I want to know if ETH has crossed $3500 so my bot can decide whether to execute a trade.”
DeFi dashboard price display
“Pull the current ETH/USD price for my DeFi dashboard — I need a fresh number to show users what their collateral is worth.”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/eth-price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, keyless, pay-per-call ETH price lookup with no account setup. It is ideal for agents operating on Base that already handle x402 micropayments, and for use cases where per-call billing at $0.001 USDC is preferred over a subscription API key model.
Side effects
- Payment not included or insufficient USDC — returns HTTP 402 Payment Required
- Network or upstream data source unavailable — may return 5xx error
- Stale price data if upstream oracle is lagging
- Invalid or malformed x402 payment header causes rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"coin": "ethereum",
"price_usd": 3000
}
}Tags
x402
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