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Plainchain Price Feed – Spot Prices for Crypto Symbols
x402
Plainchain Price Feed – Spot Prices for Crypto Symbols is a paid API for AI agents from plainchain.appin60.com, paid per call via x402, $0.001042/call, status unknown (last checked 2026-10-14).
Returns current USD spot prices for one or more cryptocurrency symbols (e.g. ETH, BTC, SOL) sourced from Coinbase, paid per-call via x402 USDC on Base.
Price / call$0.001042
Success—
StatusUnknown
How this service works
Gas, balances, token data, address type, approvals, transaction decoding, x402 receipt verification and verifiable randomness on Base, Arbitrum, Ethereum and Optimism. No API key: pay $0.001-$0.01 per call in USDC on Base via x402.
Output
A JSON object containing a timestamp (ISO 8601), a map of requested symbols to their current USD spot prices (e.g. {"ETH": 2527.22, "BTC": 111845.5}), the data source ('Coinbase spot'), and the currency ('USD').
Example use cases
Portfolio valuation in real time
“I need to know the current USD prices for ETH, BTC, and SOL so I can calculate the total value of my crypto portfolio — can you grab the latest spot prices for all three?”
DeFi trade decision trigger
“Before I swap, can you check the current spot price of ETH and BTC so I can figure out whether the ratio is favorable for a trade right now?”
Price alert baseline snapshot
“Set up a baseline for me — grab the current Coinbase spot prices for ETH and SOL so I can compare them later and see how much they've moved.”
Technical details
Endpoint
GEThttps://plainchain.appin60.com/v1/price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time USD spot prices for major cryptocurrencies (ETH, BTC, SOL, etc.) sourced from Coinbase, without an API key, paying only per call in USDC via x402 on Base. It is ideal for AI agents that need lightweight, pay-as-you-go price lookups without committing to a subscription or managing API credentials.
Side effects
- Missing or invalid 'symbols' query parameter returns an error
- Unrecognized ticker symbol may return null or omit that symbol from results
- Payment failure via x402 (insufficient USDC balance) results in 402 Payment Required
- Network or upstream Coinbase data unavailability may cause 503 or stale data
- Malformed symbol list (wrong delimiter) may return partial or empty results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"at": "2026-10-13T08:40:00.000Z",
"prices": {
"BTC": 111845.5,
"ETH": 2527.22
},
"source": "Coinbase spot",
"currency": "USD"
}
}Tags
x402
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