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Obol Order Book Top
x402
Obol Order Book Top is a paid API for AI agents from obol.danieldutoit.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).
Returns the top-of-book (best bid and best ask) snapshot from a cryptocurrency exchange order book for a given trading pair.
Price / call$0.001
Success—
StatusUnknown
How this service works
Obol sells verified blockchain data over x402, settled in USDC on Base.
Output
A JSON object containing the best bid (price and volume) and best ask (price and volume) for the requested trading pair, along with the spread as a percentage, the exchange name, the base and quote currencies, the observed timestamp, a match type describing coverage quality, and a disclaimer noting the data is historical and informational.
Example use cases
Real-time spread monitoring for arbitrage
“Check the best bid and ask for BTC/USD on Coinbase right now and tell me what the spread is — I want to see if there's an arb opportunity.”
Historical order book research
“What was the top of book for BTC/USD on Coinbase at timestamp 1786579500? I need the best bid, best ask, and spread for that exact moment.”
Pre-trade price sanity check
“Before I execute a trade, can you pull the current best ask for ETH/USD on Coinbase so I know what price I should expect to pay?”
Technical details
Endpoint
GEThttps://obol.danieldutoit.net/v1/markets/orderbook-top?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need verified, structured order book top-of-book data (best bid/ask + spread) for major crypto pairs from a specific exchange, especially when you require a micropayment-native API settled in USDC on Base via x402 without API key management. Prefer this over free, unverified market data sources when data provenance and payment-per-call economics matter.
Side effects
- Trading pair not found on the requested exchange returns found: false
- Invalid or unsupported exchange name results in no data
- Timestamp out of available historical range returns no snapshot
- Network or payment failure via x402 protocol returns a payment-required error
- Malformed query parameters cause a 4xx response
Output
Schema · Response
{
"type": "json",
"example": {
"base": "BTC",
"found": true,
"quote": "USD",
"coverage": {
"match_type": "exact_exchange_timestamp_base_and_quote",
"maximum_results": 1
},
"exchange": "COINBASE",
"snapshot": {
"best_ask": {
"price": 63402.2,
"volume": 0.054
},
"best_bid": {
"price": 63402.1,
"volume": 0.364
},
"observed_at": "2026-08-13T00:05:00.000Z",
"spread_percent": 0.0001577234823429269
},
"timestamp": "1786579500",
"disclaimer": "Historical exchange observation for informational use; not investment advice."
}
}Tags
x402
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