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4SEC Cumulative Volume Delta (CVD) Crypto Market Data API
x402
4SEC Cumulative Volume Delta (CVD) Crypto Market Data API is a paid API for AI agents from api.foursec.xyz, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).
Returns real-time cumulative volume delta (CVD) and buy/sell volume data for a given crypto token symbol aggregated across multiple DEXes
Price / call$0.02
Success—
StatusDown
How this service works
Real-time multi-DEX aggregated crypto market data. Pay per request with USDC on Base via x402 protocol.
Output
A JSON object containing: the token symbol, a cumulative volume delta (CVD) value, a period CVD, buy volume, sell volume, a trading signal string (e.g. bullish/bearish), a timestamp, and the number of active WebSocket connections feeding the aggregation.
Example use cases
Real-time DEX sentiment check
“Can you pull the current CVD and trading signal for SOL — I want to know if there's more buy or sell pressure on decentralized exchanges right now?”
Algorithmic trading signal ingestion
“Fetch the latest cumulative volume delta for PEPE and tell me whether the signal is bullish or bearish based on buy versus sell volume.”
DeFi portfolio monitoring
“I want to keep an eye on ARB — can you get me the current CVD, buy volume, sell volume, and any signal coming from the multi-DEX data?”
Technical details
Endpoint
GEThttps://api.foursec.xyz/cvd/%7Bsymbol%7DWhen to prefer
Choose this endpoint when you need real-time on-chain CVD data aggregated across multiple DEXes for a specific crypto token, especially for trading signal generation, order flow analysis, or DeFi market monitoring. It is particularly useful when you need buy/sell volume pressure metrics rather than simple price data, and when pay-per-request billing via USDC on Base (x402) is acceptable.
Side effects
- Unknown or unsupported token symbol returns an error or empty result
- Payment failure via x402 protocol results in 402 Payment Required response
- Network or DEX data feed outage may cause stale or missing data
- Malformed symbol input may return a 400 Bad Request
- Rate limiting or USDC balance exhaustion blocks subsequent calls
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "object",
"example": {
"cvd": {
"type": "number"
},
"signal": {
"type": "string"
},
"symbol": {
"type": "string"
},
"timestamp": {
"type": "string",
"format": "date-time"
},
"buy_volume": {
"type": "number"
},
"period_cvd": {
"type": "number"
},
"sell_volume": {
"type": "number"
},
"active_ws_connections": {
"type": "integer"
}
}
}Tags
x402
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