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Klymax402 Whale Alert — Large On-Chain Transaction Monitor
x402
Klymax402 Whale Alert — Large On-Chain Transaction Monitor is a paid API for AI agents from klymax402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).
Fetches large on-chain transactions (whale movements) on Ethereum or Base blockchain above a configurable ETH value threshold
Price / call$0.008
Success—
StatusUnknown
How this service works
One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.
Output
Returns a JSON object with: the chain scanned, a timestamp, total whale transaction count, the latest block number, the ETH minimum threshold applied, number of blocks scanned, and an array of individual large transactions meeting the criteria.
Example use cases
Spot whale activity before market moves
“Are there any unusually large Ethereum transactions happening right now? Show me anything above 1000 ETH in the latest blocks so I can watch for potential market impact.”
Monitor Base chain for large DeFi flows
“Scan the Base blockchain for whale transactions above 200 ETH and tell me how many there are and what blocks were checked.”
Track minimum-threshold whale movements
“Pull the recent large transfers on Ethereum with the default 100 ETH minimum — I just want to see the raw whale count and the transactions list from the latest scan.”
Technical details
Endpoint
GEThttps://klymax402.com/api/whale-alert/api/whalesWhen to prefer
Use this endpoint when you need near-real-time on-chain data about large ETH transfers on Ethereum or Base without managing your own blockchain node or subscribing to a dedicated whale-tracking service. It is a good fit for lightweight market intelligence, DeFi flow monitoring, or triggering downstream logic when whale activity is detected. If you need historical data, multi-chain coverage beyond Ethereum/Base, or real-time streaming alerts, a dedicated whale analytics platform may be more appropriate.
Side effects
- Invalid chain value (not 'ethereum' or 'base') may return an error or default behavior
- minValue set too high may return empty transactions array with whaleCount of 0
- Payment failure (insufficient USDC or bad x402 header) results in 402 response
- Network timeouts if the blockchain node is slow or overloaded
- Empty result set during low-activity periods on Base chain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Blockchain: 'ethereum' or 'base' (default: ethereum) |
| minValue | number | Minimum transaction value in ETH (default: 100) |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "example",
"timestamp": "example",
"whaleCount": 1,
"latestBlock": 1,
"minValueEth": 1,
"transactions": [],
"blocksScanned": 1
}
}Tags
x402
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