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OnChaiNinja MEV Detection
x402
OnChaiNinja MEV Detection is a paid API for AI agents from x402ninja.vercel.app, paid per call via x402, $3/call, status unknown (last checked 2026-09-12).
Detects MEV (Maximal Extractable Value) activity and protection status for a specific transaction on a given blockchain chain
Price / call$3
Success—
StatusUnknown
How this service works
Alpha signals, whale tracking, rug scanning, and MEV protection across Base, Solana, Arbitrum, and more.
Output
A JSON object with a mevDetected boolean flag indicating whether MEV activity was identified for the given transaction, potentially including details about the type of MEV exploit detected.
Example use cases
Example prompt
“Check if transaction 0x4f3a8b2c...d91e on Base was targeted by MEV bots or sandwich attacks.”
Technical details
Endpoint
GEThttps://x402ninja.vercel.app/api/mev/%7Bchain%7D/%7Btx%7DWhen to prefer
Use this endpoint when you need to verify whether a specific transaction on Base, Solana, or Arbitrum was subjected to MEV exploitation such as sandwich attacks or front-running, especially before or after executing high-value DeFi trades.
Side effects
- Invalid chain identifier returns error or empty response
- Malformed or non-existent transaction hash returns error
- Unsupported chain returns not-found or error response
- Payment failure ($3 USDC required) returns 402 Payment Required
- Transaction too recent may not yet be indexed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"mevDetected": false
}
}Tags
x402
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