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OnChaiNinja MEV Protection & Detection
x402
OnChaiNinja MEV Protection & Detection is a paid API for AI agents from x402ninnin.vercel.app, paid per call via x402, $3/call, status unknown (last checked 2026-09-11).
Scans a specific on-chain transaction on a given blockchain for MEV (Maximal Extractable Value) activity and protection status
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
Returns a JSON object indicating whether MEV was detected for the specified transaction on the given chain, with a boolean mevDetected field and potentially additional details about the type or severity of MEV activity observed.
Example use cases
Example prompt
“Can you check if my transaction 0x4a7b9c2d1e8f3a56b0c9d2e7f4a1b8c3d9e6f2a5 on Base was hit by a sandwich attack or any MEV extraction?”
Technical details
Endpoint
GEThttps://x402ninnin.vercel.app/api/mev/%7Bchain%7D/%7Btx%7DWhen to prefer
Use this endpoint when you need to determine whether a specific transaction hash on Base, Solana, Arbitrum, or another supported chain was subjected to MEV extraction, sandwich attacks, or front-running. Best suited for post-trade analysis or DeFi protection workflows.
Side effects
- Invalid chain identifier returns error or empty result
- Invalid or malformed transaction hash returns error
- Transaction not found on specified chain returns not-found error
- Unsupported chain returns 400 or similar
- Network timeout for slow RPC response
- Payment failure (insufficient USDC) blocks access with 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"mevDetected": false
}
}Tags
x402
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