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MEV History Sandwich Check API
x402
MEV History Sandwich Check API is a paid API for AI agents from mev-history-mcp.mtree.workers.dev, paid per call via x402, $0.050000/call, status unknown (last checked 2026-09-14).
Checks whether a specific Ethereum transaction was sandwiched or exposed to MEV (Maximal Extractable Value) attack, returning structured JSON evidence with provenance.
Price / call$0.050000
Success—
StatusUnknown
How this service works
Paid mev history mcp route for autonomous agents. Returns JSON with provenance, route-specific evidence, and machine-readable fields. Buyer-intent match: sandwich check API, transaction MEV risk. Price 0.05 USDC on Base via x402. Demo/preview: https://mev-history-mcp.mtree.workers.dev/demo/sandwich_check. Contact: https://mev-history-mcp.mtree.workers.dev/contact.
Output
Returns a JSON object with MEV sandwich detection result, route-specific evidence, provenance metadata, and machine-readable fields indicating whether the transaction was sandwiched, front-run, or back-run by MEV bots.
Example use cases
Example prompt
“Can you check if transaction 0xabc123...def456 was sandwiched or hit by any MEV attack? I want to see the evidence and risk assessment.”
Technical details
Endpoint
POSThttps://mev-history-mcp.mtree.workers.dev/v1/tx/sandwich_checkWhen to prefer
Use this endpoint when you need to determine whether a specific on-chain transaction was subjected to a sandwich attack or other MEV exploitation, especially when you need structured, machine-readable evidence with provenance for autonomous agent workflows. Prefer this over generic block explorers when you need a deterministic yes/no MEV verdict with supporting data.
Side effects
- Transaction hash not found or invalid — returns error with no MEV data
- Transaction too recent to have indexed MEV history — may return empty or pending result
- Network/chain not supported — error indicating unsupported chain
- Payment not completed via x402 — 402 Payment Required response
- Rate limit exceeded — HTTP 429 response
- Malformed POST body — 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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