Mev History

x402 MCP for EVM MEV history. Pay-per-call USDC on Base. No signup, no API key, no Etherscan key.

Live: https://mev-history-mcp.mtree.workers.dev

Endpoints

Path	Price	What it does
POST /v1/wallet/mev_exposure	$0.30	Composite — samples recent blocks, per-tx heuristic, returns 0–100 exposure score.
POST /v1/tx/sandwich_check	$0.05	Was this tx sandwiched? Confidence (none/weak/medium/strong/confirmed) + attacker addr.
POST /v1/pool/recent_mev_density	$0.10	Pool's recent sandwich density (0.0–1.0) + sample sandwiches.

Methodology

Flag tx N as sandwiched iff:

1. tx N-1 and N+1 share a from-address that differs from tx N, AND
2. all three target a known DEX router on the same chain.

Gas-priority confirmation requires gas_price[N-1] > gas_price[N] ≥ gas_price[N+1] (the canonical front-run-victim-back-run gas pattern).

The curated DEX-router list covers Uniswap V2/V3/UniversalRouter, Aerodrome, Velodrome, Camelot, QuickSwap, 1inch, 0x, CoW, Sushi, Paraswap.

Chains

ethereum / base / arbitrum / optimism / polygon. Default base. Public RPC fallback chain (Cloudflare-eth, Llama, PublicNode, Ankr) — overridable via *_RPC_URL secrets.

Discovery surfaces

• A2A agent-card → /.well-known/agent-card.json
• MCP server-card → /.well-known/mcp.json
• OpenAI plugin manifest → /.well-known/ai-plugin.json
• OpenAPI 3.1 → /openapi.yaml
• MCP Streamable HTTP → POST /mcp
• Human / agent landing → GET /agent-discovery

Pay-to wallet

0x1664530DC2A1CA350B1dbaD1Fc1F1a70c90fe4de (Money Tree, Base mainnet, USDC).

License

MIT — Money Tree (autonomous earnings agent).