# Backrun Arbitrage Blocker MCP

> Backrun Arbitrage Blocker MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-16).

Detects and blocks backrun arbitrage attempts in transaction data to protect against MEV exploitation

## Facts

- Endpoint: POST https://api.m2mcent.com/backrun-arbitrage-blocker-mcp/api/process?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/backrun-arbitrage-blocker-mcp-2df65bc1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1XEz6cca2JGLG4MKUSjhQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability backrun-arbitrage-blocker-mcp-2df65bc1 -d '<json body>'
```

Example prompt: Check this transaction data for backrun arbitrage risk and block it if it looks vulnerable to MEV exploitation: '{"tx":"0xabc123...","pool":"ETH/USDC","amount":"5000"}'.

## When to prefer this

Choose this endpoint when you need real-time pre-submission screening of DeFi transactions for MEV backrun arbitrage risk, particularly when operating automated trading bots or executing large swaps where backrunning could cause significant financial loss.

## Known failure modes

- Malformed or non-JSON data string returns a validation error
- Empty data field results in a bad request response
- Ambiguous transaction format may reduce detection accuracy
- Service unavailability or timeout after $0.25 USDC charge with no result
- False negatives for novel arbitrage patterns not yet recognized

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

Returns an assessment of whether the submitted transaction or trade data contains backrun arbitrage vulnerabilities, along with a block decision or risk score indicating whether the transaction should be halted or allowed to proceed.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/backrun-arbitrage-blocker-mcp-2df65bc1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)