# Private Mempool Router MCP

> Private Mempool Router 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).

Routes transactions through a private mempool to avoid frontrunning and MEV attacks on blockchain networks

## Facts

- Endpoint: POST https://api.m2mcent.com/private-mempool-router-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/private-mempool-router-mcp-55d19b81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hTYBG7vT1gfvTCY-k_PLN

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 private-mempool-router-mcp-55d19b81 -d '<json body>'
```

Example prompt: Submit this raw transaction through the private mempool router so it doesn't get exposed to frontrunners or sandwich bots before it's confirmed on-chain.

## When to prefer this

Choose this endpoint when you need to submit blockchain transactions without exposing them to the public mempool, particularly for high-value DeFi trades vulnerable to MEV, sandwich attacks, or frontrunning. Prefer this over standard RPC submission when protecting transaction privacy and execution price is critical.

## Known failure modes

- Invalid or malformed transaction data returns an error response
- Transaction rejected by private relay due to insufficient gas or nonce issues
- Network congestion may cause delayed or failed private mempool inclusion
- Unsupported chain or transaction format returns a validation error
- Service unavailable or timeout if the private relay is unreachable

## 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 a confirmation that the transaction was submitted to the private mempool relay, along with a transaction hash or submission ID indicating the routing outcome without public mempool exposure.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/private-mempool-router-mcp-55d19b81/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)