# MEV Boost Relay MCP

> MEV Boost Relay 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).

Processes MEV-boost relay data for Ethereum block building and proposer-builder separation workflows.

## Facts

- Endpoint: POST https://api.m2mcent.com/mev-boost-relay-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/mev-boost-relay-mcp-ed0f3a20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xa7SqRNvxJtDtIxn-NZIb

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 mev-boost-relay-mcp-ed0f3a20 -d '<json body>'
```

Example prompt: Can you process this MEV boost relay payload and return the block building result for my Ethereum validator node?

## When to prefer this

Choose this endpoint when you need to interact with a MEV-boost relay in the Ethereum proposer-builder separation (PBS) ecosystem and require a managed API interface rather than running your own relay infrastructure.

## Known failure modes

- Invalid or malformed data string returns a processing error
- Empty data field causes a bad request response
- Relay backend unavailable results in a timeout or 503 error
- Unsupported payload format may return an unrecognized input error

## 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 processed MEV-boost relay output including block building results, bid data, relay status, or proposer-builder separation response, depending on the submitted data payload.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mev-boost-relay-mcp-ed0f3a20/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)