# Optimistic Rollup Challenger MCP

> Optimistic Rollup Challenger MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-10-15).

Processes optimistic rollup challenge operations, verifying or disputing state transitions on Layer 2 chains via a managed MCP endpoint.

## Facts

- Endpoint: POST https://api.m2mcent.com/optimistic-rollup-challenger-mcp/api/process?utm_source=zero.xyz
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/optimistic-rollup-challenger-mcp-c1270726
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6dB07duKARPwgv1IrykRL

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 optimistic-rollup-challenger-mcp-c1270726 -d '<json body>'
```

Example prompt: Can you run a challenge check on this optimistic rollup state data and tell me if it's valid or if there's a fraudulent state transition I should dispute?

## When to prefer this

Choose this endpoint when you need to programmatically challenge or validate optimistic rollup state transitions in an automated agent pipeline, particularly when you lack local infrastructure to run a full challenge node. Best suited for agents monitoring L2 integrity or enforcing rollup correctness on-demand.

## Known failure modes

- Malformed or incomplete state data string returns a validation error
- Invalid rollup format causes processing failure
- Network or upstream chain latency may cause timeouts
- Payment not received results in 402 response blocking processing
- Empty data field returns an error without meaningful challenge output

## 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 structured result indicating whether the submitted rollup state data is valid or fraudulent, along with challenge status, dispute eligibility, and any fraud proof details derived from the processed input.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/optimistic-rollup-challenger-mcp-c1270726/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)