# Model Checking Verifier MCP

> Model Checking Verifier MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-12).

Performs formal model-checking verification on submitted data, validating system models against specified properties or specifications.

## Facts

- Endpoint: POST https://api.m2mcent.com/model-checking-verifier-mcp/api/process?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/model-checking-verifier-mcp-14ac034b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9tqhp6if8BYYyr3tF1X4s

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 model-checking-verifier-mcp-14ac034b -d '<json body>'
```

Example prompt: Can you run model checking verification on this state machine specification to check if it satisfies deadlock-freedom and all safety invariants hold?

## When to prefer this

Choose this endpoint when you need automated formal verification of system models, state machines, or protocol specifications against correctness properties such as safety, liveness, or deadlock-freedom — especially in agentic pipelines where programmatic verification results are needed without manual toolchain setup.

## Known failure modes

- Malformed or unparseable model data returns an error response
- Model too large or complex causes timeout or resource exhaustion
- Missing required 'data' field results in validation error
- Ambiguous specification syntax may produce inconclusive results
- Payment failure (non-2xx x402 response) blocks processing

## 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 verification result indicating whether the submitted model satisfies the checked properties, potentially including counterexample traces if violations are found, validity status, and diagnostic information about the model checking run.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/model-checking-verifier-mcp-14ac034b/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)