# Zero Knowledge Contract Validator MCP

> Zero Knowledge Contract Validator MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.45/call, status unknown (last checked 2026-10-12).

Validates smart contracts or data inputs using zero-knowledge proof techniques via a monetized MCP node on the M2MCent network

## Facts

- Endpoint: POST https://api.m2mcent.com/zero-knowledge-contract-validator-mcp/api/process?utm_source=zero.xyz
- Price: $0.45/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zero-knowledge-contract-validator-mcp-2236a13a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u6Y5epKEX8Avu_3r2YRts

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 zero-knowledge-contract-validator-mcp-2236a13a -d '<json body>'
```

Example prompt: Can you validate this smart contract data using the zero-knowledge contract validator and tell me if it passes — here is the payload: '{"contract":"0xABC123","params":{"amount":500}}'?

## When to prefer this

Choose this endpoint when you need cryptographic zero-knowledge validation of smart contract data or transaction parameters on Base L2 without exposing raw inputs, and when you require an on-chain attestation hash as proof. Prefer this over generic contract auditing tools when privacy-preserving verification and gasless USDC micropayment settlement are requirements.

## Known failure modes

- Invalid or malformed data string returns a failed validation response
- Network or Base L2 congestion may delay settlement confirmation
- Insufficient USDC balance for the $0.45 per-call fee causes payment failure
- Unsupported contract format or schema in the data field may return success:false
- Malformed JSON in the data payload may cause a processing 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 a JSON object containing a transaction hash (txHash) on Base L2 and a boolean success field indicating whether the zero-knowledge validation passed. On success, txHash contains the on-chain settlement reference for the gasless USDC payment and the validation attestation.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zero-knowledge-contract-validator-mcp-2236a13a/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)