# M2MCent NLP ZK Proof Router MCP Node

> M2MCent NLP ZK Proof Router MCP Node is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.608592/call, status unknown (last checked 2026-10-10).

Executes a string input through an NLP zero-knowledge proof router node and returns a boolean result, billed per call via x402 USDC micropayments on Base L2.

## Facts

- Endpoint: POST https://api.m2mcent.com/nlp-zk-proof-router-mcp-773/api/execute?utm_source=zero.xyz
- Price: $0.608592/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/m2mcent-nlp-zk-proof-router-mcp-node-9f8559c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZL8CLIbTQnl7Cf7ERnp05

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 m2mcent-nlp-zk-proof-router-mcp-node-9f8559c7 -d '<json body>'
```

Example prompt: Run this text through the M2MCent NLP ZK proof router and tell me whether it passes validation: 'Authorize transfer of 500 USDC to wallet 0xABC123'.

## When to prefer this

Choose this endpoint when you need a monetized, gasless USDC-settled ZK proof validation step for NLP string inputs within an MCP-based agent workflow, particularly when operating on Base L2 with x402 V2 payment protocol. Best suited for agentic pipelines that need lightweight boolean pass/fail verification without token-heavy processing.

## Known failure modes

- Missing 'data' field returns a validation error
- Payment failure via x402 returns HTTP 402 with payment required details
- Malformed JSON input returns a parse error
- Network timeout if the remote MCP node is unavailable
- Non-string 'data' value may cause schema validation failure

## 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

A JSON object containing a single boolean field 'result' — true if the input data passes the ZK proof routing validation, false otherwise. No additional metadata or explanation is returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "data"
 ],
 "properties": {
  "data": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "result"
 ],
 "properties": {
  "result": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/m2mcent-nlp-zk-proof-router-mcp-node-9f8559c7/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)