# Web3 Biometric Validator (Audio) MCP Node

> Web3 Biometric Validator (Audio) MCP Node is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $1.456922/call, status unknown (last checked 2026-10-12).

Validates audio input biometrically and returns a boolean result, presumably confirming identity or authenticity of a voice sample.

## Facts

- Endpoint: POST https://api.m2mcent.com/web3-biometric-validator-mcp-57/api/execute?utm_source=zero.xyz
- Price: $1.456922/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/web3-biometric-validator-audio-mcp-node-2ae00d9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XFWFWewvFGrd25FXJxT6m

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 web3-biometric-validator-audio-mcp-node-2ae00d9f -d '<json body>'
```

Example prompt: Can you run a biometric validation on this audio sample and tell me if it passes — just give me a true or false result?

## When to prefer this

Choose this endpoint when you need a lightweight, single-call biometric validation of an audio/voice sample that returns a simple boolean result, especially in x402-payment-enabled agentic pipelines on Base L2. Best suited when you only need a pass/fail decision rather than detailed biometric scores or metadata.

## Known failure modes

- Missing or malformed audio field returns a validation error
- Audio format not supported may cause processing failure
- Ambiguous or low-quality audio may yield unreliable boolean results
- Payment failure via x402 protocol results in 402 response before execution
- Timeout if audio payload is too large or encoding is unsupported

## 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 indicating whether the audio input passed biometric validation (true = validated, false = not validated).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/web3-biometric-validator-audio-mcp-node-2ae00d9f/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)