# Auth-Sentinel MCP

> Auth-Sentinel MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-16).

Processes authentication and security sentinel operations via a monetized MCP node endpoint using the x402 micropayment protocol.

## Facts

- Endpoint: POST https://api.m2mcent.com/auth-sentinel-mcp/api/process?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/auth-sentinel-mcp-ea02d22e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VKXQAYz_PBV5aK9rgVIcJ

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 auth-sentinel-mcp-ea02d22e -d '<json body>'
```

Example prompt: Run this authentication data through the Auth-Sentinel MCP to validate it and tell me if it passes the security check.

## When to prefer this

Choose this endpoint when you need a pay-per-use, micropayment-gated authentication sentinel check via the x402 protocol and an MCP-compatible interface. It is suitable for agent workflows that require lightweight, on-demand auth validation without maintaining a persistent auth service, especially in M2M (machine-to-machine) contexts where USDC micropayments are acceptable.

## Known failure modes

- Malformed or missing 'data' field returns a 400 error
- Payment not provided or insufficient USDC results in 402 Payment Required response
- Sentinel logic rejects invalid or malformed credential data
- Network timeout if the remote MCP node is unavailable
- Unexpected data formats may produce undefined sentinel behavior

## 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 processed response from the auth-sentinel MCP node indicating whether the submitted data passes authentication or sentinel validation checks. The exact response structure depends on the underlying sentinel logic but typically includes a pass/fail status and any relevant metadata from the security check.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/auth-sentinel-mcp-ea02d22e/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)