# FHI MCP Security Monitoring

> FHI MCP Security Monitoring is a paid API for AI agents from polished-truth-c514.fhi-llc-1118.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Provides stateful security monitoring for remote MCP (Model Context Protocol) endpoints, tracking and evidencing changes via a chat-completion-style API with per-call micropayments.

## Facts

- Endpoint: POST https://polished-truth-c514.fhi-llc-1118.workers.dev/v1/chat/completions?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fhi-mcp-security-monitoring-b2a0e274
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Be7bT8i_kei3sp-B9eqnR

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 fhi-mcp-security-monitoring-b2a0e274 -d '<json body>'
```

Example prompt: Check the FHI MCP Security Monitoring service for any recent changes or anomalies in our remote MCP server — send a monitoring query with up to 256 tokens and default temperature, and return whatever change evidence it surfaces.

## When to prefer this

Choose this endpoint when you need stateful, evidence-based security monitoring specifically for remote MCP (Model Context Protocol) servers and want per-call micropayment pricing via x402/Base USDC rather than a subscription. Best suited for AI agent pipelines that need to periodically verify MCP tool integrity and capture change evidence.

## Known failure modes

- Payment not included or insufficient USDC — 402 Payment Required response
- Messages array is empty (minItems:1 violated) — 400 validation error
- max_tokens or max_completion_tokens outside 16-512 range — 400 validation error
- temperature outside 0-2 range — 400 validation error
- Cloudflare Worker timeout on stateful monitoring operations
- Malformed JSON body — 400 parse error

## How this service works

Stateful remote-MCP change evidence, payable per call with x402 Base USDC.

## Output

A chat completion response in OpenAI-compatible format containing an assistant message with change evidence, security findings, or monitoring status for the queried MCP endpoint, along with a finish reason indicating how the response concluded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "type": "string"
  },
  "tools": {
   "type": "array"
  },
  "messages": {
   "type": "array",
   "minItems": 1
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 512,
   "minimum": 16
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  },
  "tool_choice": {},
  "max_completion_tokens": {
   "type": "integer",
   "maximum": 512,
   "minimum": 16
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-example",
  "object": "chat.completion",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "..."
    },
    "finish_reason": "stop"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhi-mcp-security-monitoring-b2a0e274/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polished-truth-c514.fhi-llc-1118.workers.dev](https://www.zero.xyz/host/polished-truth-c514.fhi-llc-1118.workers.dev/llms.txt)