# FabTally Guard (remote · guard.fabtally.com)

Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.

- Trust score: 61/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `guard.fabtally.com`: 61/100 (this document), [markdown](https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard.md), [page](https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard)

## Channel facts

- Endpoint: `https://guard.fabtally.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 61/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 791 tokens (~197/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http zvmzaretsky-fabtally-guard https://guard.fabtally.com/mcp
```

### Codex

```toml
[mcp_servers.zvmzaretsky-fabtally-guard]
url = "https://guard.fabtally.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "zvmzaretsky-fabtally-guard": {
      "type": "remote",
      "url": "https://guard.fabtally.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add zvmzaretsky-fabtally-guard --url https://guard.fabtally.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  zvmzaretsky-fabtally-guard:
    url: "https://guard.fabtally.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "zvmzaretsky-fabtally-guard": {
      "type": "http",
      "url": "https://guard.fabtally.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 60, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-08-01 (score 60)

First indexed and scored.

## MCP tools (4)

### `deps_check` (~225 tokens)

Vet a dependency before install (paid $0.003)

PAID $0.003 (x402, USDC on Base). Vet a software package BEFORE installing it. Returns existence, latest-vs-requested, deprecation/yank markers, known CVEs from OSV.dev, typosquat similarity to popular names, SPDX license, and age/download signals with a plain-English risk verdict. Args: ecosystem (npm|pypi|crates), name, version (optional). Without payment returns the x402 challenge; pass x_payment to settle.

Input parameters:

- `ecosystem` (string, required): Package ecosystem: npm | pypi | crates.
- `name` (string, required): Package name, e.g. 'lodash', 'requests', 'serde'.
- `version` (string): Specific version to check for CVEs (optional; defaults to latest).
- `x_payment` (string): x402 payment payload (base64) for this PAID check. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price…

### `x402_preflight` (~196 tokens)

Verify an x402 endpoint before paying (paid $0.002)

PAID $0.002 (x402, USDC on Base). Verify another x402 endpoint BEFORE paying it: does an unpaid call return a valid x402 v2 402 challenge? do the quoted amount/asset/network/payTo match the site's /.well-known/x402? is TLS valid, host reachable, openapi present? Returns pass/fail + per-check reasons + the parsed price you would pay. Args: url. Without payment returns the x402 challenge; pass x_payment to settle.

Input parameters:

- `url` (string, required): The x402 endpoint URL to verify, e.g. https://example.com/v1/thing.
- `x_payment` (string): x402 payment payload (base64) for this PAID check. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price…

### `json_repair` (~211 tokens)

Repair near-miss LLM JSON to a schema (paid $0.002)

PAID $0.002 (x402, USDC on Base). Coerce near-miss LLM JSON to a JSON-Schema-conformant object: strip code fences/prose, fix trailing commas/quotes/unquoted keys, normalise Python literals, balance brackets, then coerce types, apply defaults, and drop extraneous keys. Returns the repaired object OR precise per-field errors. Args: json (the raw string), schema (a JSON Schema object). Without payment returns the x402 challenge.

Input parameters:

- `json` (string, required): The raw, possibly-malformed JSON text to repair.
- `schema` (object, required): A JSON Schema (draft 2020-12) object the result must conform to.
- `x_payment` (string): x402 payment payload (base64) for this PAID check. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price…

### `url_read` (~159 tokens)

Public url -> clean Markdown + token count (paid $0.004)

PAID $0.004 (x402, USDC on Base). Fetch a PUBLIC url and return clean Markdown + a token estimate for RAG ingestion — readability extraction, boilerplate stripped. Respects robots.txt, public pages only, no login/paywall bypass, nothing stored. Args: url. Without payment returns the x402 challenge; pass x_payment to settle.

Input parameters:

- `url` (string, required): The public web page URL to fetch and convert to Markdown.
- `x_payment` (string): x402 payment payload (base64) for this PAID check. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price…

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard#diagnostics

## Score history

- 2026-08-03: 61
- 2026-08-02: 60
- 2026-08-01: 60

## Links

- Remote endpoint: https://guard.fabtally.com/mcp
- Repository: https://github.com/zvmzaretsky/fabtally-guard-mcp
- Website: https://guard.fabtally.com/
- Changelog RSS feed: https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard/changelog.json
- HTML version of this page: https://verifymcp.io/servers/zvmzaretsky-fabtally-guard/guard