mcp server
FabTally Guard
Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.
Description as published by the maintainer. Source
- version 1.0.0
- active
active — Registry entry last updated 2026-08-01.
What this server can do
4 functions, named and described by the server itself. Parameter names are shown because they say more about what a function does than its name usually does.
deps_check(name, version, ecosystem, x_payment)- 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. Required: ecosystem, name.
json_repair(json, schema, x_payment)- 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. Required: json, schema.
url_read(url, x_payment)- 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. Required: url.
x402_preflight(url, x_payment)- 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. Required: url.
Last successful function declaration observed on . Source: https://guard.fabtally.com/mcp. We list what the server declared; we do not call any of these functions.
Endpoint status observed on . Source: https://guard.fabtally.com/mcp.
Signals
These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.
| Signal | Value | What it measures | Window | Observed | Source |
|---|---|---|---|---|---|
| Latest published version | 1.0.0 | Latest version string the maintainer published to the registry. | as of fetch | Model Context Protocol | |
| Registry record last updated | 2026-08-01 | When the registry record was last updated by its maintainer. | point in time | Model Context Protocol | |
| First listed in the MCP Registry | 2026-08-01 | Date this server was first published to the official MCP Registry. Not a usage or quality measure. | point in time | Model Context Protocol | |
| mcp tools declared | 4 tools | Number of functions the server itself declared when asked to list them. This is what the server offers an agent, not a measure of how well any of them work. | as of probe | guard.fabtally.com | |
| mcp endpoint status | ok | The server listed 4 functions when asked. | as of probe | guard.fabtally.com |
Where to get it
Also from zvmzaretsky
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FabTally Decode
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FabTally Utility Belt
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FabTally Valid
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This record as data
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