Skills/PyPI/mcp-cfdi-mx

mcp-cfdi-mx@0.4.1

VERIFIED

Publisher claims: "MCP server for Mexican electronic invoicing (CFDI 4.0, Complemento de Pagos 2.0), PAC-agnostic sealing" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher cmendezs · joined 1 days agoInstalls 503Last detonated 14 h ago
$claude mcp add mcp-cfdi-mx -- uvx mcp-cfdi-mx
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Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-07 and scored it 84/100 (Verified). It did what it claims and nothing else we could detect: no undeclared network egress, no credential reads, no persistent instruction writes. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1
0.2sprocessexec /usr/bin/date
0.2sprocessexec /usr/bin/timeout
0.2sprocessexec .venv/bin/mcp-cfdi-mx
0.2sclaimedno tools/list reply (exit 0)
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

HIGH
Hidden zero-width characters detectedsrc/mcp_cfdi_mx/resources/catPagos.xsd.xml:1 · Hidden zero-width characters detected — may conceal contentFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07

No other findings across 15,294 lines in 70 files.

Cost to the agent

Instructions loaded
≈61 tok
1 file · 70 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for mcp-cfdi-mx@0.4.1 as of 14 h ago. This is the package itself, not its dependencies.

mcp-cfdi-mx@0.4.1 safety verdict: Verified 84/100 — KillerSkills