Skills building-mcp-servers

📦

building-mcp-servers

Name: building-mcp-servers
Author: C0ntr0lledCha0s

v1.0.0 Content revision r1 Medium Risk 🌐 Network access🔑 Env variables📁 Filesystem access⚙️ External commands

Build Secure MCP Server Integrations

MCP setup can expose secrets, weak URLs, or fragile plugin configuration. This skill guides secure server selection, configuration, validation, and documentation for Claude Code plugins.

Supports: Claude Codex Code(CC)

📊 74 Adequate

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request

Review the Skillstore skill "building-mcp-servers" from https://skillstore.io/skills/c0ntr0lledcha0s-building-mcp-servers.md and its manifest at https://skillstore.io/api/skills/c0ntr0lledcha0s-building-mcp-servers/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/c0ntr0lledcha0s-building-mcp-servers.md Signed manifest GET /api/skills/c0ntr0lledcha0s-building-mcp-servers/manifest Signed lockfile GET /api/skills/c0ntr0lledcha0s-building-mcp-servers/lockfile

Test it

Using "building-mcp-servers". I need to connect a plugin to a hosted REST service.

Expected outcome:

A recommended HTTP MCP setup, required environment variables, HTTPS guidance, and validation steps before publishing.

Using "building-mcp-servers". Check this MCP config before release.

Expected outcome:

Findings grouped by errors, warnings, and recommendations.
Notes for insecure protocols, hardcoded secrets, and non-portable paths.
A short list of release-blocking fixes.

Using "building-mcp-servers". Document the secrets needed by my MCP server.

Expected outcome:

A concise setup section that names each environment variable and explains how users should store credentials.

Security Audit

Medium Risk

v8 • 7/5/2026 Open versioned report

Most static findings are false positives from Markdown examples, placeholder URLs, placeholder environment variables, and defensive validation logic. One semantic risk remains: the documentation includes an unpinned npx-based MCP server example that could create supply-chain exposure if copied into production. No prompt injection, credential exfiltration intent, or malicious network behavior was found.

Files scanned

862

Lines analyzed

Review items

False positives ignored

Confirmed security concerns (1)

Medium

SKILL.md:281-290

Unpinned Runtime Package Execution Example

The database integration example uses npx -y to run an MCP server package without a version pin. Users who copy it may fetch and execute changing third-party code at runtime.

The example configuration directly names npx -y and an npm package without a pinned version. It is documentation rather than automatic execution, so the risk is real but limited.

Risk Factors

🌐 Network access (12)

references/mcp-security-guide.md:22 references/mcp-security-guide.md:59 references/mcp-security-guide.md:64 scripts/validate-mcp.py:83 SKILL.md:58 SKILL.md:80 SKILL.md:191 SKILL.md:194 SKILL.md:303 templates/mcp-config-template.json:14 templates/mcp-config-template.json:22 templates/mcp-http-template.json:5

🔑 Env variables (21)

📁 Filesystem access (5)

scripts/validate-mcp.py:10 scripts/validate-mcp.py:11 scripts/validate-mcp.py:200 scripts/validate-mcp.py:201 SKILL.md:250

⚙️ External commands (50)

SKILL.md:30-43 SKILL.md:43-53 SKILL.md:53-65 SKILL.md:65-75 SKILL.md:75-87 SKILL.md:87-97 SKILL.md:97-109 SKILL.md:109-121 SKILL.md:121-127 SKILL.md:127-130 SKILL.md:130-137 SKILL.md:137-142 SKILL.md:142-154 SKILL.md:154-159 SKILL.md:159-161 SKILL.md:161-164 SKILL.md:164-165 SKILL.md:165-166 SKILL.md:166-167 SKILL.md:167-172 SKILL.md:172-186 SKILL.md:186-189 SKILL.md:189-195 SKILL.md:195-199 SKILL.md:199-204 SKILL.md:204-205 SKILL.md:205-206 SKILL.md:206-210 SKILL.md:210-220 SKILL.md:220-224 SKILL.md:224-229 SKILL.md:229-247 SKILL.md:247-252 SKILL.md:252-255 SKILL.md:255-261 SKILL.md:261-268 SKILL.md:268-270 SKILL.md:270-282 SKILL.md:282-295 SKILL.md:295-298 SKILL.md:298-311 SKILL.md:311-314 SKILL.md:314-327 SKILL.md:327-338 SKILL.md:338-347 SKILL.md:347-361 SKILL.md:361-362 SKILL.md:362-363 SKILL.md:363-366 SKILL.md:366-367

Audited by: codex View Audit History →

Share & cite this report

Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.

Open versioned report

Copy report link

https://skillstore.io/skills/c0ntr0lledcha0s-building-mcp-servers/audits/8?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report

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Academic citations (APA · BibTeX · CFF)

APA citation

C0ntr0lledCha0s. (2026). building-mcp-servers security audit report (audit version 8) [Author version 1.0.0]. Skillstore. https://skillstore.io/skills/c0ntr0lledcha0s-building-mcp-servers/audits/8

BibTeX citation

@techreport{c0ntr0lledcha0s-c0ntr0lledcha0s-building-mcp-servers-2026,
  author = {C0ntr0lledCha0s},
  title = {building-mcp-servers security audit report (audit version 8)},
  institution = {Skillstore},
  year = {2026},
  number = {8},
  url = {https://skillstore.io/skills/c0ntr0lledcha0s-building-mcp-servers/audits/8},
  note = {Author version 1.0.0}
}

CITATION.cff

cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "building-mcp-servers security audit report (audit version 8)"
version: "1.0.0"
type: report
authors:
  - name: "C0ntr0lledCha0s"
date-released: "2026-07-05"
url: "https://skillstore.io/skills/c0ntr0lledcha0s-building-mcp-servers/audits/8"
identifiers:
  - type: other
    value: "skillstore:c0ntr0lledcha0s-building-mcp-servers:audit:8"
    description: "Skillstore immutable audit report identifier"

Compare variants

2 installable variants

Each author remains a separate installable skill. The recommended variant is ranked by Skillstore evidence.

Why this variant is first

Highest Skillstore Score

Author / source Skillstore Score Evidence Confidence Skillstore usage Updated

C0ntr0lledCha0s Recommended Current

c0ntr0lledcha0s-building-mcp-servers

Skillstore Score 74

Evidence Confidence High

Skillstore usage 9

Updated

2026-08-21

Asmayaseen

asmayaseen-building-mcp-servers

Skillstore Score 38

Evidence Confidence Medium

Skillstore usage 14

Updated

2026-08-21

Skillstore Score

Why this score Evidence Confidence: High

Architecture

100

Maintainability

Content

Community

Spec Compliance

What You Can Build

Add a Hosted API MCP Integration

Configure a Claude Code plugin to connect to a secure hosted MCP endpoint with documented authentication.

Validate Plugin MCP Configuration

Check an MCP configuration for required fields, weak URL schemes, hardcoded secrets, and path portability.

Document Required Secrets

Create clear setup notes for environment variables, credential storage, and safe local testing.

Try These Prompts

Choose a Server Type

Help me choose the right MCP server type for a Claude Code plugin that connects to [service]. Ask for any missing requirements.

Create a Secure Config

Draft an MCP configuration for [service] using [stdio, HTTP, SSE, or WebSocket]. Use environment variables for every secret.

Review an Existing Config

Review this MCP configuration for security, portability, and Claude Code compatibility. List required fixes before publishing.

Design a Plugin Integration Plan

Create an end-to-end plan to add MCP support to this plugin, including manifest changes, validation, documentation, and test steps.

Best Practices

Use environment variable references for every credential and document each required variable.
Use HTTPS or WSS for remote servers, with localhost exceptions only for development.
Restrict auto-allowed MCP tools to the smallest safe set.

Avoid

Do not hardcode API keys, bearer tokens, passwords, or database URLs in MCP configuration.
Do not use HTTP or WS for remote MCP services that transmit sensitive data.
Do not enable broad MCP tool access before reviewing tool permissions and side effects.