claude-codex-settings is a collection of configurations and reusable extensions for Claude Code, OpenAI Codex, Cursor, and related coding tools. Developers use its skills, commands, hooks, agents, plugins, and MCP servers to shape coding-agent workflows and connect alternative model APIs. The catalogue entries are components of this collection that can be installed into supported coding tools.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add fcakyon/claude-codex-settings --skill mongodb-mcp-setupgit clone --depth 1 https://github.com/fcakyon/claude-codex-settingsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/fcakyon/claude-codex-settings/mongodb-mcp-setup)<a href="https://agentmods.dev/skills/fcakyon/claude-codex-settings/mongodb-mcp-setup"><img src="https://agentmods.dev/badge/skills/fcakyon/claude-codex-settings/mongodb-mcp-setup.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 9 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Agent Snooping · line 45 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 59 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 62 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 215 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 285 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 320 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- medium Rogue Agent · line 136 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Privilege Escalation · line 265 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Rogue Agent · line 312 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00057 | $0.03233 |
| Opus 5 | $0.00028 | $0.01617 |
| Sonnet 5 | $0.00011 | $0.00647 |
| Haiku 4.5 | $0.00006 | $0.00323 |
Grade C, and why
mongodb-mcp-setup scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
chmod 600 ~/.mcp-env Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- **If any `CODEX_*` variables are present** → the user is running **Codex**. Credentials are stored in `~/.codex/config.toml` (macOS/Linux) or `%USERPROFILE%\.codex\config.toml` (Windows), not in shell environment varia Copies of this mod
2 near-identical copies found in the catalogue:
- mongodb-mcp-setup — 100% identical, 0 lines differ
- mongodb-mcp-setup — 92% identical, 61 lines differ
How it starts
The opening of the file, as written. The whole thing — 325 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MongoDB MCP Server Setup
This skill guides users through configuring the MongoDB MCP server for use with an agentic client.
Overview
The MongoDB MCP server requires authentication. Users have three options:
-
Connection String (Option A): Direct connection to a specific cluster
- Quick setup for single cluster
- Requires
MDB_MCP_CONNECTION_STRINGenvironment variable
-
Service Account Credentials (Option B): MongoDB Atlas Admin API access
- Recommended for Atlas users - simplifies authentication and data access
- Access to Atlas Admin API and dynamic cluster connection via
atlas-connect-cluster - No manual DB user credential management
- Requires
MDB_MCP_API_CLIENT_IDandMDB_MCP_API_CLIENT_SECRETenvironment variables
-
Atlas Local (Option C): Local development with Docker
- Best for local testing - zero configuration required
- Runs Atlas locally in Docker, requires Docker installed
- No credentials or cloud cluster access
This is an interactive step-by-step guide. The agent detects the user's environment and provides tailored instructions, but never asks for or handles credentials — users add those directly to their shell profile or agentic client config in Step 5. Make this clear to the user whenever credentials come up in Steps 3a and 3b.
Step 0: Detect Client
Before anything else, determine which agentic client the user is running. This controls how credentials are configured in Step 1 and Step 5.
Run:
env | grep "^CODEX_"
- If no
CODEX_*variables are present → the user is running a shell-based client (Claude, Cursor, Gemini CLI, Copilot CLI, etc.). Credentials are configured via shell profile environment variables. - If any
CODEX_*variables are present → the user is running Codex. Credentials are stored in~/.codex/config.toml(macOS/Linux) or%USERPROFILE%\.codex\config.toml(Windows), not in shell environment variables. The desktop app does not inherit shell env vars when launched from Finder, Launchpad, or the Windows Start menu.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 325 lines · 57 tokens per session scan C a2916a602732
mongodb-mcp-setup is a skill published in the GitHub repository fcakyon/claude-codex-settings (1,133 stars, last pushed 2d ago), licensed Apache-2.0. It adds 57 tokens to every session and 3,233 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (asks for root, reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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