create-mcp

create-mcp is a skill for Claude Code, Codex from davekilleen/Dex. It costs 82 tokens per session (5,209 once invoked), scanned B, original, no licence file.

A guided workflow for building a new MCP integration, which lets an agent connect to an external tool or service.

In plain words
What is it for?
It helps design and create an MCP server for a tool that the agent needs to access.
Why use it?
It helps when no ready-made connection exists and the agent cannot yet work with a particular tool.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is DEX_MCP_ONCE_TOKEN=$(./.venv/bin/python core/utils/smoke.py \.

Good fit It helps design and create an MCP server for a tool that the agent needs to access.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/davekilleen/Dex
agentmods
npx agentmods add skills/davekilleen/dex/create-mcp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for create-mcp

README.md
[![agentmods](https://agentmods.dev/badge/skills/davekilleen/dex/create-mcp/github.svg)](https://agentmods.dev/skills/davekilleen/dex/create-mcp)
Your own site
<a href="https://agentmods.dev/skills/davekilleen/dex/create-mcp"><img src="https://agentmods.dev/badge/skills/davekilleen/dex/create-mcp/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for create-mcp

Your own site · 80×15
<a href="https://agentmods.dev/skills/davekilleen/dex/create-mcp"><img src="https://agentmods.dev/badge/skills/davekilleen/dex/create-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,209 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00082 $0.05209
Opus 5 $0.00041 $0.02604
Sonnet 5 $0.00016 $0.01042
Haiku 4.5 $0.00008 $0.00521

Measured 8d ago against content hash 49b977c3a8f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade B, and why

create-mcp scanned grade B with 1 finding 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 8d 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.

Or add to your shell config / the vault-root `.env` file (keep `.env` owner-only: `chmod 600 .env`).
.agents/skills/create-mcp/SKILL.md · 743 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. 8d ago First seen · 743 lines · 82 tokens per session scan B 49b977c3a8f0

Subscribe to this mod's changes

create-mcp is a skill published in the GitHub repository davekilleen/Dex (476 stars, last pushed today), with no licence file. It adds 82 tokens to every session and 5,209 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-02.

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