Agent skill

MCP Client

by coleam00 in coleam00/second-brain-skills

Universal MCP client for connecting to any MCP server with progressive disclosure.

No licenceAuto-check passedAgent Workflows

Install MCP Client

skills CLI
$ npx skills add coleam00/second-brain-skills --skill mcp-client -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install coleam00/second-brain-skills mcp-client --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/coleam00/second-brain-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/mcp-client .claude/skills/mcp-client && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
mcp-client
GitHub stars
832
Token cost
~1k tokens
SKILL.md length
251 words
Files
5 (incl. scripts, references)
Skills in repo
4
Repo updated
First seen
Licence
None found

At a glance

Universal MCP client for connecting to any MCP server with progressive disclosure.

  • Works in 4 steps: MCP_CONFIG_PATH env var (custom path) → references/mcp-config.json (this skill's… → .mcp.json in project root → …
  • Interacting with external MCP servers (Zapier
  • SKILL.md covers Skill Location, Configuration, Running Commands and Workflow, plus 7 more sections
  • Runs Python scripts from its folder; calls python and pip; reaches mcp.zapier.com

What it does

MCP Client is an agent skill from coleam00/second-brain-skills. Universal MCP client for connecting to any MCP server with progressive disclosure. Wraps MCP servers as skills to avoid context window bloat from tool definitions. Use when interacting with external MCP servers (Zapier, Sequential Thinking, GitHub, filesystem, etc.), listing available tools, or executing MCP tool calls. Triggers on requests like "connect to Zapier", "use MCP server", "list MCP tools", "call Zapier action", "use sequential thinking", or any MCP server interaction.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts and reference files (for example `references/example-mcp-config.json`, `references/mcp-servers.md` and `references/python-mcp-sdk.md`).

It sits in Agent Workflows, covering MCP servers and Workflow automation. It works with Model Context Protocol, Zapier and GitHub. The repository describes itself as: A collection of Claude Skills to turn Claude Code into a Second Brain.

When your agent uses it

  • Interacting with external MCP servers (Zapier
  • Sequential Thinking
  • Listing available tools
  • Executing MCP tool calls

Example prompts

  • “connect to Zapier”
  • “use MCP server”
  • “list MCP tools”
  • “/mcp-client”

Requirements

  • Python 3

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. MCP_CONFIG_PATH env var (custom path)
  2. references/mcp-config.json (this skill's config - recommended)
  3. .mcp.json in project root
  4. ~/.claude.json

What it can do on your machine

Read from SKILL.md and the folder at commit 75e1e9c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python
    • pip

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • mcp.zapier.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

MCP Client loads about 1k tokens when it runs, and up to ~4k if it reads all its reference files. Until then it costs about 124 tokens; SKILL.md has 251 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~124
When it runs · the whole SKILL.md, loaded when a task matches
~1k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 251 words (~1,033 tokens).

“Connect to any MCP server with progressive disclosure - load tool schemas on-demand instead of dumping thousands of tokens into context upfront.”

— opening of SKILL.md by coleam00
name
mcp-client

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (scripts, references) in .claude/skills/mcp-client of coleam00/second-brain-skills.

  • SKILL.md
  • references/example-mcp-config.json
  • references/mcp-servers.md
  • references/python-mcp-sdk.md
  • scripts/mcp_client.py

Open the folder on GitHubat commit 75e1e9c

Compare with similar skills

MCP Client next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

MCP Client compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
MCP Client this skillcoleam00/second-brain-skills832—~1kAutomated safety check: PassNone
Triage Security Advisoriesactivepieces/activepieces25k—~3.9kAutomated safety check: PassCustom licence
Zapier Statuszapier/zapier-mcp430—~1.8kAutomated safety check: PassMIT
MCP Urgent Caller Triagezapier/gtm-cheat-codes342—~1kAutomated safety check: PassMIT
Zapier Workflowsdavila7/claude-code-templates32k2 repos~4.9kAutomated safety check: PassMIT
Makeericrisco/rsc-harness174—~3.1kAutomated safety check: NotesMIT

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Categories

Questions about MCP Client

What does MCP Client do?

Universal MCP client for connecting to any MCP server with progressive disclosure. MCP Client is an agent skill from coleam00/second-brain-skills. Universal MCP client for connecting to any MCP server with progressive disclosure.

When should I use MCP Client?

MCP Client fits situations like: interacting with external MCP servers (Zapier; sequential Thinking; listing available tools; executing MCP tool calls.

How do I install MCP Client in Claude Code?

Run `npx skills add coleam00/second-brain-skills --skill mcp-client -a claude-code`. Or copy the skill folder (.claude/skills/mcp-client in coleam00/second-brain-skills) into .claude/skills/mcp-client in your project. Claude Code loads it when a task matches its description.

How do I install MCP Client in Codex?

Run `npx skills add coleam00/second-brain-skills --skill mcp-client -a codex`. Or copy the skill folder (.claude/skills/mcp-client in coleam00/second-brain-skills) into .agents/skills/mcp-client in your project. Codex loads it when a task matches its description.

Can I use MCP Client in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add coleam00/second-brain-skills --skill mcp-client -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mcp-client, .gemini/skills/mcp-client, .github/skills/mcp-client and .opencode/skills/mcp-client in your project.

What does MCP Client need to run?

Going by SKILL.md and its folder, MCP Client needs Python for the scripts in its folder and the command-line tools its instructions call (python and pip). Our summary lists: Python 3.

Does MCP Client access the network?

SKILL.md names 1 domain. In commands or code: mcp.zapier.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is MCP Client safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does MCP Client use?

No licence was found for MCP Client or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does MCP Client use?

About 1k tokens (SKILL.md is roughly 4.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.9k tokens, read only when the agent opens those files.

What are the alternatives to MCP Client?

Skills that share tags, products or a category with MCP Client: Triage Security Advisories (activepieces/activepieces, 25k stars), Zapier Status (zapier/zapier-mcp, 430 stars), MCP Urgent Caller Triage (zapier/gtm-cheat-codes, 342 stars) and Zapier Workflows (davila7/claude-code-templates, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains MCP Client?

coleam00 (a GitHub user) maintains it in coleam00/second-brain-skills, which has 832 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on January 24, 2026.

Source: coleam00/second-brain-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.