MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
A skill your agent uses when choosing between install, enable, disable, or delete for an MCP server; when an agent needs to discover or delegate to MCP servers; or when MCP tools fail with…
Install Using MCP Servers
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install friday-platform/friday-studio using-mcp-servers --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .claude/skills/using-mcp-servers && rm -rf skills-srcUse ~/.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/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .claude/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-serversType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install friday-platform/friday-studio using-mcp-servers --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .agents/skills/using-mcp-servers && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .agents/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install friday-platform/friday-studio using-mcp-servers --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .cursor/skills/using-mcp-servers && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .cursor/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/friday-platform/friday-studio.git --path packages/system/skills/using-mcp-servers--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install friday-platform/friday-studio using-mcp-servers --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .gemini/skills/using-mcp-servers && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .gemini/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install friday-platform/friday-studio using-mcp-serversInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .github/skills/using-mcp-servers && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .github/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add friday-platform/friday-studio --skill using-mcp-servers -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install friday-platform/friday-studio using-mcp-servers --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/friday-platform/friday-studio.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/system/skills/using-mcp-servers .opencode/skills/using-mcp-servers && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "using-mcp-servers" agent skill from https://github.com/friday-platform/friday-studio/tree/main/packages/system/skills/using-mcp-servers into .opencode/skills/using-mcp-servers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "using-mcp-servers", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
using-mcp-servers- GitHub stars
- 104
- Token cost
- ~1.8k tokens
- SKILL.md length
- 890 words
- Files
- 1
- Skills in repo
- 20
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when choosing between install, enable, disable, or delete for an MCP server; when an agent needs to discover or delegate to MCP servers; or when MCP tools fail with…
- Works in 6 steps: Discover: list_mcp_servers(scope?) —… → Connect if needed: If requiresConfig is… → Auto-continue: On… → …
- Choosing between install
- SKILL.md covers Overview, When to Use, Two contexts and Admin path: choosing the right…, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Using MCP Servers is an agent skill from friday-platform/friday-studio. Use when choosing between install, enable, disable, or delete for an MCP server; when an agent needs to discover or delegate to MCP servers; or when MCP tools fail with credential, connection, or prefixing issues.
Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol. The repository describes itself as: Agent Harness Platform — shareable workspaces, MCP tools, skills, memory, and cron/webhook automations. Self-hosted and transparent.
When your agent uses it
- Choosing between install
- Delete for an MCP server
- An agent needs to discover
- Delegate to MCP servers
Example prompts
- “/using-mcp-servers”
Requirements
- Python 3
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Discover: list_mcp_servers(scope?) — scope=workspace (default)
- Connect if needed: If requiresConfig is non-empty and provider is
- Auto-continue: On data-credential-linked, re-call list_mcp_servers
- Delegate: delegate validates IDs fail-fast. Unknown or unconfigured
- Tool naming: Child gets prefixed tools (strava_getActivity) when 2+
- Graceful degradation: One failed server does not kill the child.
What it can do on your machine
Read from SKILL.md and the folder at commit fb3069a. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Using MCP Servers loads about 1.8k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 890 words of instructions outside code blocks.
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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:85
ly supported way to touch a workspace's `.env` from chat. - NoteMentions a .env fileSKILL.md:87
ecret through `env_set` — the workspace `.env` is the non-secret store, - NoteMentions a .env fileSKILL.md:90
Never hand-edit `.env` files through `run_code` (curl/python/sed). It has - NoteMentions a .env fileSKILL.md:91
corrupted the daemon `.env` in practice. If a `delegate` or `list_mcp_tools` - NoteMentions a .env fileSKILL.md:98
| Hand-editing `.env` via `run_code` to set a server's env var | Didn't know `env_set` exists | `env_set` for non-secret
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); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 890 words (~1,786 tokens).
“There are two contexts for MCP servers: admin (changing what exists) and chat (using what exists). Agents in chat discover and use servers directly from the platform catalog — no workspace enable step required. Workspace enable/disable only controls workspace.yml overrides…”
- name
- using-mcp-servers
Files
Just SKILL.md in packages/system/skills/using-mcp-servers of friday-platform/friday-studio.
Open the folder on GitHubat commit fb3069a
Compare with similar skills
Using MCP Servers 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Using MCP Servers this skillfriday-platform/friday-studio | 104 | — | ~1.8k | Automated safety check: Notes | Custom licence | |
| MCP Server Builderanthropics/skills | 180k | 64 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 5 repos | ~1.2k | Automated safety check: Pass | MIT | |
| MCP Integration for Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~3.1k | Automated safety check: Pass | Apache-2.0 | |
| Fastmcp Client CLIPrefectHQ/fastmcp | 28k | 1 repos | ~823 | Automated safety check: Pass | Apache-2.0 | |
| Crush Configurationcharmbracelet/crush | 29k | — | ~3.7k | Automated safety check: Pass | Custom licence |
Similar skills
- Official
MCP Server Builder
shareAI-lab/learn-claude-code
Walks through building MCP servers in Python or TypeScript that expose tools, resources and prompts to Claude, with templates, registration and testing.
- Official
MCP Integration for Plugins
anthropics/claude-plugins-official
Explains how to bundle Model Context Protocol servers in a Claude Code plugin, covering config files, stdio, SSE, HTTP and WebSocket server types, and authentication.
Fastmcp Client CLI
PrefectHQ/fastmcp
Query and invoke tools on MCP servers using fastmcp list and fastmcp call.
Crush Configuration
charmbracelet/crush
Explains how to configure the Crush coding agent with crushrc or crush.json, covering providers, models, LSPs, MCP servers, hooks, permissions and config precedence.
Context Mode Output Sandbox
mksglu/context-mode
Routes large command, file, API and browser output through context-mode tools so only the needed result enters the agent's context, instead of dumping it via Bash.
More from friday-platform/friday-studio
All 20 skills in this repoAuthoring Skills
friday-platform/friday-studio
Authors new agent skills that follow the Anthropic + agentskills.io specification.
Friday CLI
friday-platform/friday-studio
Interacts with a running Friday daemon via CLI and HTTP — lists/creates/modifies workspaces, triggers signals, watches sessions, publishes skills and agents.
Workspace API
friday-platform/friday-studio
Create, list, update, delete, and clean up workspaces via the daemon HTTP API at $FRIDAYDURL.
Writing Workspace Signals
friday-platform/friday-studio
Authors Friday workspace signals with correct provider configs, payload schemas, and runtime wiring.
Composing Emails
friday-platform/friday-studio
General styling and tone guidelines for composing HTML emails.
Repairing Workspaces Agents
friday-platform/friday-studio
Repairs and upgrades existing Friday workspaces, jobs, user agents, and generated agents to current runtime contracts.
Related
Works with
Categories
Questions about Using MCP Servers
What does Using MCP Servers do?
A skill your agent uses when choosing between install, enable, disable, or delete for an MCP server; when an agent needs to discover or delegate to MCP servers; or when MCP tools fail with…. Using MCP Servers is an agent skill from friday-platform/friday-studio. Use when choosing between install, enable, disable, or delete for an MCP server; when an agent needs to discover or delegate to MCP servers; or when MCP tools fail with credential, connection, or prefixing issues.
When should I use Using MCP Servers?
Using MCP Servers fits situations like: choosing between install; delete for an MCP server; an agent needs to discover; delegate to MCP servers.
How do I install Using MCP Servers in Claude Code?
Run `npx skills add friday-platform/friday-studio --skill using-mcp-servers -a claude-code`. Or copy the skill folder (packages/system/skills/using-mcp-servers in friday-platform/friday-studio) into .claude/skills/using-mcp-servers in your project. Claude Code loads it when a task matches its description.
How do I install Using MCP Servers in Codex?
Run `npx skills add friday-platform/friday-studio --skill using-mcp-servers -a codex`. Or copy the skill folder (packages/system/skills/using-mcp-servers in friday-platform/friday-studio) into .agents/skills/using-mcp-servers in your project. Codex loads it when a task matches its description.
Can I use Using MCP Servers 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 friday-platform/friday-studio --skill using-mcp-servers -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/using-mcp-servers, .gemini/skills/using-mcp-servers, .github/skills/using-mcp-servers and .opencode/skills/using-mcp-servers in your project.
What does Using MCP Servers need to run?
SKILL.md names no scripts, command-line tools or credentials: Using MCP Servers is instructions for the agent only. Our summary lists: Python 3.
Does Using MCP Servers access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Using MCP Servers safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Using MCP Servers use?
Using MCP Servers has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Using MCP Servers use?
About 1.8k tokens (SKILL.md is roughly 7.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Using MCP Servers?
Skills that share tags, products or a category with Using MCP Servers: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and Fastmcp Client CLI (PrefectHQ/fastmcp, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Using MCP Servers?
friday-platform (a GitHub organization) maintains it in friday-platform/friday-studio, which has 104 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on September 5, 2026.
Source: friday-platform/friday-studio on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.