Claude Skills vs MCP: When to Use Which
Claude Skills teach the assistant how to do a job. MCP gives it access to live tools and data. They are not substitutes. Anthropic said this outright after customers asked the same two questions: how do skills and MCP work together, and when should you use one versus the other.
Live Google Autocomplete for claude skills vs mcp and skills vs mcp returns a full related-search set (skills vs MCP server, vs plugins, vs agents, token usage, Reddit). This page answers that query. It is not another “what is MCP” explainer. That lives at What is MCP?.
Anthropic’s split, in one table
From Anthropic’s 18 December 2025 post Extending Claude’s capabilities with skills and MCP:
| Skills | MCP | |
|---|---|---|
| What it is | Procedural knowledge | Tool connectivity |
| What it does | Teaches *how* | Gives *access* |
| When it loads | On demand, when relevant | Available once connected (schemas often load up front) |
| Contains | Instructions, scripts, templates | Tools, resources, prompts |
| Best for | Workflows, standards, methodology | Data access, API calls, external actions |
Their one-line test: if you are explaining *how*, that is a skill. If Claude needs to *access* something, that is MCP.
Do skills replace MCP? Anthropic’s answer is no. “Most powerful workflows use both.”
The Model Context Protocol is the open wire other clients speak too: ChatGPT Developer mode, Cursor, Grok. Skills as a file format started on Claude and are spreading; MCP is already the shared plug.
What people actually mix up
A founder writes a SKILL.md that says “audit this URL for SEO” and wonders why Claude still cannot crawl the page. The skill is the recipe. There is still no oven.
A developer installs five MCP servers, then writes no instructions, and wonders why Claude calls the wrong tool. Access without a method is a junk drawer. See Too many MCP tools.
Reddit and Google both treat skills vs mcp reddit as a related query. The useful thread is not “which wins.” It is “which job.”
Give your AI superpowers. Copy one instruction and paste it into your AI.
Where ToolRouter sits
ToolRouter is an MCP catalog: SEO, image, scrape, search, research. Connect once in Claude, ChatGPT, or Cursor. That is access.
On top of that, ToolRouter publishes operation guidance as Agent Skills through the draft MCP Skills Extension (Skills over MCP). A skills-aware host can list and load one SKILL.md on demand instead of stuffing every tool schema into the first message. The proposal (SEP-2640) is still in review. Hosts that do not speak it keep using discover and use_tool.
Team angle: one catalog for everyone, then your own skills for *how this company writes a brief*. How to manage MCP for a team.
A rule you can use on Monday
- Need a live URL, a quote, a file, an API? MCP. Connect ToolRouter or a first-party connector.
- Need Claude to follow your house style, a checklist, or a sequence? A Skill or a project instruction.
- Need both? Skill that tells Claude when to call the catalog. Do not encode the API in Markdown and hope.
Claude Team owners add the MCP connector once. Members Connect. How to add MCP on Claude Team.
When this page is not the answer
- You wanted a ranked list of servers. Best MCP tools for Claude.
- You wanted ChatGPT’s path. Can ChatGPT use MCP tools?.
- You wanted Anthropic’s own words only. Read their skills and MCP post.
Connect ToolRouter for access. Write a short skill for how your team uses it.
Frequently Asked Questions
Is MCP dead now that Claude has Skills?
**No.** Anthropic still ships MCP for access. Skills do not fetch your CRM or run an SEO crawl by themselves.
Why does Google keep suggesting “skills vs mcp token usage”?
**Skills load on demand. Many MCP clients still inject every tool schema up front.** That is the token complaint. Details: [Too many MCP tools](/blog/too-many-mcp-tools).
Can ChatGPT use Skills the same way?
**ChatGPT’s public path today is MCP / Developer mode apps**, not Claude’s SKILL.md format. Same access idea, different host.
Do we need both on a team?
**Yes if you share tools and you share a way of working.** MCP for the catalog. Skills for the playbook.
