mcp-servers-guide SKILL.md skillA
mcp-servers-guide from nirholas/three.ws is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nirholas/three.ws/mcp-servers-guide@git:20260501.87cefc9Pins git:20260501.87cefc9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nirholas/three.ws
- Path
data/skills/development/mcp-servers-guide/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260501.87cefc9, committed May 1, 2026
- Size
- 4,749 bytes
- Repository stars
- 269
- License
- Apache-2.0
Comprehensive guide to MCP (Model Context Protocol) servers — the standard for connecting AI agents to tools. Covers architecture, transport types, tool/resource/prompt primitives, security, and how to build, deploy, and discover MCP servers for any use case.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# MCP Servers Comprehensive Guide
MCP (Model Context Protocol) is the open standard for connecting AI agents to tools. This guide covers everything from architecture to deployment.
## What Is MCP?
```
AI Agent (Claude, GPT, etc.)
│
▼
MCP Client (built into host app)
│
▼
MCP Server (your tool/service)
│
├── Tools (functions the agent can call)
├── Resources (data the agent can read)
└── Prompts (templates for the agent)
```
## Core Primitives
### Tools
Functions the agent can execute:
```typescript
server.tool('getTokenPrice', {
description: 'Get the current price of a cryptocurrency',
parameters: z.object({
symbol: z.string().describe('Token symbol (e.g., SPA, ETH)'),
currency: z.string().default('usd').describe('Target currency')
}),
handler: async ({ symbol, currency }) => {
const price = await fetchPrice(symbol, currency);
return { content: [{ type: 'text', text: `${symbol}: $${price}` }] };
}
});
```
### Resources
Data the agent can read:
```typescript
server.resource('portfolio', {
description: 'User DeFi portfolio',
uri: 'portfolio://current',
handler: async () => {
…Read the whole file at its exact version.
How to install
mdr add nirholas/three.ws/mcp-servers-guide@sha256:101e9611d20c094bThe line at the top of this page pins the label git:20260501.87cefc9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xeeqcjrgdvcfbzgk)
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Versions
The registry has recorded 1 version of this file, committed on May 1, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4749 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nirholas/three.ws · 269 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xeeqcjrgdvcfbzgk GET https://markdownregistry.com/api/v1/resolve?ref=nirholas/three.ws/mcp-servers-guide GET https://markdownregistry.com/api/v1/blob/101e9611d20c094bab880ec2b44c3d5b8e75d53b0c0b1cb150beb8b8f7a1108a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.