afonsoft/skills · skills/building-mcp-servers/SKILL.md

building-mcp-servers skillA

building-mcp-servers is agent-read markdown (skill) from afonsoft/skills: Use when building MCP (Model Context Protocol) servers that let LLMs call external APIs or services, in TypeScript (MCP SDK), Python (FastMCP), or C# (ModelContextProtocol.AspNetCore). Covers tool design, transports (Streamable HTTP/stdio), OAuth 2.1 auth, and evaluations. Do NOT use for consuming or configuring an existing MCP server, or for non-MCP API integrations. Part of the afonsoft/skills collection..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add afonsoft/skills/building-mcp-servers@v1.2.1
Exact content
mdr add afonsoft/skills/building-mcp-servers@sha256:793f6a6a2990e829

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_urgzukyedzvhfqab.svg)](https://markdownregistry.com/a/art_urgzukyedzvhfqab)

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Versions

versioncommittedcommitsizeaudit
v1.2.1 latest2026-09-10 8136228 14,491 BA view · diff
v1.2.12026-09-10 53b6757 14,240 BA view · diff
v1.2.02026-09-05 9fa4cd6 12,858 BA view · diff
v1.2.02026-09-05 a9f7a95 12,818 BA view · diff
v1.1.02026-09-05 b5ea9c8 28,686 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (14491 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

GitHub

afonsoft/skills · 2 stars · license MIT · pushed 2026-09-11 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_urgzukyedzvhfqab
GET https://markdownregistry.com/api/v1/resolve?ref=afonsoft/skills/building-mcp-servers
GET https://markdownregistry.com/api/v1/blob/793f6a6a2990e8293424edec68048ef33d52e21b36ee3b8c33effc4286fa1c07