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HTML
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MCP Server
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modelcontextprotocol/python-sdk
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MCP Server
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modelcontextprotocol/python-sdk
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Introduction
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Introduction
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Quick Example
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Getting Started
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API Reference
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<h1 id="mcp-python-sdk">MCP Python SDK</h1>
|
|
<p>The <strong>Model Context Protocol (MCP)</strong> allows applications to provide context for LLMs in a standardized way, separating the concerns of providing context from the actual LLM interaction.</p>
|
|
<p>This Python SDK implements the full MCP specification, making it easy to:</p>
|
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<ul>
|
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<li><strong>Build MCP servers</strong> that expose resources, prompts, and tools</li>
|
|
<li><strong>Create MCP clients</strong> that can connect to any MCP server</li>
|
|
<li><strong>Use standard transports</strong> like stdio, SSE, and Streamable HTTP</li>
|
|
</ul>
|
|
<p>If you want to read more about the specification, please visit the <a href="https://modelcontextprotocol.io">MCP documentation</a>.</p>
|
|
<h2 id="quick-example">Quick Example</h2>
|
|
<p>Here's a simple MCP server that exposes a tool, resource, and prompt:</p>
|
|
<div class="language-python highlight"><span class="filename">server.py</span><pre><span></span><code><span class="kn">from</span><span class="w"> </span><span class="nn">mcp.server.fastmcp</span><span class="w"> </span><span class="kn">import</span> <span class="n">FastMCP</span>
|
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|
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<span class="n">mcp</span> <span class="o">=</span> <span class="n">FastMCP</span><span class="p">(</span><span class="s2">"Test Server"</span><span class="p">,</span> <span class="n">json_response</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
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|
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<span class="nd">@mcp</span><span class="o">.</span><span class="n">tool</span><span class="p">()</span>
|
|
<span class="k">def</span><span class="w"> </span><span class="nf">add</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">b</span><span class="p">:</span> <span class="nb">int</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
|
|
<span class="w"> </span><span class="sd">"""Add two numbers"""</span>
|
|
<span class="k">return</span> <span class="n">a</span> <span class="o">+</span> <span class="n">b</span>
|
|
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|
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<span class="nd">@mcp</span><span class="o">.</span><span class="n">resource</span><span class="p">(</span><span class="s2">"greeting://</span><span class="si">{name}</span><span class="s2">"</span><span class="p">)</span>
|
|
<span class="k">def</span><span class="w"> </span><span class="nf">get_greeting</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
|
<span class="w"> </span><span class="sd">"""Get a personalized greeting"""</span>
|
|
<span class="k">return</span> <span class="sa">f</span><span class="s2">"Hello, </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">!"</span>
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<span class="nd">@mcp</span><span class="o">.</span><span class="n">prompt</span><span class="p">()</span>
|
|
<span class="k">def</span><span class="w"> </span><span class="nf">greet_user</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">style</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"friendly"</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
|
<span class="w"> </span><span class="sd">"""Generate a greeting prompt"""</span>
|
|
<span class="k">return</span> <span class="sa">f</span><span class="s2">"Write a </span><span class="si">{</span><span class="n">style</span><span class="si">}</span><span class="s2"> greeting for someone named </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">."</span>
|
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|
|
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">"__main__"</span><span class="p">:</span>
|
|
<span class="n">mcp</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="n">transport</span><span class="o">=</span><span class="s2">"streamable-http"</span><span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>Run the server:</p>
|
|
<div class="language-bash highlight"><pre><span></span><code>uv<span class="w"> </span>run<span class="w"> </span>--with<span class="w"> </span>mcp<span class="w"> </span>server.py
|
|
</code></pre></div>
|
|
<p>Then open the <a href="https://github.com/modelcontextprotocol/inspector">MCP Inspector</a> and connect to <code>http://localhost:8000/mcp</code>:</p>
|
|
<div class="language-bash highlight"><pre><span></span><code>npx<span class="w"> </span>-y<span class="w"> </span>@modelcontextprotocol/inspector
|
|
</code></pre></div>
|
|
<h2 id="getting-started">Getting Started</h2>
|
|
<!-- TODO(Marcelo): automatically generate the follow references with a header on each of those files. -->
|
|
<ol>
|
|
<li><strong><a href="installation/">Install</a></strong> the MCP SDK</li>
|
|
<li><strong><a href="server/">Build servers</a></strong> - tools, resources, prompts, transports, ASGI mounting</li>
|
|
<li><strong><a href="client/">Write clients</a></strong> - connect to servers, use tools/resources/prompts</li>
|
|
<li><strong><a href="authorization/">Explore authorization</a></strong> - add security to your servers</li>
|
|
<li><strong><a href="low-level-server/">Use low-level APIs</a></strong> - for advanced customization</li>
|
|
<li><strong><a href="protocol/">Protocol features</a></strong> - MCP primitives, server capabilities</li>
|
|
</ol>
|
|
<h2 id="api-reference">API Reference</h2>
|
|
<p>Full API documentation is available in the <a href="api/">API Reference</a>.</p>
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<script id="init-glightbox">const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});
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document$.subscribe(()=>{ lightbox.reload(); });
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</script></body></html> |