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Marco Arras

I build MCP tools for AI agents. Creator of Agent Toolbelt (1,600+ weekly npm downloads). Teaching developers to build, package, and ship MCP tools at build-mcp-tools.vercel.app.

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How I Got 1,600 Weekly npm Downloads with MCP Tools

How I Got 1,600 Weekly npm Downloads with MCP Tools

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4 min read
What is MCP? A Developer's Guide with Working Code

What is MCP? A Developer's Guide with Working Code

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4 min read
The Agentic Shift — Why AI Developers Need to Learn MCP Now

The Agentic Shift — Why AI Developers Need to Learn MCP Now

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3 min read
I gave Claude real-time stock analysis. Here's how it works.

I gave Claude real-time stock analysis. Here's how it works.

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4 min read
Three API Calls That Make Your LLM Workflow Dramatically Better

Three API Calls That Make Your LLM Workflow Dramatically Better

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5 min read
I Stopped Writing JSON Schemas and Regex by Hand. Here's What I Do Instead.

I Stopped Writing JSON Schemas and Regex by Hand. Here's What I Do Instead.

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5 min read
5 API Tools That Save AI Developers Hours of Boilerplate

5 API Tools That Save AI Developers Hours of Boilerplate

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5 min read
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